Korean 「-는 김에」 is often translated as “while you’re at it” or “by the way,” which makes it look easy to understand, but in actual use it is easily confused with 「-는 길에」 and 「-면서」. It does not simply mean that two things happen at the same time. Instead, there is already one thing you were going to do, and you take that opportunity to handle one more thing. In 「마트에 가는 김에 우유도 사 올게요」, the point is not simply “I’ll buy milk when I go to the supermarket,” but rather “Since I’m already making a trip to the supermarket, I’ll get the milk too.”

This is also the main difference between 「-는 김에」 and 「-는 길에」「-다가」「-면서」. 「-는 김에」 focuses on whether the first action can be used as an opportunity; the other patterns respectively describe something happening on the way, a shift in the middle of an action, or two actions happening simultaneously.

What Does Korean 「-는 김에」 Mean? The First Action Becomes an Opportunity for the Second

「-는 김에」 means using the action in the first clause as an opportunity to complete another related action. The first action is usually something that was already planned, is already in progress, or has already become an established situation; the second action is then added by taking advantage of that opportunity.

Therefore, although 「-는 김에」 is often translated as “while you’re at it,” its nuance is more specific than the English translation might suggest. The sentence carries the feeling of “Since this is already happening, I might as well take care of this other thing too.”

• Example: 마트에 가는 김에 우유도 사 올게요.
  Romanization: ma-teu-e ga-neun gim-e u-yu-do sa ol-ge-yo.
  Translation: I’m going to the supermarket, so I’ll pick up some milk while I’m there.
  Going to the supermarket is already part of the plan, while buying milk is the additional task added to that trip.
• Example: 방을 청소하는 김에 책상 서랍도 정리했어요.
  Romanization: bang-eul cheong-so-ha-neun gim-e chaek-sang seo-rab-do jeong-ri-hae-sseo-yo.
  Translation: While cleaning the room, I also organized the desk drawers.
  Organizing the drawers may not have required a separate plan, but cleaning the room created a convenient opportunity to handle them too.
• Example: 서울에 온 김에 전시회도 보고 가세요.
  Romanization: seo-ul-e on gim-e jeon-si-hoe-do bo-go ga-se-yo.
  Translation: Since you’re already in Seoul, go see an exhibition before you leave too.
  Being in Seoul is already an established situation, so the speaker uses that opportunity to suggest an additional activity.

How Does Korean 「-는 김에」 Conjugate? Both 「가는 김에」 and 「간 김에」 Are Possible

「-는 김에」 combines only with expressions that involve an action. Its basic forms can be divided into 「-는 김에」 and 「-(으)ㄴ 김에」. 「-는 김에」 presents the first action as ongoing, generally occurring, or about to occur, while 「-(으)ㄴ 김에」 treats the first action as already established or completed and then uses it as the opportunity for the second clause.

This should not be simplified into “-는 김에 = present” and “-(으)ㄴ 김에 = past.” For example, 「경복궁에 간 김에 북촌에도 가 보세요」 can still be used even if the listener has not actually arrived at Gyeongbokgung yet. The speaker first treats “having gone to Gyeongbokgung” as a completed point and then suggests, “Since you’ll already be there, go to Bukchon too.”

How the First Action Is Viewed	Structure	Examples
An action in progress, planned, or generally taking place	V＋는 김에	가는 김에、청소하는 김에
An action viewed as completed or established	No final consonant / ㄹ-final＋ㄴ 김에	간 김에、온 김에、만든 김에
An action viewed as completed or established	Other final consonant＋은 김에	먹은 김에、읽은 김에、들은 김에

What Is the Difference Between 「가는 김에」 and 「간 김에」?

「가는 김에」 presents “going” as an action currently being planned or prepared, while 「간 김에」 first treats arrival at the destination as established and then extends another action from that point. Both can work in some contexts; the difference lies in how the speaker views the first action.

• Example: 경복궁에 가는 김에 북촌에도 가 보세요.
  Romanization: gyeong-bok-gung-e ga-neun gim-e buk-chon-e-do ga bo-se-yo.
  Translation: When you go to Gyeongbokgung, stop by Bukchon too while you’re there.
  The focus is on the overall trip to Gyeongbokgung that is about to happen, with Bukchon added into the itinerary.
• Example: 경복궁에 간 김에 북촌에도 가 보세요.
  Romanization: gyeong-bok-gung-e gan gim-e buk-chon-e-do ga bo-se-yo.
  Translation: Since you’re already going to Gyeongbokgung, stop by Bukchon too.
  Here, “having gone to Gyeongbokgung” is first treated as an established condition, and the Bukchon visit is added from there.

