1 Thai baht = ₩40 on the European Central Bank reference rate for September 28, 2026 — down 2% against the won in 7 days and the lowest rate in 67 days.
For a traveller holding baht, that means 1,000 THB now buys about ₩40,000 — roughly ₩800 less than a week ago — so exchanging everything today locks in the weakest rate of the past two months.
This post covers today’s official rates, how far the baht has fallen, what a day in Seoul costs in baht, and where the exchange actually happens best.
What Is the THB to KRW Rate Today?
| ECB reference rate (no fee, indicative) | ₩40 |
|---|---|
| Korea Eximbank mid rate | ₩40 |
| Korea Eximbank wire buy (TTS) — rate travellers pay buying baht | ₩41 |
| Korea Eximbank wire sell (TTB) — rate travellers get selling baht | ₩40 |
Per the ECB reference rate read on September 28, 2026, 1 THB = ₩40, down 2% against the won over the past 7 days.
Korea Eximbank’s rates for the same day show ₩40 per 1 THB at the mid rate, ₩41 at the wire buy (TTS) rate, and ₩40 at the wire sell (TTB) rate.
The three numbers sit side by side in the table, and they are not the same thing — the reference rate is a no-fee midpoint, while TTS and TTB are the rates that apply when money actually moves.
Also worth knowing: the ECB reference rate carries no cash-exchange fee, so a real counter or kiosk always quotes slightly less favorable numbers.
Before any baht-to-won decision, the first thing to check is the date on the number — a rate without its date is useless for planning, and koreankorea.com rebuilds a THB→KRW page every morning with the ECB rate and Korean bank buy/sell rates.
If a quote has no date attached, treat it as stale and refresh before exchanging.
Is Now a Good Time to Exchange Baht for Won?
No — not all at once.
The baht sits at its 67-day low of ₩40, so a full exchange today locks in the fewest won per baht of the past two months.
Over the past 67 days the THB/KRW rate swung between ₩47 and ₩40 — about an 18% range — and today’s ₩40 sits at the bottom of that window.
Waiting has recently been rewarded, since the rate fell from ₩47 to ₩40, but an 18% two-month swing cuts both ways and can move back in either direction.
Cash counters and kiosks also add roughly a 1–2% fee on top of the base rate, so budget for the counter rate, not the ₩40 figure.
If I were holding baht now, I would exchange only half at the current ₩40 rate and keep the rest for the trip — the rate moved 18% in two months, and splitting spreads the timing risk.
How Much Did the Baht Fall This Week?
About ₩800 less per 1,000 THB in one week: 1,000 THB bought roughly ₩40,800 last week and buys about ₩40,000 today.
The decline is not a one-week story — 1 THB stood at ₩42.61 on August 14, ₩41.29 on September 1, and ₩40 on September 28.
At the August rate, ₩100,000 bought about 2,346.70 THB; at today’s ₩40 rate the same ₩100,000 buys about 2,500 THB.
For a baht holder, the direction matters more than any single day — the rate has been sliding toward ₩40 since mid-August.
A budgeted trip in baht can re-do the math with the ₩40 shortcut below; last month’s won-based numbers overstate what 1,000 THB still buys.
What Does a Day in Seoul Cost in Thai Baht?
At ₩40 per baht, multiply THB by 40 for an instant won estimate — 100 THB ≈ ₩4,000 and 1,000 THB ≈ ₩40,000.
| Thai baht | Korean won (≈) |
|---|---|
| 50 THB | ₩2,000 |
| 100 THB | ₩4,000 |
| 500 THB | ₩20,000 |
| 1,000 THB | ₩40,000 |
For a rough Seoul day — a couple of subway rides, lunch, dinner, and one cafe — the cost estimate lands at about ₩35,000–45,000, which is roughly 875–1,125 THB at today’s rate.
The THB conversions of Seoul-side prices are estimates, not confirmed figures, so treat them as a starting band rather than a price list.
A cafe Americano runs about ₩4,500–5,500, and a casual restaurant meal in Seoul is commonly around ₩10,000–15,000.
If your Seoul costs stay under about 1,100 THB a day, the 7-day move cost you less than one meal — the bigger fee to watch is the exchange spread, not the rate itself.
Should You Exchange Baht in Bangkok or in Korea?
Wait and exchange after arriving in Korea — Korean bank counters and Myeongdong/Dongdaemun booths stock THB, while Bangkok counters selling won often give a less favorable rate because the won is a minor currency there; check the counter’s posted rate before changing anything in Bangkok.
| Where | What to expect |
|---|---|
| Bangkok counters (airport, SuperRich) | Selling KRW is a minor-currency trade — often a worse rate; compare the posted rate first |
| Incheon Airport banks and kiosks | THB exchanged on the spot, but spreads run roughly 1–2% worse than the mid rate |
| Myeongdong / Dongdaemun booths | Tighter spreads than the airport; many booths stay open into the evening and on weekends, while bank counters close around 16:00 on weekdays |
| Card payment in Korea | Overseas card settlement runs about 2.5%; GLN QR payment costs about 1.5% and works in Hana/KB/K-bank apps at stores and restaurants |
When a Korean card terminal shows the amount in won on the screen, that is DCC — decline it and choose THB or "without conversion."
Night market stalls and taxis still need cash, so carry some won regardless of which option you pick.
If most of the trip is card-friendly Seoul — convenience stores, restaurants, malls — the ~1.5% GLN QR route or plain card payment can beat kiosk exchange; if the trip leans on markets and taxis, cash booths matter more.
Related posts
📎 Seoul — everything we know
📎 📅 Upcoming Dates — Release & Event Calendar
Sources
- THB exchangeable at Korean banks and Myeongdong booths (koreankorea.com)
- Bank mid rate (koreaexim.go.kr)
- Cash exchange spread (vibe-coding.ai.kr)
Summary: THB to KRW today
- 1 THB = ₩40 (ECB reference rate, September 28, 2026) — the lowest in 67 days, down 2% in a week.
- 1,000 THB now buys about ₩40,000, roughly ₩800 less than a week ago.
- The rate sits at the bottom of the ₩40–47 range seen over the past 67 days, so recheck the morning rate before exchanging.
- Exchange in Korea, not Bangkok; city booths beat the airport spread, and real counters add 1–2% over the mid rate.
- Decline won-denominated DCC on card terminals — choose THB or "without conversion".
FAQ
Q. Is 1 baht still worth about 40 won?
Yes — 1 THB = ₩40 on the ECB reference rate for September 28, 2026, which is also the 67-day low.
Q. Should I exchange baht now or after arriving in Korea?
After arriving is usually the better trade — Korean booths and bank counters stock THB, while Bangkok counters selling won often quote a worse rate because the won is a minor currency there.
Q. Is now a good time to exchange Thai baht for Korean won?
Not all at once. The rate is at its 67-day low of ₩40, so exchanging everything now locks in the weakest rate of two months — splitting half now and half later spreads the timing risk.
Q. How many won is 1,000 baht?
About ₩40,000 at the September 28, 2026 rate of ₩40 per baht — and about ₩40,800 at last week’s rate of roughly ₩40.8.
Check today’s THB to KRW rate on koreankorea.com before you fly — it refreshes every morning with the ECB rate and Korean bank buy/sell prices.
Cover photo: Currency exchange counter at ZBAA T3E Departures (20180823110519) by N509FZ — CC BY-SA 4.0
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