About AllUnits

AllUnits is a free collection of unit converters. Every page shows the exact conversion factor, a full conversion table and the conventions behind the units - no signup, and no ads covering the calculator.

All Conversion Categories

Length & Distance

km → mi m → ft mi → km cm → in mm → in yd → m ft → cm

Temperature

°F → °C °C → °F

Weight & Mass

kg → lb lb → kg g → oz oz → g

Pressure

psi → bar bar → psi bar → kPa psi → kPa

Data & Storage

MB → GB KB → MB GB → TB

Volume & Capacity

L → gal mL → fl oz cup → mL fl oz → mL

Speed

mph → km/h kn → mph

Time

h → min d → h

Area

m² → ft² ha → ac