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Unit conversion tools

Convert length, weight, and temperature between metric and imperial units — feet to centimeters, kilograms to pounds, Celsius to Fahrenheit, and many more. Each converter is instant and two-way, and shows the exact formula plus a reference table for common values. Everything runs in your browser.

28 tools · free · no sign-up

Feet to Centimeters

Convert feet (ft) to centimeters (cm).

Centimeters to Feet

Convert centimeters (cm) to feet (ft).

Feet to Meters

Convert feet (ft) to meters (m).

Meters to Feet

Convert meters (m) to feet (ft).

Centimeters to Inches

Convert centimeters (cm) to inches (in).

Inches to Centimeters

Convert inches (in) to centimeters (cm).

Millimeters to Inches

Convert millimeters (mm) to inches (in).

Inches to Millimeters

Convert inches (in) to millimeters (mm).

Kilometers to Miles

Convert kilometers (km) to miles (mi).

Miles to Kilometers

Convert miles (mi) to kilometers (km).

Meters to Yards

Convert meters (m) to yards (yd).

Yards to Meters

Convert yards (yd) to meters (m).

Feet to Inches

Convert feet (ft) to inches (in).

Inches to Feet

Convert inches (in) to feet (ft).

Kilograms to Pounds

Convert kilograms (kg) to pounds (lb).

Pounds to Kilograms

Convert pounds (lb) to kilograms (kg).

Grams to Ounces

Convert grams (g) to ounces (oz).

Ounces to Grams

Convert ounces (oz) to grams (g).

Kilograms to Stone

Convert kilograms (kg) to stone (st).

Stone to Kilograms

Convert stone (st) to kilograms (kg).

Pounds to Ounces

Convert pounds (lb) to ounces (oz).

Ounces to Pounds

Convert ounces (oz) to pounds (lb).

Celsius to Fahrenheit

Convert degrees Celsius (°C) to degrees Fahrenheit (°F).

Fahrenheit to Celsius

Convert degrees Fahrenheit (°F) to degrees Celsius (°C).

Celsius to Kelvin

Convert degrees Celsius (°C) to kelvin (K).

Kelvin to Celsius

Convert kelvin (K) to degrees Celsius (°C).

Fahrenheit to Kelvin

Convert degrees Fahrenheit (°F) to kelvin (K).

Kelvin to Fahrenheit

Convert kelvin (K) to degrees Fahrenheit (°F).

Frequently asked questions

Are these converters accurate?

Yes — they use the exact internationally defined factors (for example, 1 inch = 2.54 cm and 1 pound = 0.45359237 kg), and temperatures use the proper offset formulas rather than simple ratios.

Do I need to press a button to convert?

No. Every converter updates as you type, and works in both directions — type in either box to convert back and forth.

Do you need a more general converter?

For categories beyond these — volume, area, speed, digital storage, and time — use the all-in-one Unit Converter, which converts across every unit in a category at once.

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