Free tool · official reference rates
Currency converter
Convert between currencies on the European Central Bank's euro reference rates, published each working day, or the Bank of Canada's for any pair with the Canadian dollar. Each result shows the rate, the bank it came from and the day it was published.
Convert
Enter an amount, pick two currencies and select Convert.
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Where the rates come from
Rates are fetched from the bank and reused for up to an hour.
Run it with curl
curl "https://app.superbooks.io/api/tools/currency?from=USD&to=EUR&amount=100"Questions
- Which exchange rate does the converter use?
- The European Central Bank's euro reference rates, published each working day, crossed through the euro for pairs without it. Any pair with the Canadian dollar uses the Bank of Canada's daily exchange rate instead. Every result shows the rate, its source and the date it was published.
- Why is my bank's rate different?
- Reference rates are published for information. Neither central bank deals at them, and a bank or card that converts a payment applies its own rate and usually a fee on top.
- Which rate should I use on an invoice or in my books?
- Whatever rate your tax authority or accountant asks for. Many accept a published central-bank rate for the transaction date, which is why the result shows the date the rate was published.