Unit Converter
Convert length, weight, temperature, area, volume, speed, and data
All Length Conversions
| Kilometer (km) | 0.001 |
| Meter (m) | 1 |
| Centimeter (cm) | 100 |
| Millimeter (mm) | 1000 |
| Micrometer (μm) | 1000000 |
| Nanometer (nm) | 1000000000 |
| Mile (mi) | 0.0006213711922 |
| Yard (yd) | 1.093613298 |
| Foot (ft) | 3.280839895 |
| Inch (in) | 39.37007874 |
| Nautical Mile (nmi) | 0.0005399568035 |
What is Unit Converter?
Unit Converter is a free online tool for converting measurements between different units of the same quantity. It supports length, weight, temperature, area, volume, speed, and data size conversions across metric and imperial systems. Simply enter a value and the tool instantly shows the equivalent in all other units.
How to Use Unit Converter
- Select a category (Length, Weight, Temperature, etc.)
- Choose the source unit from the “From” dropdown
- Enter your value in the input field
- Select the target unit or view all conversions at once below
Supported Categories
- Length — km, m, cm, mm, mile, yard, foot, inch, nautical mile
- Weight / Mass — ton, kg, g, mg, lb, oz, stone
- Temperature — Celsius, Fahrenheit, Kelvin
- Area — km², m², hectare, acre, mile², ft²
- Volume — m³, liter, gallon (US/Imperial), cup, fl oz
- Speed — m/s, km/h, mph, knot, Mach
- Data Size — bit, byte, KB, MB, GB, TB, PB (binary)
Frequently Asked Questions
How is temperature conversion different from other units?
Temperature uses an offset formula, not just multiplication. For example, 0°C = 32°F (not 0°F). The conversion is: °F = (°C × 9/5) + 32, and K = °C + 273.15.
Does this use binary or decimal for data sizes?
Data sizes use binary prefixes (1 KB = 1,024 bytes). This matches how operating systems report file sizes. Note that hard drive manufacturers often use decimal (1 KB = 1,000 bytes), which is why advertised capacity appears smaller than reported capacity.
What is a Mach number?
Mach 1 is the speed of sound at sea level (~340.29 m/s or ~1,235 km/h). Mach 2 is twice the speed of sound. The actual speed varies with altitude and temperature.