Unit converter
Convert between common units across many categories — length, weight, temperature, area, volume, speed, data, and more. Choose a category, pick your units, and the result updates as you type.
How conversion works
For most categories every unit is defined against a single base unit using fixed ratios, so the tool converts to that base and then to your chosen unit — any pair lines up correctly. Temperature is the exception and uses the standard formulas between Celsius, Fahrenheit, Kelvin, and Rankine.
FAQs about unit conversion
Which units can I convert?
Pick a category — length, weight, temperature, area, volume, speed, time, data, pressure, energy, power, angle, or frequency — and each one carries a deep set of units, from nanometres to light years and from bytes to yottabytes.
How does conversion work?
For most categories every unit is defined against a single base unit, so the tool converts your value to that base and then into the unit you picked. This means any pair within a category lines up correctly.
How is temperature different?
Temperature uses formulas rather than simple ratios. Celsius, Fahrenheit, Kelvin, and Rankine each have a fixed relationship, so the tool applies the correct formula for the pair you select.
How does it show very large or small numbers?
Everyday results are shown in full with grouping. When a result is extremely large or tiny, such as bytes inside a yottabyte, it switches to compact scientific notation so it stays readable.
Can I swap the from and to units?
Yes. Change either dropdown and the result recalculates instantly, so you can convert in whichever direction you need.