Unit converter
Convert lengths, weights and temperatures.
- Instant
- Free
- Private (processed locally)
- No sign-up
One tool for three families of units
No more juggling between several converters. Pick a category — length, weight/mass or temperature — enter a value, and read the result in the unit of your choice. The swap button flips the units in one click.
Supported units
- Length: km, m, cm, mm, miles, yards, feet, inches.
- Weight / mass: tonne, kg, g, mg, pound (lb), ounce (oz).
- Temperature: Celsius (°C), Fahrenheit (°F), Kelvin (K).
Perfect for cooking, DIY, travel or homework. Everything is computed locally, in real time.
Frequently asked questions
How do I convert miles to kilometers?
1 mile equals 1.609 km. Choose the “Length” category, select “mi” as input and “km” as output: the conversion is instant.
How do I convert °F to °C?
The formula is °C = (°F − 32) × 5 ÷ 9. With the tool, select the “Temperature” category and let it do the math.
How many grams are in a pound?
One pound (lb) is about 453.6 grams. The tool supports kg, g, mg, tonnes, pounds and ounces.
Are the conversions accurate?
Yes, they use the official reference factors of the International System of Units. The display keeps up to six decimal places.