Unit Converter Online
Length, weight, temperature, speed & more
Como usar Conversor de Unidades
- 1
Pick a measurement category
Choose from length, weight, temperature, speed, volume, area, pressure, energy, or another category.
- 2
Type your value
Enter a number in the source unit field — for example, type 5 next to 'miles'.
- 3
Read all results at once
Every other unit in that category updates instantly so you can compare kilometres, metres, yards, feet, and more in one glance.
O que é Unit Converter?
Convert between hundreds of measurement units across length, weight, temperature, speed, volume, area, pressure, and energy — all instantly in your browser. See every conversion in a category at once instead of converting one pair at a time. Your values are never uploaded to any server, making this the fastest and most private way to handle everyday unit conversions for cooking, travel, engineering, and schoolwork.
Por que usar Unit Converter?
- See every unit in a category at once — no need to convert one pair at a time like Google search does.
- Covers nine measurement categories including obscure units like nautical miles, hectopascals, and British thermal units.
- Results update as you type — no submit button or page reload required.
- Works on any device with a browser, including phones and tablets.
- Completely free with no account, no ads wall, and no rate limits.
Perguntas frequentes
Can I convert multiple units at the same time?
Are the conversion factors scientifically accurate?
Does the converter handle UK and US measurement differences?
Is my data safe?
Saiba mais
Casos de uso de Unit Converter
Following international recipes
Quickly convert cups to millilitres, ounces to grams, and Fahrenheit to Celsius when cooking from a recipe written in a different measurement system.
Preparing for international travel
Convert miles to kilometres for driving distances, pounds to kilograms for luggage limits, and Fahrenheit to Celsius for weather forecasts before your trip.
Solving physics and engineering homework
Convert between SI and imperial units for problem sets — metres to feet, newtons to pounds-force, joules to calories — without leaving your browser.
Tracking fitness metrics across apps
Some fitness trackers report in miles while others use kilometres. Convert running distances, body weight, and calorie values between systems effortlessly.
Dicas e boas práticas
- 💡For cooking conversions, remember that volume and weight are not the same — 1 cup of flour weighs about 125 g, while 1 cup of water weighs 240 g. Use a kitchen scale for accuracy.
- 💡When converting temperature, keep in mind that -40 is the only point where Fahrenheit and Celsius are equal.
- 💡Bookmark the page with your most-used category pre-selected so you can reach it in one click from your phone's home screen.