Forex Currency Conversion Calculator

Convert a trade amount between currencies at a rate you supply, including exchange margin — for sizing forex positions, not everyday spending.

Please note: Forex trading carries a high risk of loss, amplified by leverage. Exchange rates must be entered manually — no live market data is used.

What the Forex Currency Conversion Calculator does

Currency conversion multiplies by the exchange rate, but the rate you get is rarely the mid-market rate. Providers add a margin, sometimes alongside a fixed fee, and the margin is usually the larger cost.

Formula

Mid-market = Amount × Rate
Effective rate = Rate × (1 − Margin)
Received = Amount × Effective rate − Fee

Inputs explained

Input	Unit	Required	Notes
Amount	number	Yes	Accepts more than 0.
Exchange rate	number	Yes	How many units of the target currency one unit of the source buys. Accepts more than 0.
Exchange margin / markup	%	Optional	The spread your bank or provider adds.
Fixed fee	$	Optional	Accepts 0 or more.
Direction	one of 2 options	Yes	—

How to use it

Choose Direction.
Enter Amount and Exchange rate.
Optionally add Exchange margin / markup and Fixed fee.
Select Calculate.

Worked example

Converting 1,000 units at a rate of 1.0850 with a 2% margin and a 5-unit fee.

Amount: 1000
Rate: 1.0850
Margin: 2
Fee: 5

Mid-market 1,085.00, but you receive 1,058.30 — a total cost of 26.70, about 2.46%.

Frequently asked questions

What is the mid-market rate?

The midpoint between the global buy and sell prices — the rate you see on financial sites. Consumers rarely get it; the gap is the provider's margin.

How do I compare providers fairly?

Ignore the advertised fee and compare the final amount received. That single number captures both the margin and the fee.