Both sentences may be translated similarly, but the Korean time perspective is not exactly the same.

Can 「-는 김에」 Be Used With Adjectives? First Check Whether the First Clause Creates an Opportunity

「김」 refers to an opportunity or occasion created by something, so it sounds most natural when the first clause contains a concrete action or event.

For example:

△ 날씨가 좋은 김에 산책하러 갈까요?
Since the weather is nice, shall we go for a walk?
The meaning can be understood, but 「좋다」 is only a static state, so it does not fit especially well with the action-opportunity nuance of 「김에」.

A more natural sentence would be:

✅ 날씨가 좋은데 산책하러 갈까요?
The weather is nice, so shall we go for a walk?

If the first clause describes an actual event, however, the pattern works more naturally:

✅ 해가 뜬 김에 산책하러 갈까요?
Since the sun has come out, shall we go for a walk?

「해가 뜨다」 describes an actual change that occurred and can therefore be used as an opportunity for the following action.

Three Common Uses of Korean 「-는 김에」

The use of 「-는 김에」 is not limited to buying something while already going out. As long as the relationship is “the first action is already established, and the second action is added by taking advantage of that opportunity,” it can be used for travel, housework, work, conversations, and even decisions that have already been made.

「-는 김에」 Usage ①｜Using an Existing Trip to Get One More Thing Done

Movement is the easiest context for understanding 「-는 김에」. You were already going to the supermarket, bank, office, or another city, so you add another task that also needs to be handled into the same trip.

The second clause is usually not an inevitable result of the first. If you were not going to the bank, you might not make a special trip just to exchange currency. If you were not going to the office, you might not go there only to submit one document. That is exactly why the sense of “taking advantage of this opportunity” appears.

• Example: 은행에 가는 김에 환전도 하려고 해요.
  Romanization: eun-haeng-e ga-neun gim-e hwan-jeon-do ha-ryeo-go hae-yo.
  Translation: Since I’m going to the bank, I’m planning to exchange some money while I’m there.
  The bank trip already exists, while the currency exchange is an additional task added to it.
• Example: 회사에 가는 김에 이 서류도 제출해 주세요.
  Romanization: hoe-sa-e ga-neun gim-e i seo-ryu-do je-chul-hae ju-se-yo.
  Translation: Since you’re going to the office, please submit this document while you’re there.
  There is no need to make another separate trip just for the document, so 「-는 김에」 sounds natural.
• Example: 약국에 들르는 김에 비타민도 사야겠어요.
  Romanization: yak-guk-e deul-leu-neun gim-e bi-ta-min-do sa-ya-ge-sseo-yo.
  Translation: Since I’m stopping by the pharmacy, I should pick up some vitamins too.
  The brief stop at the pharmacy creates an opportunity to make an additional purchase.

「-는 김에」 Usage ②｜Handling Related Tasks While Already Working on Something

The first clause of 「-는 김에」 does not have to contain a movement verb. Doing laundry, cleaning, organizing files, making a phone call, or preparing for a meeting can all create a convenient opportunity for another related task.

This is where 「-는 김에」 is easily confused with 「-면서」. 「-면서」 only requires two things to happen at the same time. 「-는 김에」 requires the second action to be something added by taking advantage of the first action.

• Example: 빨래하는 김에 수건도 같이 빨았어요.
  Romanization: ppal-lae-ha-neun gim-e su-geon-do ga-chi ppa-ra-sseo-yo.
  Translation: While doing the laundry, I washed the towels too.
  Washing the towels is an additional task handled because the laundry was already being done, not simply another action that happened at the same time.
• Example: 회의 자료를 만드는 김에 발표 순서도 확인했어요.
  Romanization: hoe-ui ja-ryo-reul man-deu-neun gim-e bal-pyo sun-seo-do hwak-in-hae-sseo-yo.
  Translation: While preparing the meeting materials, I also checked the presentation order.
  Both tasks belong to preparation for the same meeting, so they can naturally be grouped under the same opportunity.
• Example: 엄마에게 전화하는 김에 주말 계획도 물어봤어요.
  Romanization: eom-ma-e-ge jeon-hwa-ha-neun gim-e ju-mal gye-hoek-do mu-reo-bwa-sseo-yo.
  Translation: While calling my mother, I also asked about the weekend plans.
  The phone call was already going to happen, while asking about the weekend plans was an additional topic handled during that call.

