Skip to main content
Back to Tools

Average Exchange Rate Calculator

Bought euros or dollars in several goes? Enter each purchase and each time you spent some, and see your average purchase rate and how much you've gained or lost on the rate.

What did your foreign currency cost you?
Enter every purchase, and every time you spent or changed money back, in date order. Nothing you type is saved.
Purchases and spending

In date order. For a purchase, enter what you paid as it shows on your bank statement, fees included. For spending, enter that day's rate, for example the ECB's or your central bank's.

Use an official reference rate, always from the same source. To see what your bank would give you back, use its buying rate.

Your average rate and result

Enter at least one purchase to see your average purchase rate.

Average purchase rate = what the money you hold cost ÷ how much you hold. Each purchase moves it; spending doesn't. Realised = amount spent × (that day's rate − average). On paper = amount held × (today's rate − average).

Your entries stay in this browser and are not saved. The ECB button sends only today's date and the two currency codes to our server, which asks the ECB. For tracking, not for a tax return.

How to get an honest average

  1. Take the amounts from your bank statement: what you actually paid, fees included, not the rate on the exchange board.
  2. Keep the order. Spending doesn't change the average, but a purchase after it does.
  3. Take today's rate from the same source every time you check. The paper part moves with it; the realised part stays.

A worked example with four purchases and a holiday: Currency gain or loss on your euros: a worked example

Holding money in more than one currency? Track it in one total, privately on your phone. See Volora's multi-currency net worth tracker

Guides on this topic