MoneyMaths.
Money decisions, made clearer

Currency converter with a custom exchange rate

Enter a quoted exchange rate and see the conversion. This tool does not fetch live rates.

No account needed · Financial inputs are calculated in your browser · User-supplied rate required

Your numbers

Fees and exchange margins are excluded. Use the final rate quoted by your provider.

Results update as you type. Empty or invalid fields stop the calculation.

Saving is optional. Anyone using this browser profile may be able to load it.

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Understand the assumptions

These are estimates from the values you enter. Review the assumptions in your report and check the actual terms before making a financial commitment.

How this calculator works

Convert an amount with a rate you already have from a bank, exchange service or quote. This tool does not retrieve live market rates.

How to enter the rate

The rate is the number of destination-currency units received for one unit of the source currency. If a hypothetical quote is 0.90 destination units per source unit, entering 100 gives 90 before any charges. That number is an illustration, not a current quote.

Why could the amount received be different?

A provider may deduct a fixed fee, apply a different rate or add other charges. Compare the provider’s final amount received against this reference. A quote date records the date you enter; it does not verify or refresh the rate.

Can I reverse a quote?

Mathematically, the reciprocal is 1 divided by the rate. A provider’s reverse transaction may use a different buy or sell rate. For the same source and destination currency, use a rate of 1.

Read the currency calculation assumptions.