Unit Converters

Britain and America both live between two measurement systems, and the seams are where mistakes happen. A recipe in cups, a bolt torque in newton-meters, body weight in stone, a tire pressure in bar on a gauge that reads PSI: each one needs a conversion before it means anything. These converters use exact factors rather than the rounded numbers people memorize, work in both directions as you type, and keep enough decimal places that the answer survives being multiplied by something.

The pairs people actually search for each have a page. Cooking from an American blog in a European kitchen: the Oven Temperature Converter handles Fahrenheit, Celsius and the gas marks British ovens still use. Working on a car: the Nm to lb-ft Converter matches a torque spec to the wrench you own. Buying abroad: the Shoe Size Converter and Ring Size Converter line up US, UK and EU scales. For rooms and flooring, the Square Footage Calculator and Area Converter go together.

Watch the units that share a name but not a size. A US gallon is about 20 percent smaller than an imperial gallon, a US pint is 16 fluid ounces against 20 in the UK, and a ton can mean 2,000 pounds, 2,240 pounds or 1,000 kilograms depending on who wrote the spec. Data size has the same trap, since a kilobyte is 1,000 bytes to a drive manufacturer and 1,024 to an operating system. Each converter labels which variant it applies.