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doomath Calculator

Currency Exchange Fee & FX Spread Calculator

Calculate hidden bank markups, wire fees, and FX spreads. Compare real mid-market rates against offered bank rates.

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Provider Benchmarks & Channel Archetypes
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FX Transaction Parameters

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Real
Offered
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Updating reference rate…
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Conversion Loss Analysis

Net Amount Received5,310.00 EURPost-fee conversion value
Total Exchange Loss-190.00Hidden markup + Fixed fees

Transaction Allocation

Mid-Market Value:5,500.00 EUR
FX Spread Markup (3.00%):-165.00 EUR
Fixed Bank Fees:-25.00 EUR
Effective Exchange Rate:1.0620
Effective Fee Rate3.45%

You are losing 3.5% of your money to conversion costs.

Calculator guide

How to use the Currency Exchange Fee Calculator

Calculate exchange fees, effective exchange rates and the real cost of converting currencies.

01Set inputsChoose values, units and assumptions.
02Apply the modelFX markup = Mid-market value − Offered-rate value. Total conversion cost = FX markup + fixed fees.
03Read the resultCheck the output against the assumptions before using it.
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What this calculator does

Enter the amount being converted, the mid-market reference rate, the provider’s offered rate and any fixed fee. The calculator estimates the value lost to the rate spread and explicit charges.

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Formula & method

FX markup = Mid-market value − Offered-rate value. Total conversion cost = FX markup + fixed fees.

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Assumptions & notes

  • The direction of the exchange rate matters: both rates must quote the same source and target currencies.
  • The model treats the difference between reference and offered rates as an exchange markup.
  • Provider pricing can vary by amount, corridor and payment method.
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