Length
Kilometers back to miles
Divide by the same factor, or multiply by its inverse. Never multiply by 1.609344 here.
The Formula
mi = km / 1.609344 = km x 0.62137119
Divide by the same factor, or multiply by its inverse. Never multiply by 1.609344 here.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| km | Distance in kilometers | kilometers | The quantity you are converting away from. |
| 0.62137119 | Miles per kilometer | mi per km | The reciprocal of 1.609344, to nine significant figures. |
| mi | Distance in statute miles | miles | Smaller than the kilometer figure, which is the sanity check. |
What Each Symbol Means
kmkilometers
Distance in kilometers
The quantity you are converting away from.
0.62137119mi per km
Miles per kilometer
The reciprocal of 1.609344, to nine significant figures.
mimiles
Distance in statute miles
Smaller than the kilometer figure, which is the sanity check.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert miles to kilometers 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 Miles To Kilometers, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.