Currency Conversion Margin Calculator
The hidden spread your bank charges on a transfer.
Enter your values
Enter the amount to send you are working with.
Enter the mid-market rate you are working with.
Enter the rate you were offered you are working with.
Enter the stated fee you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total hidden cost
- 125.60
- Exchange rate margin
- 2.212%
- You receive
- 5,289.09
- At mid-market you'd receive
- 5,425.00
Quick answer
The hidden cost of a currency transfer is the gap between the mid-market rate and the rate you were given, plus any stated fee.
At a glance
| What it does | The hidden spread your bank charges on a transfer. |
|---|---|
| Category | Finance |
| Inputs needed | Amount to send, Mid-market rate, Rate you were offered, Stated fee |
| Main output | Total hidden cost |
| Cost | Free — no sign-up, no download |
How to use the Currency Conversion Margin Calculator
- 1Enter the amount you are sending.
- 2Look up the mid-market rate and enter it.
- 3Enter the rate your provider offered.
Inputs explained
- Amount to send
- Enter the amount to send you are working with.
- Mid-market rate
- Enter the mid-market rate you are working with.
- Rate you were offered
- Enter the rate you were offered you are working with.
- Stated fee
- Enter the stated fee you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Amount to send5000
- Mid-market rate1.0850
- Rate you were offered1.0610
- Stated fee15
Results
- Total hidden cost125.60
- Exchange rate margin2.212%
- You receive5,289.09
- At mid-market you'd receive5,425.00
Frequently asked questions
What is the mid-market rate?
The midpoint between global buy and sell prices — the rate you see on Google or Reuters, with no markup added.
Is a zero-fee transfer really free?
Rarely. Providers advertising no fees usually widen the exchange rate margin instead, which costs more on large amounts.
What do I need to enter into the Currency Conversion Margin Calculator?
Just 4 values: amount to send, mid-market rate, rate you were offered, stated fee. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Currency Conversion Margin Calculator work out the answer?
The hidden cost of a currency transfer is the gap between the mid-market rate and the rate you were given, plus any stated fee. The working is shown step by step so you can verify the result by hand.
Is the Currency Conversion Margin Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.