Converters

Length, weight, temperature, speed, area, volume, and recipe conversions built on exact unit definitions.

Tools in this category

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Length Converter

Convert millimetres, centimetres, metres, kilometres, inches, feet, yards and miles with adjustable precision.

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Weight Converter

Convert milligrams, grams, kilograms, tonnes, ounces, pounds, stone and US or UK tons.

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Temperature Converter

Convert Celsius, Fahrenheit and Kelvin in both directions, with absolute-zero validation.

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Speed Converter

Convert metres per second, kilometres per hour, miles per hour, feet per second and knots.

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Area Converter

Convert square millimetres, metres, kilometres, hectares, square feet, acres and square miles.

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Volume Converter

Convert millilitres, litres, cubic metres and US or UK cooking units such as cups, pints and gallons.

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Recipe Converter

Scale a recipe to a different number of servings and convert cooking units without inventing ingredient densities.

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About this category

Each converter handles one measurement family so the unit list stays readable and every result can be traced to a precise definition. Metric and imperial units sit side by side, and US and UK variants are labelled separately wherever they differ.

Conversions update instantly in your browser, with adjustable decimal precision. Internal values keep full precision; only the displayed result is rounded.

Length, weight, temperature, speed, area, and volume.
Explicit US and UK labels for volume units that are not interchangeable.
Recipe scaling that never invents density conversions between volume and weight.