IOST converter: turn IOST into yen, won, baht and more

The converter in the hero does one job: it tells you what an amount of IOST is worth in another currency right now, or how much IOST a given amount of money buys. It uses a live reference price, so the result is a fair estimate, not an offer from an exchange. The rest of this page explains how that number is built and why the money that reaches your bank account is usually a little lower.

How the IOST conversion works

Every conversion on this page follows the same chain. The converter takes IOST’s USD price from CoinGecko, which aggregates trades from many exchanges. It then multiplies by a public reference FX rate for your chosen currency. If CoinGecko is unavailable, it falls back to Binance’s IOST/USDT price. The whole calculation runs in your browser.

Written as a formula, the forward direction is: value in local currency = IOST amount × IOST price in USD × local units per USD. The reverse is just as simple: IOST amount = local amount ÷ (IOST price in USD × local units per USD). The swap button in the converter flips between the two. That is all a crypto converter really does. Anything that looks like more precision is just extra decimal places.

Two details are easy to miss. First, IOST trades as a native L1 coin on most Asian exchanges and as a BEP-20 token on BNB Chain. The converter treats them as one asset because the market prices them as one. Second, the reference rate is a mid-market figure. On a real exchange you buy at the ask and sell at the bid, and both sit a little away from the middle.

Worked examples in yen, won, baht, rupiah, dong and more

To show the arithmetic rather than pretend to quote a live price, the table below uses a hypothetical IOST price of $0.001 and round FX rates. These numbers are chosen to make the math easy to follow. They are not current rates. Use the live converter for the real figure, then come back here if you want to check the logic.

The table also hints at something more useful than the math. Only some currencies have a direct IOST market. If you hold yen, won, baht or rupiah, you can sell IOST straight into your own currency. If you hold dong, Taiwan dollars or pesos, the value you see is really a crypto price converted twice. Each extra step has its own spread.

Working backwards is just as common. Say you want to spend ¥10,000 and the yen price of IOST were ¥0.15 in our hypothetical example ($0.001 × 150). Then 10,000 ÷ 0.15 gives about 66,667 IOST before costs. If a broker spread takes 3%, you would get closer to 64,667 IOST. The same logic works for “how many IOST for ₩100,000” or “how many IOST for ฿1,000”.

How fees and spreads change your real proceeds

The converter tells you the value. The exchange decides the price. The gap between the two comes from three things: the spread, the trading fee and any withdrawal fees. How large each one is depends on the kind of venue you use, and in Japan that difference is especially large.

販売所 (broker counter) vs 取引所 (order book)

Japanese exchanges usually offer IOST in two ways. The 販売所 is a broker counter: the exchange is your counterparty and quotes one price to buy and a lower price to sell. There is no separate trading fee, because the spread is the fee. Coincheck officially states its 販売所 spread as 0.1–5.0% of the reference price, and wider for some coins as conditions change. The 取引所 is an order book where you trade with other users. On Coincheck’s IOST/JPY book, the fee is 0.05% for maker orders and 0.10% for taker orders. Its bid-ask spread has been seen at around 1.2%, because the book is thin.

Here is a worked example, using hypothetical numbers. Suppose your IOST has a reference value of ¥10,000. If you sell on a 販売所 and the sell price is 3% under the reference rate, you receive about ¥9,700. If you sell on the 取引所 into a bid about 0.6% under the middle, which is half of a 1.2% spread, and pay the 0.10% taker fee, you receive about ¥9,930. Withdraw the yen from Coincheck and you pay ¥407. That leaves roughly ¥9,523 against ¥9,293. The difference is only a couple of hundred yen here. On a ¥1,000,000 position it becomes tens of thousands of yen. Our Coincheck review covers both screens.

Slippage on thin books

A market order for a large amount of IOST can eat through several price levels on a thin yen or rupiah book. The converter cannot see that. For big trades, use limit orders and split them.

