FreeByte

Currency conversion fee calculator

The spread hidden in a exchange rate.

Built and reviewed by Dovanic, Founder and editor, FreeByteLast reviewed: 2026-08-18
$
1%

True cost

$74.55

Hidden spread

2.73%

With these inputs, true cost comes to $74.55. Hidden spread works out to 2.73%. The result assumes mid-market rate stays at 1.1%.

You receive
2,140.00
At mid-market
2,200.00

What moves the number · True cost

Input−10%Now+10%
Amount to convert$67.09$74.55$82
Mid-market rate-$141.62$74.55$251.4
Rate offered$269.09$74.55-$120
Explicit fee$72.55$74.55$76.55

Solve for an input

Whatmakesequal

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Save this set of inputs, change something, then save again to compare the outcomes side by side.

The spread hidden in a exchange rate.

A worked example

Starting figures

Amount to convert
$2,000
Mid-market rate
1.1
Rate offered
1.07
Explicit fee
1%

What it returns

True cost
$74.55
Hidden spread
2.73%
You receive
2,140.00
At mid-market
2,200.00

How to read the results

With the defaults above, true cost works out at $74.55.

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