Conversion library
Length Conversion Calculators
Choose a calculator for metric, imperial, typography, or screen measurements. Every page includes the formula, live calculation steps, and a common-values table.
All converters
Centimeters to Feetcm to ftCentimeters to Feet and Inchescm to ftCentimeters to Inchescm to inCentimeters to Millimeterscm to mmFeet and Inches to Centimetersft to cmFeet to Centimetersft to cmFeet to Inchesft to inFeet to Metersft to mFeet to Millimetersft to mmHeight Converterft to cmInches to Centimetersin to cmInches to Feetin to ftInches to Metersin to mInches to Millimetersin to mmInches to Pointsin to ptKilometers to Mileskm to miMeters to Feetm to ftMeters to Inchesm to inMiles to Kilometersmi to kmMillimeters to Centimetersmm to cmMillimeters to Feetmm to ftMillimeters to Pixelsmm to px
How these length conversions work
Every calculator converts the source value to a shared base measurement, then converts that measurement to the selected target unit. Exact definitions such as 1 inch = 25.4 millimeters are used wherever they apply.
For the main conversion, use the millimeters to inches converter. For reverse calculations, use inches to millimeters.