Metric, imperial, scientific — instant conversion, 100% local.
Conversion performed entirely in your browser — no data is sent to a server.
Converting means multiplying a value by a fixed ratio between two ways of measuring the same quantity. Going from metres to feet means multiplying by 3.280840; going back to metres, dividing by that same number. The station applies this principle to fifteen families of quantities — length, mass, volume, area, temperature, speed, time, digital data, energy, pressure, and five electrical quantities (voltage, current, resistance, frequency, charge) — and shows every equivalence in a category at once, without you having to pick the target unit.
Celsius, Fahrenheit and Kelvin don't convert by a simple factor, because their scales share neither the same origin nor the same step. You have to shift the zero and then change the size of the degree.
That's why a 1 °C difference equals exactly 1 K but 1.8 °F, while a temperature of 0 °C corresponds to 273.15 K and 32 °F.
| Unit | Equivalent |
|---|---|
| 1 inch (in) | 2.54 cm (exact) |
| 1 foot (ft) | 30.48 cm |
| 1 mile (mi) | 1.609 km |
| 1 pound (lb) | 453.6 g |
| 1 US gallon | 3.785 L |
| 1 bar | 100,000 Pa ≈ 0.987 atm |
| 1 horsepower (hp) | 735.5 W |
| 1 knot | 1.852 km/h |
The factors used are the reference values (BIPM, NIST). The display is rounded for readability, but the calculation keeps the full precision of a floating-point number internally.
No. Once the page has loaded, the converter works offline: no value you enter passes through a server.
These categories gather units from different fields (electronics, thermal, mechanical). Choosing the category filters the list down to units that are actually comparable.