Unit Converter Online
Length, weight, temperature, speed & more
Como usar Conversor de Unidades
- 1
Select a category
Choose length, weight, temperature, speed, or another measurement category.
- 2
Enter a value
Type the number you want to convert in the source unit field.
- 3
View results
Conversions to all available units in that category are shown instantly.
Perguntas frequentes
Is my data safe?
How accurate are the conversions?
Why is temperature conversion different from other units?
Are US and UK units the same?
Can it convert currency?
Saiba mais
O que é Unit Converter?
Convert between hundreds of units across length, weight, temperature, speed, volume, area, pressure, energy, and more. Supports metric, imperial, and scientific measurement systems. Type a value and see instant conversions to every unit in the category simultaneously. Perfect for cooking recipes, international travel, engineering calculations, science homework, and everyday measurement questions. All conversions happen in your browser — no sign-up or installation required.
Por que usar Unit Converter?
- All units at once — see conversions to every unit in a category simultaneously, not just one at a time.
- Comprehensive coverage — length, weight, temperature, speed, volume, area, pressure, energy, and more.
- Accurate conversion factors — uses scientifically correct conversion ratios, not rounded approximations.
- Works instantly with no page reload — type a value and all conversions appear in milliseconds.
- No sign-up or app install — open your browser and start converting immediately.
Casos de uso de Unit Converter
Cooking and recipes
Convert between cups and milliliters, ounces and grams, Fahrenheit and Celsius when following recipes from different countries.
International travel and shopping
Convert between miles and kilometers, pounds and kilograms, Fahrenheit and Celsius, and USD and foreign currency equivalents for international shopping.
Engineering and science
Convert between SI units and imperial units for engineering calculations, physics problems, and scientific data analysis.
Fitness and health
Convert between pounds and kilograms for weight tracking, miles and kilometers for running distances, and calorie unit equivalents for nutrition.
Dicas e boas práticas
- 💡Temperature conversion uses formulas rather than ratios: °C = (°F - 32) × 5/9. This is why you cannot simply scale temperature values like other units.
- 💡The metric system uses prefixes (kilo-, centi-, milli-) that always represent powers of 10, making conversions within metric units straightforward.
- 💡For cooking, note that volume and weight measurements are not interchangeable — 1 cup of flour weighs less than 1 cup of water. Volume-to-weight depends on the substance.
- 💡UK and US measurements share unit names but sometimes differ in value — a UK pint is 568 mL, while a US pint is 473 mL. Always clarify which system a recipe uses.
Como se compara
Google and Wolfram Alpha provide quick unit conversions via search but only convert one pair of units at a time. This tool shows all conversions in a category simultaneously, which is more useful when you are not sure which unit you need. Purpose-built apps like ConvertPad offer offline use and specialized categories; for everyday web conversions without an app download, browser-based tools are faster to access.