Conversion tables
Three complete tables for the conversions that shoppers and travellers need most, each calculated from the exact definition of the unit.
In this section
- LengthInches to centimetres, centimetres to inches, height in feet and inches to centimetres, and miles to kilometres, calculated from the exact definitions.
- WeightKilograms to pounds and stones, pounds to kilograms, and ounces to grams, calculated from the exact definition of the pound.
- TemperatureCelsius to Fahrenheit and back for weather, body temperature and ovens, with the formulas, reference points and a worked example.
- Size number decoderEnter a size number such as 38, 42 or 110 and see every meaning it has in shoe, clothing, ring and hat size systems, with the US equivalents.
What you will find
- Length: inches and centimetres, body height in feet and inches, miles and kilometres.
- Weight: kilograms, pounds, stones and ounces.
- Temperature: Celsius and Fahrenheit for weather, body temperature and ovens.
Each page shows the formula, a worked example and the usual mistakes, so you can convert a value that is not in a table.
Exact and rounded values
The inch and the pound are defined through the metre and the kilogram, so their factors are exact. Table values are rounded to the decimals shown. For anything where small differences matter, calculate from the exact factor on the page.