Free Unit Converter — Length, Mass, Temperature, Speed & More
Free online unit converter for students: length, mass, time, area, volume, speed, energy, pressure, temperature (°C/°F/K) and digital storage. Instant, accurate, no signup — for physics, chemistry & maths.
TL;DR: Free online unit converter for students: length, mass, time, area, volume, speed, energy, pressure, temperature (°C/°F/K) and digital storage. Instant…
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
A free, accurate unit converter for students — convert length, mass, temperature, speed, energy, pressure, area, volume, time and digital storage instantly in your browser. Perfect for physics and chemistry numericals, lab work and everyday maths.
Common conversions
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm |
| 1 mile | 1.609 km |
| 1 pound (lb) | 0.4536 kg |
| 0 °C | 32 °F = 273.15 K |
| 100 °C | 212 °F |
| 1 m/s | 3.6 km/h |
| 1 kcal | 4.184 kJ |
| 1 atm | 101325 Pa = 1.01325 bar |
| 1 GB | 1024 MB |
How to convert units
To convert between units, multiply by the exact conversion factor. For temperature, use °F = °C × 9⁄5 + 32 and K = °C + 273.15. The converter above does it instantly for ten categories — free, no sign-up. Need marks maths too? Try the free student calculators.