Unit Converter
Convert weight, length, volume, speed, area and temperature — pick a category and units, and type a value.
Popular conversions
About this tool
Every conversion here uses the exact international definitions — a pound is precisely 0.45359237 kg, an inch precisely 2.54 cm, a US gallon precisely 3.785411784 litres — so results are exact arithmetic, shown to 10 significant digits.
For the pairs people convert most, DetZero also has dedicated pages (kilograms to pounds, Celsius to Fahrenheit and the rest) with the formula and a ready-made table. This hub covers everything else: stone, knots, hectares, fluid ounces and more.
How to use it
- Choose a category — weight, length, volume, speed, area or temperature.
- Pick the from and to units, then type your value.
- Read the result and the 1-unit formula line; Swap flips the direction.
Frequently asked questions
Which units does this converter cover?
Weight (kg, g, mg, lb, oz, stone, tonnes), length (m, km, cm, mm, inches, feet, yards, miles), volume (litres, ml, US gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons), speed (km/h, mph, m/s, knots), area (m², km², hectares, acres, ft², yd², mi²) and temperature (°C, °F, kelvin).
Are the conversions exact?
Yes. The underlying factors are exact international definitions, and results are displayed to 10 significant digits.
Does it work offline or store my values?
It runs entirely in your browser — nothing is sent anywhere or stored.