CPM Calculator

### RPM to kMH Conversion Calculator:

Speed of the motor in v_{(kMH)} in kilo meter per hour is equal to 0.1885 times of the speed **N _{(RPM)}** multiply by diameter D

_{(m)}in meter. The formula for converting Rpm to kmh can be written as,

Vehicle speed = 0.1885 * Wheels RPM * diameter of the tire.

v_{(kMH)} = 0.1885 * N_{(RPM)} * D_{(m)}

Look at this formula, the speed is directly proportional to the rpm and the diameter of the driving mechanism.

__Example:__

Let us calculate the rpm to kmh of the car; the 250 mm diameter of the tire is rotating at 980 revolution per minute.

Apply our formula,

Speed of the car in kMH = 0.1885 * 980 * 0.25 = 43.2 kmph.