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Unit Converter

Convert length, weight, temperature, area, volume and speed units instantly.

What is this tool?

A unit converter is a free online tool that converts measurements between different units across categories including length, weight, volume, speed, temperature, area, pressure and energy. Instead of memorising conversion factors, simply enter a value, select the units and get an accurate result instantly.

How to Use

Select a categoryChoose the measurement category — length, weight, volume, temperature, speed, area or another unit type.

Enter your valueType the number you want to convert.

Choose from and to unitsSelect the unit you are converting from and the unit you want to convert to. The result appears immediately.

Common Uses

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International Travel

Convert miles to kilometres, Fahrenheit to Celsius, pounds to kilograms and gallons to litres for trips abroad.

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Cooking & Recipes

Convert cups to grams, ounces to millilitres and tablespoons to teaspoons for recipes from different countries.

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Construction

Convert between imperial and metric measurements for building materials, blueprints and international projects.

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Science

Convert between SI units and non-SI units for physics, chemistry and engineering calculations.

Frequently Asked Questions

How do I convert miles to kilometres?

1 mile = 1.60934 kilometres. Multiply miles by 1.60934 to get km. Example: 10 miles × 1.60934 = 16.09 km.

How do I convert pounds to kilograms?

1 pound = 0.453592 kilograms. Divide pounds by 2.20462 or multiply by 0.453592. Example: 150 lbs × 0.453592 = 68.04 kg.

How do I convert Celsius to Fahrenheit?

F = (C × 9/5) + 32. Example: 25°C = (25 × 9/5) + 32 = 45 + 32 = 77°F.

How accurate are unit conversions?

All conversions use standard internationally recognised conversion factors and are accurate to the required number of decimal places.