Conversion tables

Convert cups, tablespoons and teaspoons to grams and milliliters. Practical measures for baking and cooking from US and UK recipes.

Convert imperial and US customary units – inches, feet, yards, miles, ounces, pounds and stones – to metric units.

Historical Czech units of length, area and volume – such as loket, sáh, jitro or korec – and their conversion to modern metric units.

How many kilograms is one liter? It depends on the substance. Density table for water, milk, oil, honey, flour and more.

Convert engine power between kilowatts and horsepower, plus torque in newton-meters. Handy for car specifications.

Convert energy between kilojoules, kilocalories and kilowatt-hours. Useful for food energy and electricity.

Convert pressure between bar, psi, kilopascals and atmospheres. Handy for tyre pressure and technical specifications.

Convert speed between kilometers per hour, meters per second, miles per hour and knots.

Convert flow rate between liters per minute, liters per second and cubic meters per hour.

Convert slope between percent, degrees and ratio. See common slopes you meet in everyday life.

Convert oven temperatures between gas mark, °C, fan °C and °F. Handy for following recipes from different countries.

Kilo is a thousand, mega a million, giga a billion – and on the other side milli, micro, nano. An overview of all common SI prefixes with powers.

How to write numbers in Roman numerals. Basic symbols, common numbers and years with their Roman notation.

Why does a disk show less capacity than advertised? The difference between decimal (MB, GB) and binary (MiB, GiB) data units explained.

The difference between megabits (Mbps) and megabytes (MB/s), and how long it takes to download a file at a given connection speed.

Convert fuel consumption between liters per 100 km, miles per gallon (US and UK) and kilometers per liter.

Convert temperature between degrees Celsius, Fahrenheit and Kelvin, including the conversion formulas.