「-(으)ㄴ 김에」 Usage ③｜Since You’ve Already Come This Far, You Might as Well Do One More Thing

「-(으)ㄴ 김에」 frequently appears together with 「이왕」 or 「기왕」, making the “since you’ve already…” nuance even stronger. The first clause is already a fact, and the second clause uses that fact as a reason to go one step further.

In these cases, translating it simply as “while you’re at it” may not always sound natural. “Since you’ve already…” or “Now that you’ve already…, you might as well…” is often closer to the actual nuance.

• Example: 이왕 시작한 김에 끝까지 해 봅시다.
  Romanization: i-wang si-jak-han gim-e kkeut-kka-ji hae bop-si-da.
  Translation: Since we’ve already started, let’s try to finish it.
  Starting has already become an established fact, and the second clause uses that fact to suggest continuing to the end.
• Example: 부산까지 온 김에 바다도 보고 가려고 해요.
  Romanization: bu-san-kka-ji on gim-e ba-da-do bo-go ga-ryeo-go hae-yo.
  Translation: Since I’ve already come all the way to Busan, I’m planning to see the sea before I leave too.
  Being in Busan is already the current situation, so the speaker uses it as an opportunity to add a visit to the sea.
• Example: 기왕 늦은 김에 밥이나 먹고 천천히 갑시다.
  Romanization: gi-wang neu-jeun gim-e ba-bi-na meok-go cheon-cheon-hi gap-si-da.
  Translation: Since we’re already late, let’s just eat something and take our time.
  Being late can no longer be changed, so the speaker uses the current situation to rearrange what happens next.

What Is the Difference Between Korean 「-는 김에」「-는 길에」「-다가」「-면서」?

All four patterns can appear in sentences where two actions happen close together, but their relationships are completely different. 「-는 김에」 uses an opportunity, 「-는 길에」 describes something happening on the way or during a process, 「-다가」 shows a change that occurs midway through an action, and 「-면서」 simply describes two actions continuing simultaneously.

Comparison	「-는 김에」	「-는 길에」	「-다가」	「-면서」
Basic meaning	While doing A / Since A is happening, take the opportunity to also do B	B happens or is done on the way / during A	While doing A, B happens or the action shifts to B	Do A while doing B
Most important nuance	Using the opportunity created by A	B occurs during the route or process of A	A is in progress when something changes	Two actions happen simultaneously
Relationship between A and B	A creates the condition or opportunity; B is an added action	B happens during A; in some cases the route can also be used to do B	B enters while A is in progress	A and B continue during the same period
Was A already going to happen?	Usually yes. A is generally already planned, ongoing, or established	Usually yes. A is an ongoing route or process	Not important; it simply describes A already being in progress	Not important as long as both actions can happen simultaneously
Is B usually an additional task?	Usually yes	Not necessarily	Usually not an “extra task,” but another action or event that appears midway	Not necessarily; neither action needs to be primary
Does it require a “while you’re at it” meaning?	Yes, there must be an opportunity relationship	No; it may simply describe something happening on the way	No	No
Does it emphasize “on the way”?	No	Yes	There is a “midway through” feeling, but the focus is on change	No
Does it emphasize simultaneous actions?	Not necessarily	Not necessarily	Usually not simple simultaneity; there is a transition between events	Yes
Can the first action be interrupted?	Not emphasized	Not emphasized	Very often involves interruption, stopping, or changing direction	Usually continues
Can B be an unexpected event?	Usually not; B is generally something intentionally done using the opportunity	Yes, such as unexpectedly meeting a friend on the way	Yes, very often	Can describe simultaneous circumstances, but does not carry a “sudden interruption” nuance
Can B be intentionally planned?	Very common	Yes, especially when doing something along the way	Yes, but it sounds like A was interrupted midway to do B	Yes, as long as both actions truly overlap
Common situations	Shopping, errands, travel, organizing, work	Commuting, going out, going somewhere, returning somewhere	Working halfway through something, eating, walking when another event occurs	Talking while eating, studying while listening to music, talking on the phone while walking
Especially common with movement verbs?	Common, but not limited to them	Very common	Possible	Possible, but no special restriction
Typical English translation	While you’re at it / Since you’re already…	On the way / While going…	While doing… / Halfway through… / Then switched to…	While doing… / At the same time…
Best question to ask when deciding	“Is B being added because A created a convenient opportunity?”	“Does B happen during the route or process of A?”	“Was A already in progress when B appeared or took over?”	“Are A and B continuing during the same period?”
Most common confusion	Learners see two nearby actions and use it even without an opportunity relationship	Often treated as identical to 「-는 김에」, even though it can simply describe something happening on the way	Often translated merely as “and then,” even though it carries a clear midway transition	Easily confused with 「-는 김에」 because both can be translated with “while,” but it has no opportunity meaning

