Meter
Kilometer
Centimeter
Decimeter
Micrometer
Millimeter
Nanometer
Inch
Mile
Yard
Feet
Meter
Kilometer
Centimeter
Decimeter
Micrometer
Millimeter
Nanometer
Inch
Mile
Yard
Feet

Metric measurements

A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. The most common units in modern use are the metric units, used in every country globally. A meter has been officially defined to be the distance traveled by light in a vacuum in 1/299,792,458 second. All other length and distance measurements in the metric system derive from the meter (eg. km= 1000m, 1m= 1000mm).