Unit Converter
Convert between 8 categories and 30+ units — length, weight, temperature, volume, area, speed, data size, and pressure. This free unit converter gives you an instant result and shows the formula behind it.
- Free, no signup
- Instant results
- Works on mobile
- Exact formulas
Result
Results update as you type. Nothing you enter leaves your browser.
Popular unit conversions
Jump straight to the conversion you need — each link opens the matching tool.
Why use this unit converter
One converter for everyday measurements, built to be fast and easy to check.
Eight measurement categories
Length, weight, temperature, volume, area, speed, data size, and pressure — switch category without leaving the page.
Results as you type
Change the value or either unit and the answer updates immediately, with the formula shown underneath.
Shareable links
The category, value, and units are stored in the URL, so a copied link reopens exactly the same conversion.
How unit conversion works
Converting a measurement means multiplying by a fixed factor that relates the two units. Length, weight, volume, area, speed, data size, and pressure all convert through a base unit; temperature also needs an offset because the scales start at different zero points.
Choose a category
Pick the measurement you need — length, weight, temperature, volume, area, speed, data size, or pressure.
Enter the value and units
Type the number, then choose the unit you have and the unit you want. Use the swap button to reverse the conversion.
Read, copy, or share the result
The converted value appears together with its formula. Copy the number, or copy the page link to keep the conversion.
Example formula
miles = kilometers x 0.621371
Worked example
To convert 10 kilometers to miles: 10 x 0.621371 = 6.2137 miles.
Questions about the unit converter
Short answers about accuracy, sharing, and how the conversions are calculated.
What is a unit converter?
A unit converter changes a measurement from one unit to another, such as meters to feet, kilograms to pounds, or Celsius to Fahrenheit. This one covers eight categories and runs entirely in your browser.
How do I convert units?
Choose a category, enter the value, and select the units you need. The result updates as you type and the formula is shown underneath so you can check the maths.
Are the conversion results accurate?
Yes. Each category uses fixed, defined factors — one inch is exactly 2.54 centimeters and one kilogram is exactly 2.20462 pounds. Only the displayed decimals are rounded.
Can I share or bookmark a conversion?
Yes. The category, value, and units are stored in the page URL, so a copied link reopens the same conversion.
Is the unit converter free to use?
Yes. It is free, needs no account, and works on desktop and mobile.
Start converting in seconds
No account, no download, no limits. Choose a tool and get your answer.
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