Rates

An exchange rate with its source and a proof you can check without us.

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1 unit of
in

No publication on that date? You get the latest earlier one from the same source, clearly marked. Averages: pick any date inside the year or month.

1 unit of
in

Fetched from the venue when you ask: last trade, best bid and ask. Now: Hyperliquid spot, BTC, ETH, USDT and USDC.

Over a period

The official rate for every day of up to a year: a chart, the daily values and a CSV file. Which publishers and currencies are here: the list of sources.

Rate over a period All sources (82 tables)

Average rates

Yearly and monthly averages as the publishers print them: pick a year and a currency, convert an amount.

IRS yearly average exchange rates HMRC exchange rates: monthly and yearly averages Bank of Canada average exchange rates ECB average exchange rates

The same requests work through the API. For AI agents: alsok.org/llms.txt.

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