Measurement Category Hub

Length & Distance Converters & Calculators

Convert between metric and imperial distances including millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles. Use our universal interactive length & distance calculator below or select one of our dedicated conversion shortcuts.

Length & Distance
(mm)
Example: 25 mm
(cm)
e.g. 2.5cm
Standard: 1 cm = 0.01 m = 10 mm

Enter any number above to convert Millimeters to Centimeters. Click (i) for brief unit info.

Supported Length & Distance Units & Standards

Unit NameSymbolType / SystemRelative Value
Millimeter
mmDerived Unit1 mm = 0.001 base
Centimeter
cmDerived Unit1 cm = 0.01 base
MeterBase SI
mSI Standard Unit1 m = 1 base
Kilometer
kmDerived Unit1 km = 1000 base
Inch
inDerived Unit1 in = 0.0254 base
Foot
ftDerived Unit1 ft = 0.3048 base
Yard
ydDerived Unit1 yd = 0.9144 base
Mile
miDerived Unit1 mi = 1609.344 base
Nautical Mile
NMDerived Unit1 NM = 1852 base

Length & Distance FAQs

In the International System of Units (SI) or standard physical conventions, the base reference unit is Meter. All linear conversions within this category are mathematically derived from this base factor.