The SI unit of length is the meter or metre.
meter
the meter (French: metre)
milimeters, centimeters, meters, ect.
A system of measurements
The International System of Units
all you have to find out how much there is in a lenght so the unit would be the amount 12 or 43 any on the calculation
1 meter in the metric system is equal to approximately 39.37 inches.
Metre
lenght
10936
- Lenght - Mass - Time - Current - Temperature - Luminous Intensity - Number of Particles
English.