Convert between metric length units instantly
Convert km to m for distances and measurements
Convert m to km for road distances and geography
Convert m to cm for height and smaller measurements
Convert cm to m for construction and tailoring
Convert cm to mm for precision measurements
Convert mm to cm for engineering drawings
Convert m to mm for detailed technical work
Convert km to cm for large-scale conversions
Length is one of the seven SI base quantities. The meter (m) is the SI unit of length, originally defined as one ten-millionth of the distance from the equator to the North Pole. Today, it's defined by the speed of light in vacuum.
The metric system makes length conversions simple through its decimal structure. Moving between units only requires multiplying or dividing by powers of 10. For example, 1 meter equals exactly 100 centimeters or 1,000 millimeters.