Unit Converter

A measurement arrives in the wrong unit. Unit Converter multiplies by a fixed factor for the kind you pick.

Seven kinds, no currency

Length uses millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles, through metres. An inch is 0.0254 metres. Weight uses milligrams through stones, through grams. Temperature converts among Celsius, Fahrenheit, and Kelvin. Area includes square metres, square kilometres, square feet, square yards, acres, and hectares. Volume includes millilitres, litres, cubic metres, US gallons, quarts, and cups. Speed includes metres per second, kilometres per hour, miles per hour, and knots. Data size includes bytes, decimal KB through TB, and binary KiB, MiB, and GiB. Currency Converter is a different tool, and its rates are illustrative, not live.

Where people misread the result

Data units are the sharp edge. A KB here is 1000 bytes. A KiB is 1024. A file that a vendor calls 1 MB may be either, so check which you picked. Temperature is not a simple multiply. Fahrenheit subtracts 32 before scaling. Gallon and cup are the US sizes used in the factor table, not imperial gallons. The display rounds for reading. GPA Calculator, Dice Roller, and Aspect Ratio Calculator answer other questions. Unit Price Calculator divides a price by a quantity. It does not convert metres. An inch is 2.54 centimetres, the same 0.0254 metre factor written the other way.

When you need a different conversion

There is no cooking-cup versus metric-cup debate beyond the factor in the table, no fuel economy, and no clothing sizes. Hours to Decimal and Fraction Converter cover time and fractions. Percentage Calculator covers percents. The numbers stay in this browser. If a result looks off by a thousand, you probably mixed MB and MiB. Pace Calculator and Fuel Cost Calculator are separate forms. Write the unit name next to a copied result so the next person knows whether you meant MB or MiB.