Unit Converter
Convert between length, weight, temperature, speed, area, and volume.
Popular Conversions
Related Guide
Free Unit Converter Online: Length, Weight, Temperature and More
About This Tool
Free unit converter online — convert between units of length (meters, feet, miles, kilometers), weight (kg, lbs, grams, ounces), temperature (Celsius, Fahrenheit, Kelvin), speed (km/h, mph, m/s, knots), area (m², km², ft², acres, hectares), and volume (liters, gallons, cups, m³). No sign-up, instant conversion, fully browser-based. Students use this for physics and chemistry homework. Travelers convert miles to kilometers and Fahrenheit to Celsius. Cooks convert cups to ml and oz to grams. Engineers switch between metric and imperial. Scientists convert between SI units. All conversions use precise conversion factors for accurate results.
How to Use
- 1
Select a category
Choose from Length, Weight, Temperature, Speed, Area, or Volume.
- 2
Choose your units
Select the "From" unit and the "To" unit from the dropdowns.
- 3
Enter the value
Type the number you want to convert. The result updates instantly.
- 4
Swap units
Click the ⇄ button to reverse the conversion direction.