Currency
Inverse rate
Reversing the direction of a quote takes the reciprocal, and the product of a rate and its inverse is always one.
The Formula
Inverse rate = 1 / rate
Reversing the direction of a quote takes the reciprocal, and the product of a rate and its inverse is always one.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| r | Rate | rate | Units of the target currency per unit of the source. |
What Each Symbol Means
rrate
Rate
Units of the target currency per unit of the source.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert currency page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Convert Currency, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.