Convert measurements between commonly used units for length, weight, temperature, area, volume, speed, and time. Enter a value, choose the original unit and select the unit you want to convert to.
This unit converter is useful for everyday measurements, schoolwork, construction, cooking, travel, fitness, engineering, business calculations, and other situations where the same quantity needs to be expressed in a different unit.
Select a conversion category, choose your units, and enter the number you want to convert.
Different unit systems can describe the same physical quantity in different ways. For example, a distance can be expressed in metres, kilometres, miles, feet, or inches. The quantity has not changed; only the way it is represented has changed.
Convert metres, kilometres, centimetres, millimetres, miles, yards, feet, and inches.
Convert kilograms, grams, milligrams, tonnes, pounds, and ounces.
Convert between Celsius, Fahrenheit, and Kelvin using their respective temperature formulas.
Convert square metres, square kilometres, square feet, square yards, acres, and hectares.
Convert litres, millilitres, cubic metres, US gallons, quarts, pints, and cups.
Convert common speed units such as km/h and mph, as well as seconds, minutes, hours, days, and weeks.
For most categories, the calculator uses a base-unit method. The original value is first converted into a standard unit for that category and then converted from the standard unit into the requested target unit.
For example, the base unit for length in this calculator is the metre. A kilometre is 1,000 metres, while an inch is 0.0254 metres. The appropriate factors allow the calculator to move between these units consistently.
Temperature is different because its scales have different reference points. It therefore uses dedicated Celsius, Fahrenheit, and Kelvin formulas rather than a simple multiplication factor.
Here are some examples of common unit conversions and the type of result you can expect.
Your converted measurement is shown below.
These details identify the measurement category and units used for your conversion.
Convert measurements when solving mathematics, physics, chemistry, geography, or other school exercises.
Convert lengths and areas when working with metres, feet, acres, hectares, square metres, or other measurements.
Convert volume measurements such as litres, millilitres, cups, pints, and gallons when adapting recipes.
Convert distances and speeds between metric and commonly used imperial units.
Convert running or cycling speeds and distances, especially when information is provided in a different measurement system.
Quickly convert measurements when comparing product specifications, instructions, dimensions, or quantities.
Temperature conversion is different from ordinary unit conversion because the scales do not share the same zero point.
The converter applies the appropriate formula automatically when temperature is selected.
This converter provides mathematical unit conversions using the units and conversion factors included in the tool. It does not determine which measurement standard is appropriate for a particular professional situation.
Unit conversions are performed directly in your browser. The calculator does not need to send the measurement you enter to a server in order to perform the conversion. This allows you to use the tool quickly without creating an account or submitting personal information.
Whether you are converting kilometres to miles, kilograms to pounds, hectares to square metres, litres to gallons, or Celsius to Fahrenheit, this converter provides a quick way to express the same measurement in another unit. Always check the measurement system being used when the conversion is important to a professional or technical decision.
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