Unit converter for everyday measurement conversions

Conversion result

1 m = 0 km

One field, four measurement families, no page reloads

Convert metres, kilograms, litres and degrees without hunting for a separate page for every unit. Pick a category, type a number, read the answer.

Most conversions people actually need fall into four families: how long something is, how heavy it is, how hot it is and how much of it there is. This page covers all four so you are not bouncing between tabs.

Type the number, choose what you have and what you want, and the result appears as you type. Nothing is rounded away silently — you see enough decimals to spot when a value is 2.54 rather than a tidy 2.5.

What this calculator shows

The converted value, updated on every keystroke
Both units side by side so you can sanity-check the direction of the conversion
Enough decimal places to keep exact factors (inch = 2.54 cm) visible

What to keep in mind

Conversions use exact internationally defined factors, not rounded classroom values.
Temperature is a scale shift, not a ratio, so 0 °C is 32 °F rather than zero.

FAQs

Why does the result show more decimals than I expected?

Because rounding early is how conversion mistakes happen. A 12-inch value is exactly 30.48 cm; if the page showed 30.5 and you multiplied it by six, you would drift by more than a centimetre.

Can I convert between the four categories?

No, and no honest converter can. Kilograms and litres only line up if you know what the substance is — a litre of honey weighs about 1.42 kg, a litre of flour roughly 0.53 kg. For those, use the cooking converter, which asks for the ingredient.

Is a US gallon the same as a UK gallon?

No. A US gallon is 3.785 litres, an imperial gallon is 4.546 litres — about 20% larger. Recipes and fuel figures from the two countries are not interchangeable.

Does it work offline?

Yes. The maths runs in your browser, so once the page has loaded the conversions keep working without a connection.

Worked example

A recipe in inches, an oven in centimetres

Input: 9 inches → centimetres

Output: 22.86 cm

Note: An inch is defined as exactly 2.54 cm, so a 9-inch tin is 22.86 cm — close enough to a 23 cm tin to use it.

Useful links

All tools in Converters for units, temperature, weight, and cooking measures

Unit converter for everyday measurement conversions

Conversion result

Related tools

Length Converter

Weight Converter

Temperature Converter

Useful links