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Currency Converter

Enter the amount, the currency codes and the exchange rate, plus any percentage fee charged by your bank or card. The calculator shows the converted amount, the inverse rate, the fee and the effective rate you actually get. Converting 100 USD at 0.9 EUR per dollar with a 3% fee gives 87.30 EUR, an effective rate of 0.873.

Your numbers

Enter the rate your bank or provider offers. We don't fetch live rates.

Percentage fee or spread charged by the provider.

Results

You receive

90 EUR

Inverse rate
1 EUR = 1.111111 USD
Fee
0 USD
Effective rate after fees
1 USD = 0.9 EUR

Rates change constantly; check the rate at the moment you convert.

Show the working
  1. Conversion(100 − 0) × 0.9 = 90
Paper and orientation

How to use the currency converter

  1. Enter the amount to convert.
  2. Enter the from and to currency codes, such as USD and EUR.
  3. Enter the exchange rate: how many units of the target currency one unit of the source currency buys.
  4. Enter any fee as a percentage.
  5. Read the converted amount, the inverse rate, the fee and the effective rate.

How it works

  • Fee = amount × fee %.
  • Converted amount = (amount − fee) × rate.
  • Inverse rate = 1 ÷ rate.
  • Effective rate = converted amount ÷ amount.

Worked example

Converting 100 USD at 0.9 EUR per USD:

  • With no fee: 90.00 EUR.
  • With a 3% fee: the fee is 3.00 USD, so 97.00 USD is converted, giving 87.30 EUR.
  • Effective rate: 0.873 EUR per USD, about 3% worse than the quoted rate.

Comparing exchange options

Different providers quote different rates and fees. To compare, put each provider’s rate and fee into the calculator and look at the converted amount. A provider with no fee but a poor rate can cost more than one with a small fee and a good rate. The effective rate captures both.

Tips

  • Check the mid-market rate as a benchmark.
  • Watch for hidden margins in “no-fee” exchanges.
  • Card foreign transaction fees often add a percentage to purchases abroad.
  • Large transfers may qualify for better rates; ask.
  • Rates move constantly; the rate at the moment of the transaction is what counts.

Why there are no live rates

Live exchange rates need a data feed, and the rate you get always depends on your provider. Rather than show a rate that may not match yours, this converter lets you enter the exact rate you’re quoted. That keeps the result accurate for your situation and works offline.

Using the converter for business

When you invoice clients in another currency, the amount you receive depends on the rate on the day of payment and any bank fees. Use the converter to estimate what an invoice is worth in your own currency, and add a margin for rate changes if payment terms are long.

Limitations

The calculator uses one rate and one percentage fee. Fixed fees, tiered pricing and rate changes between quote and payment are not modelled.

Frequently asked questions

Where does the exchange rate come from?

You enter it. This converter doesn’t fetch live rates, so you control which rate is used: the rate your bank quotes, a card network rate or a reference rate.

What is the inverse rate?

The rate the other way round: 1 ÷ rate. If 1 USD = 0.9 EUR, then 1 EUR = 1.111111 USD.

How are fees included?

The fee is a percentage of the amount you convert, deducted before conversion. The effective rate shows what you actually receive per unit after the fee.

Why is the rate I get worse than the one online?

Banks and exchange services often add a margin to the mid-market rate and may charge a fee. Comparing the effective rate shows the full cost.

Should I pay in my own currency abroad?

When a card terminal offers to charge you in your home currency, the conversion rate it uses can be less favourable than your card issuer’s. Compare the offered rate with your card’s rate before accepting.

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