How it works
A walkthrough, end to end.
- 1
Pick a category: length, mass, volume, temperature, area, or energy.
- 2
Enter a value and choose source and target units.
- 3
See the converted result instantly.
Reference
Unit conversions
Each unit converts to a base unit (meter, kilogram, etc.), then to the target unit. Temperature uses linear formulas (e.g., F = C × 9/5 + 32).
Use cases
What you can do with this.
Travel
Convert miles to km on a road trip.
Cooking
Translate recipe units between systems.
Engineering
Convert PSI/Pa, in/mm, ft³/L.
Lab work
Volume conversions for solutions.
International commerce
Quote prices per kg vs per pound.
FAQ
Frequently asked.
Uses standard SI conversion factors.
Not supported — use only the listed units.
No. All math runs in your browser.
Supports °C, °F, K.