Unit Conversion Calculator
The conversions the other calculators use, standalone. Pick a category, enter a value, and get the result in the target unit.
Result
How the calculation works
Pick a category, enter a value, choose the target unit. Every factor is an exact internationally defined constant, and temperature uses the true formulas rather than offsets. The swap button exchanges the two units without retyping anything.
This page exists because every other tool on the site is bilingual by design: the calorie, water and food calculators accept either unit system and convert internally with the same table this converter exposes.
Frequently asked questions
Which conversions matter most outdoors?
Temperature °C/°F, distance km/miles, elevation m/feet, weight kg/lb for pack loads, and volume ml/L/cups/fl oz for water and cooking. The length, weight, temperature, volume and speed categories here cover every unit the other calculators use.
Are the temperature conversions exact?
Yes - they are the exact formulas (×9/5 + 32 and its inverse), not approximations. The other conversions use internationally defined exact factors too: 1 inch = 25.4 mm, 1 lb = 453.59237 g, 1 US gallon = 3.785411784 L.
Cup and fluid ounce - US or imperial?
US, to match US recipe labels: 1 cup = 236.6 ml, 1 fl oz = 29.57 ml. Imperial cups and fluid ounces are about 20% larger. All other calculators on this site use the same US conventions.
Is my input saved anywhere?
The last conversion is kept in your browser's localStorage so the tool restores where you left off. Nothing is ever sent to a server.