▌「-는 김에」 vs 「-는 길에」｜The First Uses an Opportunity, the Second Describes Something Happening on the Way

The 「길」 in 「-는 길에」 can describe the route or process of doing something, so it does not always have to refer literally to a physical road. However, it is especially common with movement verbs such as 「가다」 and 「오다」 and is often translated as “on the way.”

「-는 김에」, by contrast, focuses on the idea that “since I’m already doing this, I’ll take the opportunity to do something else too.” The second clause usually has the nuance of an additional plan.

• Example: 마트에 가는 길에 친구를 만났어요.
  Romanization: ma-teu-e ga-neun gil-e chin-gu-reul man-na-sseo-yo.
  Translation: I met a friend on the way to the supermarket.
  Meeting the friend simply happened during the trip to the supermarket. The speaker did not use the supermarket trip as an opportunity to meet them.
• Example: 마트에 가는 김에 우유도 사 왔어요.
  Romanization: ma-teu-e ga-neun gim-e u-yu-do sa wa-sseo-yo.
  Translation: Since I was going to the supermarket, I picked up some milk too.
  Buying milk was intentionally added by taking advantage of the supermarket trip, so 「-는 김에」 is natural.

Both involve “going to the supermarket,” but one asks where something happened during the process, while the other asks what else could be accomplished by using that trip.

▌「-는 김에」 vs 「-다가」｜One Adds a Task, the Other Shows a Midway Shift

「-다가」 means that A was already in progress when B happened or the action shifted to B. The first action often carries a sense of being unfinished, interrupted, or changed.

「-는 김에」 does not contain this interruption. A continues normally, and because A creates a convenient condition, B is simply added.

• Example: 방을 청소하다가 오래된 사진을 찾았어요.
  Romanization: bang-eul cheong-so-ha-da-ga o-rae-doen sa-jin-eul cha-ja-sseo-yo.
  Translation: While cleaning the room, I found some old photos.
  Finding the photos is a new event that happens during cleaning, not an intentionally added task.
• Example: 방을 청소하는 김에 오래된 사진도 정리했어요.
  Romanization: bang-eul cheong-so-ha-neun gim-e o-rae-doen sa-jin-do jeong-ri-hae-sseo-yo.
  Translation: While cleaning the room, I also organized the old photos.
  Organizing the photos is an intentional extra task added by taking advantage of the cleaning.

With 「-다가」, the old photos feel like something unexpectedly encountered during cleaning. With 「-는 김에」, organizing them becomes an extra item deliberately added to the to-do list.

▌「-는 김에」 vs 「-면서」｜One Has an Opportunity Relationship, the Other Only Requires Simultaneous Action

The condition for 「-면서」 is simple: the two actions happen during the same period. There does not need to be a relationship of “since I’m already doing A, I’ll also do B.”

「-는 김에」 requires that opportunity relationship.

• Example: 음악을 들으면서 방을 청소했어요.
  Romanization: eum-ak-eul deu-reu-myeon-seo bang-eul cheong-so-hae-sseo-yo.
  Translation: I cleaned the room while listening to music.
  Listening to music and cleaning simply happen at the same time. Neither is being done because the other created an opportunity.
• Example: 방을 청소하는 김에 창문도 닦았어요.
  Romanization: bang-eul cheong-so-ha-neun gim-e chang-mun-do dak-a-sseo-yo.
  Translation: While cleaning the room, I also wiped the windows.
  Wiping the windows is an additional cleaning task added because the cleaning had already begun.

