Last updated: September 2026

Conversion Pair Library

Every dedicated conversion page on OmniUnit — each with the exact formula, a common-value reference table, and a reverse conversion. Pick a pair to jump straight to its calculator.

Length conversions

Meters to Feetm → ft Feet to Metersft → m Inches to Centimetersin → cm Centimeters to Inchescm → in Miles to Kilometersmi → km Kilometers to Mileskm → mi Yards to Metersyd → m Meters to Yardsm → yd Millimeters to Inchesmm → in Inches to Millimetersin → mm Kilometers to Feetkm → ft Feet to Kilometersft → km Feet to Centimetersft → cm Centimeters to Feetcm → ft

Weight conversions

Kilograms to Poundskg → lb Pounds to Kilogramslb → kg Ounces to Gramsoz → g Grams to Ouncesg → oz Pounds to Ounceslb → oz Ounces to Poundsoz → lb Tonnes to Poundst → lb Pounds to Tonneslb → t

Temperature conversions

Celsius to Fahrenheit°C → °F Fahrenheit to Celsius°F → °C Celsius to Kelvin°C → K Kelvin to CelsiusK → °C Fahrenheit to Kelvin°F → K Kelvin to FahrenheitK → °F

Speed conversions

Miles per Hour to Kilometers per Hourmph → km/h Kilometers per Hour to Miles per Hourkm/h → mph Knots to Kilometers per Hourkn → km/h Kilometers per Hour to Knotskm/h → kn Meters per Second to Miles per Hourm/s → mph Miles per Hour to Meters per Secondmph → m/s

Volume conversions

Liters to US GallonsL → gal US Gallons to Litersgal → L Milliliters to US Fluid OuncesmL → fl oz US Fluid Ounces to Millilitersfl oz → mL US Cups to Milliliterscup → mL Milliliters to US CupsmL → cup US Quarts to Litersqt → L Liters to US QuartsL → qt

Area conversions

Acres to Square Feetac → ft² Square Feet to Acresft² → ac Square Meters to Square Feetm² → ft² Square Feet to Square Metersft² → m²

Digital Storage conversions

Gigabytes to MegabytesGB → MB Megabytes to GigabytesMB → GB Gibibytes to MebibytesGiB → MiB Mebibytes to GibibytesMiB → GiB