Converter calculators
Unit converter
Convert length, weight, area, and volume in one shared tool. Great when you want to switch between everyday units without hunting for separate calculators.
Runs in your browser with no account and no stored data
How it works
Pick a category: length, weight, area, or volume. Enter a value and select a source unit and a target unit. The result updates as you type.
Each unit converts to a shared base unit first, then to the target. For example: miles → metres (× 1,609.34) → kilometres (÷ 1,000).
5 miles = 8.05 km. 10 kg = 22.05 lbs. 1 acre = 0.405 hectares. 1 US gallon = 3.785 litres.
DIY and building projects, international recipes, fitness tracking, or packing within airline weight limits.
What do you want to do next?
Jump to temperature or time if you want more fast everyday conversions next.
FAQ
Why do the units change when I switch category?+
Each category has its own unit system. When you switch from length to volume, for example, only matching units are shown.
What base unit do you use internally?+
Each category converts to an internal base unit first and then into the target unit. That keeps the logic simple and consistent.