▌「-는 김에」 vs 「-(으)ㄹ 때」｜“When…” Does Not Always Mean “While You’re At It”

「-(으)ㄹ 때」 only indicates the time when something happens. 「-는 김에」 additionally requires the first clause to become an opportunity for the second, so the two cannot be exchanged simply because both may be translated with “when.”

• Example: 한국에 갈 때 여권을 꼭 챙기세요.
  Romanization: han-gu-ge gal ttae yeo-gwon-eul kkok chaeng-gi-se-yo.
  Translation: Make sure to bring your passport when you go to Korea.
  A passport is a necessary travel item. The sentence only tells you what to do when going to Korea and does not contain a “while you’re at it” meaning.
• Example: 한국에 가는 김에 친구도 만나고 올게요.
  Romanization: han-gu-ge ga-neun gim-e chin-gu-do man-na-go ol-ge-yo.
  Translation: Since I’m going to Korea, I’ll meet a friend while I’m there too.
  The trip to Korea is already established, while meeting the friend is an additional plan added to that trip.

▌Comparing 「-는 김에」「-는 길에」「-다가」「-면서」 in the Same “Going to the Supermarket” Situation

Putting all four patterns into the same “going to the supermarket” situation makes the differences much easier to see. All four sentences involve a supermarket trip, but the speaker’s focus changes. 「-는 김에」 uses the trip as an opportunity to do something else; 「-는 길에」 describes something happening on the way; 「-다가」 shows another event or action appearing midway through the trip; 「-면서」 describes another action continuing at the same time as going to the supermarket.

• Example: 마트에 가는 김에 우유도 사 올게요.
  Romanization: ma-teu-e ga-neun gim-e u-yu-do sa ol-ge-yo.
  Translation: Since I’m going to the supermarket, I’ll pick up some milk too.
  The supermarket trip was already planned, and buying milk is an additional task added to it. 「-는 김에」 carries the feeling of “Since I’m going anyway, I might as well take care of this too.”
• Example: 마트에 가는 길에 친구를 만났어요.
  Romanization: ma-teu-e ga-neun gil-e chin-gu-reul man-na-sseo-yo.
  Translation: I met a friend on the way to the supermarket.
  The friend simply appeared during the trip. There is no sense of using the supermarket trip to accomplish an extra task. 「-는 길에」 mainly tells you that something happened while heading somewhere.
• Example: 마트에 가다가 친구를 만나서 잠깐 이야기했어요.
  Romanization: ma-teu-e ga-da-ga chin-gu-reul man-na-seo jam-kkan i-ya-gi-hae-sseo-yo.
  Translation: I was on my way to the supermarket when I ran into a friend, so we talked for a while.
  The speaker was already going to the supermarket, but after meeting the friend, the action temporarily shifts to talking. 「-다가」 gives the sense that the first action was underway when a new event or change occurred.
• Example: 마트에 가면서 친구와 통화했어요.
  Romanization: ma-teu-e ga-myeon-seo chin-gu-wa tong-hwa-hae-sseo-yo.
  Translation: I talked to a friend on the phone while going to the supermarket.
  Going to the supermarket and talking on the phone happen during the same period. There is no “using the opportunity” or “midway shift” relationship. 「-면서」 simply expresses simultaneous actions.

Even though every sentence involves going to the supermarket, 「-는 김에」 asks what else was done by taking advantage of the trip, 「-는 길에」 asks what happened on the way, 「-다가」 shows what changed during the trip, and 「-면서」 describes what else happened at the same time.

If you want to reduce the four patterns to the easiest possible memory aid:

「-는 김에」＝You have the opportunity, so you do one more thing
「-는 길에」＝Something happens during the route or process
「-다가」＝Something changes midway through an action
「-면서」＝Two actions happen at the same time

Can 「-는 김에」 Be Used With 「이왕」「기왕」?

「이왕／기왕＋-(으)ㄴ／는 김에」 is a very common combination that makes the “since you’ve already…” nuance much clearer. 「이왕」 and 「기왕」 already carry the meaning that things have reached a certain point, and when followed by 「김에」, the second clause usually means “we might as well go one step further.”

