Unit Conversion Calculators
Length, weight, temperature, volume, area, speed, data and time converters.
15 free unit conversion calculators — no signup, mobile-friendly, formulas verified by our editorial team.
Featured unit conversion calculators
Data Storage Converter (Bytes to TB)
Convert bytes, KB, MB, GB and TB in both decimal and binary units.
Fahrenheit to Celsius Converter
Convert F to C and C to F for weather, fever and oven temperatures.
Inches to Centimeters Converter
Convert inches to centimeters and back with an exact 2.54 factor.
Miles to Kilometers Converter
Convert miles to kilometers and back, including 5K and marathon distances.
Pounds to Kilograms Converter
Convert lbs to kg and kg to lbs with the exact avoirdupois factor.
All unit conversion calculators
Data Storage Converter (Bytes to TB)
Convert bytes, KB, MB, GB and TB in both decimal and binary units.
Fahrenheit to Celsius Converter
Convert F to C and C to F for weather, fever and oven temperatures.
Inches to Centimeters Converter
Convert inches to centimeters and back with an exact 2.54 factor.
Miles to Kilometers Converter
Convert miles to kilometers and back, including 5K and marathon distances.
Pounds to Kilograms Converter
Convert lbs to kg and kg to lbs with the exact avoirdupois factor.
Celsius to Kelvin Converter
Convert Celsius to Kelvin and back for chemistry and gas law problems.
Cups to Milliliters Converter
Convert US cups to mL and back for recipes and baking measurements.
Feet to Meters Converter
Convert feet to meters and meters to feet for height, rooms and lots.
Gallons to Liters Converter
Convert US gallons to liters and back for fuel, water and tank volumes.
Minutes to Hours Converter
Convert minutes to decimal hours for payroll, timesheets and billing.
MPG to L/100km Converter
Convert US MPG to L/100 km, km/L and imperial MPG for any vehicle.
MPH to KM/H Converter
Convert mph to km/h and back for speed limits, running and cycling.
Ounces to Grams Converter
Convert ounces to grams for recipes, baking and shipping weights.
Seconds to Minutes Converter
Convert seconds to minutes, hours and hh:mm:ss timer format.
Square Feet to Square Meters Converter
Convert sq ft to m2 and back for homes, leases, flooring and paint.
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Celsius to Kelvin Converter
Convert Celsius to Kelvin and back for chemistry and gas law problems.
Cups to Milliliters Converter
Convert US cups to mL and back for recipes and baking measurements.
Feet to Meters Converter
Convert feet to meters and meters to feet for height, rooms and lots.
Gallons to Liters Converter
Convert US gallons to liters and back for fuel, water and tank volumes.
Minutes to Hours Converter
Convert minutes to decimal hours for payroll, timesheets and billing.
MPG to L/100km Converter
Convert US MPG to L/100 km, km/L and imperial MPG for any vehicle.
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Official Sources & References
The formulas, rates and definitions used by this calculator are aligned with the following official sources:
- NIST — Guide for the Use of the SI — Official unit-conversion factors.
- BIPM — SI Brochure — Internationally recognised unit definitions.
We use only primary sources — regulators, standards bodies and scheme operators. See our full sourcing policy for details. Sources & References Policy · Calculator Methodology · How We Verify Formulas