Order books outside Japan

Elsewhere the structure is simpler, but the same rule applies: fee plus spread plus withdrawal cost. On Upbit’s KRW market, the trading fee is reported at 0.05%, and a KRW bank withdrawal costs ₩1,000. Its IOST spread is usually tight, because it is one of the two deepest IOST markets. On Bitkub, the official fee page lists 0.25% for makers and takers, with a minimum order of 10 THB on IOST/THB. Bitkub’s IOST spread has run above 1%. On Binance’s IOST/USDT pair, the standard spot fee is 0.10%. Withdrawing IOST from Binance costs 1 IOST on the native network, which needs a memo, or 29 IOST as BEP-20. If you plan to move coins between exchanges, read our IOST sending guide first.

For the crypto route used in Vietnam and Taiwan, count every hop. You sell IOST for crypto on an offshore exchange and pay its fee and spread. Then you sell that crypto for local money, often on P2P, where the rate can differ from the reference FX rate. Two small spreads add up.

1 IOST = how many yen, won or baht?

These are some of the most searched IOST questions across Asia, in every language. The answer is the converter result with the amount set to 1. Because IOST trades at a small fraction of one yen, 1 IOST usually shows up with three or four decimal places. OKJ’s IOST/JPY order book moves in steps of ¥0.0001. In won, Upbit’s price dropped below one won at the August 2026 low, and in baht the same tiny-number problem appears. Rupiah prices are larger numbers but still small enough that a rounding step matters. Most people find it easier to think in round amounts, such as 10,000 or 1,000,000 IOST, which is why the converter offers those shortcuts.

The flip question, “how many IOST per 1,000 yen”, is often more useful for planning. Divide 1,000 by the yen price of one IOST, then knock off your spread and fee. If you are comparing exchanges, run the same amount through each one’s real bid and ask rather than the reference price.

Then there is the hope behind many of these searches: will IOST reach 1 yen? The converter cannot answer that, but simple math can frame it. At ¥1 per coin, a circulating supply of roughly 36.7 billion IOST would be worth about ¥36.7 billion. That is many times IOST’s market cap for most of its recent history. Our IOST price prediction page tests 1 yen, 10 yen and other targets in detail, and the tokenomics guide explains why the supply number itself is uncertain.

No IOST pair in your currency?

Vietnam, Taiwan and the Philippines have no local IOST market. The common route is to buy crypto first, then trade IOST on an exchange that lists it. A long-running exchange that sells crypto by card can cover the first step.

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Which currencies have a direct IOST market

The converter supports 13 currencies, but only some have a real IOST order book behind them. That affects how close the converter value is to what you can actually get.

Japanese yen. Four FSA-registered exchanges handle IOST: Coincheck, OKJ, BitTrade and Binance Japan. Coincheck and OKJ run IOST/JPY order books, and both are thin. See IOST in Japan. Korean won. Upbit has had a KRW-IOST market since July 2018, and Bithumb and Coinone also list it. Upbit’s book is one of the deepest anywhere. See IOST in South Korea. Thai baht. Bitkub is the only THB venue we found, listed since November 2018. See IOST in Thailand.

Indonesian rupiah. Bittime and Indodax run IOST/IDR, and Tokocrypto lists IOST against crypto only. The rupiah books are small. See IOST in Indonesia. Indian rupee and euro. WazirX has a thin IOST/INR market, and OKX and Bitvavo offer IOST/EUR. Dong, Taiwan dollar and peso. We found no local pair, so the converter value is a crypto price converted to local money. For the full list of venues, see our IOST exchange comparison, and for a complete buying walkthrough, how to buy IOST.

When the converter is off, and why

The converter can disagree with your exchange for honest reasons. The aggregated price leans toward the biggest venues, mainly Binance and Upbit, so a thin local book can sit above or below it. FX rates come from public reference feeds and update more slowly than crypto prices. In a fast market, the converter and your app can be a percent or two apart for a few minutes.

We also built in a safety rule. A quote older than 30 minutes is treated as stale, and if no fresh price is available, the converter pauses rather than showing an old number as live. Prices are cached briefly in your browser session so the page does not hammer the data providers. If you see no result, wait a moment and reload. For the chart and the full price history, head back to the IOST price page.