Unit Converter

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Instant two-way unit conversion across 6 categories. See all units simultaneously in the reference table, or use the focused two-unit converter.

All 9 length units

Works great for

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Converting metric and imperial units

Switch between kilometres and miles, kilograms and pounds, or litres and gallons in one click. Covers all standard metric-to-imperial conversions for engineering, science, and everyday use.

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Physics and science homework

Convert between SI units for length, mass, speed, volume, and area instantly during calculations. Supports Kelvin, Rankine, and other scientific units that standard calculators miss.

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Scaling recipes between measurement systems

Convert teaspoons to millilitres, cups to litres, or ounces to grams when adapting recipes from US cookbooks for metric kitchens. All common cooking volume and weight units are supported.

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Travel unit conversions

Quickly convert Fahrenheit to Celsius for weather, miles to kilometres for road signs, or knots to mph for sailing and aviation. Ideal for international travel planning and trip navigation.

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Converting memory and storage units

Switch between megabytes, gigabytes, and terabytes when comparing storage capacity or configuring systems. Covers all data-size prefixes from milligrams through metric tons in the weight category.

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International architectural measurements

Convert feet and inches to centimetres and metres when sharing blueprints across countries or ordering materials internationally. Supports mm², ft², acres, and hectares for area conversions too.

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Frequently asked questions

How do I convert kilometers to miles or Celsius to Fahrenheit?

Select the length or temperature category, enter a value in one unit, and the result appears instantly in the paired unit alongside a full reference table of all related units. Switch categories for weight, volume, area, or speed the same way.

What unit categories does this converter support?

It covers six categories: length, weight, temperature, volume, area, and speed. Each category shows every supported unit at once in a reference table in addition to the focused two-unit converter.

Is this unit converter accurate for cooking measurements?

Yes. The volume and weight categories include common cooking units such as cups, tablespoons, and grams, converted with standard precise ratios, so measurements convert reliably for recipes.

Can I see all unit conversions at once instead of just two units?

Yes. Alongside the two-unit converter, a reference table lists every unit in the selected category simultaneously, so you can compare a single value across all units at a glance.