Exchange Spread Checker
“No commission” doesn’t mean free — the cost hides in the rate. Enter the rate you were offered and the mid-market rate to see what the spread is costing you.
Both rates are KRW per 1 unit of your home currency. Find the mid-market rate in any currency converter, then enter the rate you were actually offered.
| Value at mid-market | 690,000 KRW |
| You receive | 665,000 KRW |
| Your all-in rate | 1,330 KRW |
| Lost vs mid-market | 25,000 KRW · 3.6% |
An estimate from the rate and fees you enter — not a live rate, and nothing is stored. The point: compare the rate you are offered with the mid-market rate; the gap is your real cost.
How it works
How much a quoted exchange rate — plus any fee — costs you compared with the mid-market rate, using the numbers you enter. The gap between the two rates is the “spread,” and that is the real cost of changing money.
The fair midpoint that banks start from before adding their margin (in Korean, 매매기준율). You can read it in any currency converter. How far your offered rate sits from it is what you are paying.
No. You type in both the rate you were offered and the mid-market rate yourself. Nothing is fetched live and nothing you enter is stored — it is an estimate to help you compare.
Yes. Enter the rate the app or kiosk gives you and any fee it shows. It works the same for cash exchange, a prepaid all-in-one card top-up, or a home travel-card conversion.
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Questions visitors ask
Search “USD to KRW” (or your currency) in any search engine or currency-converter app — the unmarked midpoint it shows is the mid-market rate. Compare the rate you were offered against it.
Because the cost is built into the rate (the spread), not a separate fee line. A booth with “no commission” but a wide spread can cost more than one with a small fee and a tighter rate — so compare the actual rate.
It depends on that card’s exchange rate and fees, which you should check on its app or kiosk. Enter them here and compare — no single option is always best, and this tool does not recommend one.