• Example: 이왕 나온 김에 커피도 한잔할까요?
  Romanization: i-wang na-on gim-e keo-pi-do han-jan-hal-kka-yo?
  Translation: Since we’re already out, shall we have a cup of coffee too?
  Being outside has already created an opportunity, so having coffee is added to the outing.
• Example: 기왕 시작한 김에 오늘 다 끝내려고 해요.
  Romanization: gi-wang si-jak-han gim-e o-neul da kkeut-nae-ryeo-go hae-yo.
  Translation: Since I’ve already started, I’m planning to finish everything today.
  Starting is already an established fact, so the speaker decides to finish the rest as well.
• Example: 이왕 제주도까지 온 김에 며칠 더 있다 갈래요.
  Romanization: i-wang je-ju-do-kka-ji on gim-e mye-chil deo it-da gal-lae-yo.
  Translation: Since I’ve already come all the way to Jeju Island, I want to stay a few more days before leaving.
  Arriving in Jeju is already established, and the speaker uses that condition to change the original itinerary.

Everyday Korean Examples With 「-는 김에」: Shopping, Errands, and Travel

「-는 김에」 is especially useful for everyday situations where you do not need to make a separate trip. Bringing something for a coworker, eating somewhere while already in the area, or checking attachments while already organizing documents are all natural uses.

It also does not necessarily mean that the second action is small. The important point is that the second action must be based on the opportunity created by the first. If the two actions have no such relationship, forcing 「-는 김에」 into the sentence sounds unnatural.

▌Situation ①｜Buying Something While Going to the Supermarket

A：마트에 가는 길이에요?
　　ma-teu-e ga-neun gi-ri-e-yo?
　　Are you on your way to the supermarket?

B：네. 가는 김에 세제도 사 올게요.
　　ne. ga-neun gim-e se-je-do sa ol-ge-yo.
　　Yes. Since I’m going, I’ll pick up some detergent too.

📌 Grammar Point: A’s 「가는 길」 asks whether the person is currently on the way to the supermarket. B’s 「가는 김에」 treats the supermarket trip as an opportunity to buy detergent. The same short dialogue clearly shows the difference between 「길」 and 「김」.

▌Situation ②｜Delivering a Document While Going to the Meeting Room

A：지금 회의실에 가세요?
　　ji-geum hoe-ui-sil-e ga-se-yo?
　　Are you going to the meeting room now?

B：네. 가는 김에 이 계약서도 전달할게요.
　　ne. ga-neun gim-e i gye-yak-seo-do jeon-dal-hal-ge-yo.
　　Yes. Since I’m going there, I’ll deliver this contract too.

📌 Grammar Point: Delivering the contract is not simply something that happens during the route to the meeting room. Because the speaker is already going there, there is no need to make a separate trip.

▌Situation ③｜Adding Another Destination to a Trip

A：이번에 부산에 간다면서요?
　　i-beon-e bu-san-e gan-da-myeon-seo-yo?
　　I heard you’re going to Busan this time?

B：네. 간 김에 경주에도 들러 보려고요.
　　ne. gan gim-e gyeong-ju-e-do deul-leo bo-ryeo-go-yo.
　　Yes. Since I’m going there anyway, I’m thinking of stopping by Gyeongju too.

📌 Grammar Point: 「간 김에」 first treats going to Busan as an established trip and then adds Gyeongju from that point. This perspective can be used even if the trip has not actually happened yet at the moment of speaking.

Cultural Notes:

1. The 「김」 in this grammar pattern is not the everyday word 「김」 meaning seaweed. It is a dependent noun referring to an opportunity or occasion created by something, so expressions such as 「가는 김에」「온 김에」 need to be understood as complete units.
2. 「이왕」「기왕」 frequently appear together with 「김에」. The former words make the “since things have already reached this point” feeling clearer. For example, 「이왕 온 김에」 is close to “Since you’re already here.”
3. 「-는 길에」 and 「-는 김에」 are not absolutely mutually exclusive in every possible context. 「길」 itself can sometimes carry the idea of doing something during a journey or taking advantage of being on the way, so there is some overlap in real usage. However, for a stable basic distinction, first ask whether the sentence mainly describes something happening “on the way” or emphasizes “using this opportunity.”

