15 Conversion Categories
| Category | Example Units |
|---|---|
| Length | Metre, km, mile, foot, inch, light year |
| Weight | kg, gram, pound, ounce, tonne, stone |
| Temperature | Celsius, Fahrenheit, Kelvin, Rankine |
| Volume | Litre, gallon, fluid ounce, cubic metre |
| Speed | km/h, mph, m/s, knot, Mach |
| Area | sq metre, hectare, acre, sq mile |
| Data | Byte, KB, MB, GB, TB, bit |
| Time | Second, minute, hour, day, week, year |
| Energy | Joule, calorie, kWh, BTU, electronvolt |
| Pressure | Pascal, bar, PSI, atmosphere, mmHg |
| Angle | Degree, radian, gradian, arc minute |
| Power | Watt, kilowatt, horsepower, BTU/hr |
| Frequency | Hz, kHz, MHz, GHz, RPM |
| Fuel | km/L, mpg (US), mpg (UK), L/100km |
| Force | Newton, kilonewton, kgf, lbf, dyne |
Most Common Conversions
- 1 mile = 1.609 km (useful for Indian highways using km, US roads using miles)
- 1 kg = 2.205 lbs
- °C to °F: Multiply by 9/5, then add 32
- 1 inch = 2.54 cm
- 1 litre = 0.264 US gallons
- 1 GB = 1,024 MB = 1,073,741,824 bytes
Temperature — Special Case
Unlike other unit conversions which use simple multiplication, temperature conversion requires an affine formula (multiply AND add/subtract) because the scales have different zero points. Our converter correctly handles Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton and Réaumur.
Frequently Asked Questions
We support over 200 units across 15 popular categories, including length, weight, temperature, volume, area, speed, pressure, energy, and power.
No, temperature conversion formulas (like Celsius to Fahrenheit) require offset scaling rather than simple multiplication factor conversions.
Yes, we use the international standard conversion constants defined by NIST to guarantee accuracy for science and engineering work.
⚖️ Convert any unit instantly — 15 categories, 200+ conversions
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