mm/s to km/h Converter - Millimeter per Second to Kilometer per Hour

Conversion derivation

Express both mm/s and km/h in the same base unit m/s (meter per second), then cancel the shared base unit.

1. 1

   Rewrite mm/s in the base unit

   $$1mm/s=0.001m/s$$
2. 2

   Rewrite km/h in the base unit

   $$1km/h=0.277778m/s$$
3. 3

   Forward conversion

   $$\begin{array}{rl}1mm/s& =\frac{0.001\cancel{m/s}}{0.277778\cancel{m/s}}\times 1km/h\\ & =\frac{0.001}{0.277778}km/h\\ & =0.00359999712km/h\end{array}$$
4. 4

   Reverse conversion

   $$\begin{array}{rl}1km/h& =\frac{0.277778\cancel{m/s}}{0.001\cancel{m/s}}\times 1mm/s\\ & =\frac{0.277778}{0.001}mm/s\\ & =277.778mm/s\end{array}$$