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Currency Cross Rate Calculator

Enter A/B and A/C exchange rates to derive the implied B/C cross rate and inverse.

Shared base A

Currency B

Currency C

A/B rate

A/C rate

Implied B/C cross rate

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—Inverse C/B

B/C = (A/C) ÷ (A/B)

Core conversion workflows

Start with a broad dimension converter or jump to the most common metric/imperial pairs. Specialist converters remain available from the full hub.

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Derive a cross rate from a shared base

If you know A/B and A/C, the implied B/C rate is (A/C) divided by (A/B). The tool also shows the inverse C/B rate.

Keep quote direction consistent

Both entered rates must use the same base currency A and quote units per one unit of A. Mixing inverse conventions produces the wrong cross rate.