How Does Korean 「-는 김에」 Compare With Japanese 「〜ついでに」?

Korean 「-는 김에／-(으)ㄴ 김에」 is very close to Japanese 「〜ついでに」. Both can express that there is already one main action and that the same time, place, or opportunity is used to complete another task, such as stopping at the post office while already going to the bank or organizing old books while already cleaning the room.

Korean chooses between 「-는 김에」 and 「-(으)ㄴ 김에」 according to how the speaker views the timing of the first action, while Japanese 「〜ついでに」 can follow the verb dictionary form, the た-form, or 「noun＋の」. Both are often translated as “while you’re at it,” but Korean 「김에」 can also carry the stronger meaning “since you’ve already…, take this opportunity to…,” so their usage ranges are not completely identical.

◆ Similar Grammar: Japanese 「〜ついでに」

Japanese 「〜ついでに」 means using something you were already going to do or have already done as an opportunity to complete another additional action. The first clause is the original main action, while the second is an additional arrangement made by taking advantage of the same time, movement, or opportunity. This is very close to the basic use of Korean 「-는 김에／-(으)ㄴ 김에」.

• Example: 銀行へ行くついでに、郵便局にも寄ります。
  Kana: ぎんこうへいくついでに、ゆうびんきょくにもよります。
  Translation: Since I’m going to the bank, I’ll stop by the post office too.
  Corresponds to Korean 「은행에 가는 김에 우체국에도 들를게요」. Japanese uses the dictionary form 「行く」, while Korean uses 「가는 김에」. In both sentences, going to the bank is the original trip and visiting the post office is the additional plan.
• Example: 部屋を掃除するついでに、古い本も整理しました。
  Kana: へやをそうじするついでに、ふるいほんもせいりしました。
  Translation: While cleaning the room, I also organized the old books.
  Corresponds to Korean 「방을 청소하는 김에 오래된 책도 정리했어요」. Cleaning the room is the main action, while organizing the books is additional work completed by taking advantage of that cleaning session.
• Example: 大阪まで来たついでに、友達にも会ってきました。
  Kana: おおさかまできたついでに、ともだちにもあってきました。
  Translation: Since I had already come all the way to Osaka, I also went to see a friend.
  Corresponds to Korean 「오사카까지 온 김에 친구도 만나고 왔어요」. Japanese uses the た-form 「来た」, while Korean uses the past adnominal form 「온」. Both first treat arriving in Osaka as established and then add meeting a friend to the trip.

◆ Core Differences From 「-는 김에／-(으)ㄴ 김에」:
Japanese 「〜ついでに」 usually maintains a relatively clear main-versus-additional-action relationship, with the second clause describing something done incidentally by taking advantage of the time, location, or movement of the first. Korean 「김에」 can express not only “while you’re at it” but also “since you’re already doing this” or “since you’ve already done this, take the opportunity to…,” so the second clause is not always a merely secondary action. In these Korean sentences, Japanese expressions such as 「せっかくだから」 or 「この機会に」 may sometimes sound more natural than 「〜ついでに」.

Korean 「-는 길에」, meanwhile, mainly describes doing something while going somewhere or returning from somewhere. If the sentence simply describes something happening during movement, Japanese usually uses 「〜途中で」. Only when the route is intentionally used as an opportunity to add another task might 「〜ついでに」 be appropriate.

The real question with 「-는 김에」 is not whether the two actions happen at the same time, but whether the second action is added because the first action created a convenient opportunity. If it happens to rain while you are going to the supermarket, that is not “while you’re at it.” If you buy milk while already going to the supermarket, that is a typical 「-는 김에」 situation.

When you see 「-는 길에」, first check whether the second event happens on the way. With 「-다가」, look for whether the first action was already underway when something changed. With 「-는 김에」, focus on the idea: “Since this is already happening, what else can I take care of at the same time?” All of these may sometimes be translated with similar phrases, but the actual relationships between events in Korean are different.

FAQ

SUPPORT FENGNIII

喜歡這篇文章嗎？

如果這篇內容對你有幫助，可以透過小額贊助支持本站持續整理更多日文、韓文、旅行與數位工具內容。

小額支持本站

付款將由藍新金流安全處理