FX Cost Calculator
Enter your currency pair and monthly spending to see how much exchange rate movements cost or saved you over the past 12 months.
Frequently asked questions
How is the FX cost calculated?
We fetch 12 months of daily exchange rates from the European Central Bank, compute the average rate for each month, and compare each month's rate to the 12-month average. The difference — applied to your monthly spending — shows how much currency fluctuations cost or saved you.
What exchange rates does this use?
This calculator uses ECB (European Central Bank) reference rates, updated every business day. The rates are sourced via the Frankfurter API, a free and open-source exchange rate service.
How can I reduce my FX costs?
Time your larger currency conversions when rates are favorable, use multi-currency accounts (like Wise or Revolut) to hold money in the spending currency, and track your FX impact with a budgeting tool like Tallyroot so you know when rates are working for or against you.
What is the hidden cost of living in two currencies?
Every time you earn in one currency and spend in another, exchange rate movements silently raise or lower your real cost of living. Even small daily fluctuations compound over months. Read more in our deep-dive: The Hidden Cost of Living in Two Currencies .