The method
How it is worked out
Margin % = 1 − quoted ÷ mid-market; cost = amount × mid − (amount − fee) × quoted
- mid-market
- The rate with no margin; what banks trade at
- quoted
- What you actually get per unit
Exchange Rate Margin Calculator
Find the hidden margin in a quoted exchange rate and what it costs you in money. The result updates as you type so you can compare scenarios quickly.
Keep in mind
What it leaves out
- Receiving feesSome banks charge to receive; not counted here.
- Rate movesBoth rates move; compare quotes taken at the same time.
Use the calculator to compare scenarios rather than as a guaranteed forecast.
About the Exchange Rate Margin Calculator
Find out what an exchange rate quote is really charging you. Enter the mid-market rate and the rate you were offered and the tool turns the difference into a percentage and a cash cost.
How it works and an example to tryShow less
How to use the result
The margin is one minus the quoted rate divided by the mid-market rate. Cost is the amount at mid-market less what you actually receive after any fixed fee.
Example to try
Converting £10,000 at a quoted 1.238 when the mid-market rate is 1.27 hides a 2.5% margin: about £320 on the transfer.
Put it to work
Try it on a real situation
Load an example
What moves the result most
Worked out from your figures above. Tap a row to try it.
Who uses it, and when
Anyone sending money abroad, paying an overseas supplier or comparing a bank with a specialist provider.
Mistakes worth avoiding
- Comparing the fee alone and ignoring the rate, where most of the cost sits.
- Using yesterday's mid-market rate against today's quote.
- Forgetting the receiving bank may charge as well.
Questions
What does the Exchange Rate Margin Calculator do?
Find the hidden margin in a quoted exchange rate and what it costs you in money.
How should I use the result?
The margin is one minus the quoted rate divided by the mid-market rate. Cost is the amount at mid-market less what you actually receive after any fixed fee.
Does TechBullion store the information I enter?
The core calculation or transformation runs in your browser. Normal website security and analytics may still record page-level events, but the tool does not need to create a public record from your inputs.
What mistakes do people make with an exchange rate margin calculator?
Comparing the fee alone and ignoring the rate, where most of the cost sits. Using yesterday's mid-market rate against today's quote. Forgetting the receiving bank may charge as well.
Is the result guaranteed?
No. Use the result as a practical check or planning aid and verify important decisions with the relevant primary source, provider or professional advice.
Executive Insights
Leaders on this topic
Executive insightBuilding a Chain of Trust: An Interview with Alexander Belanov, Founder & CEO of BLAGOCHAIN, on Making Charitable Giving ProvableExecutive insightDmitrii Kochetov on how the role of QA engineer is changing with automation implementationExecutive insightShane Morand on AI Avatars: Why MLM Leaders Keep Paying for AI and Getting Nothing Back
Results are estimates based on the figures entered, for general information only, and not financial, investment, tax or legal advice. See our terms of use.