Instantly convert between hundreds of units across 8 categories — length, weight, temperature, volume, area, speed, digital storage, and time. All conversions happen instantly with no need to press a button.
To convert kilometres to miles, multiply by 0.621371. For example, 10 km x 0.621371 = 6.21 miles. To convert miles to kilometres, multiply by 1.60934. For a quick mental estimate, multiply km by 0.6.
To convert Celsius to Fahrenheit: multiply by 9, divide by 5, then add 32. Formula: F = (C x 9/5) + 32. For example, 100C = (100 x 9/5) + 32 = 212F. To reverse, subtract 32 then multiply by 5 and divide by 9.
To convert kilograms to pounds, multiply by 2.20462. For example, 70 kg x 2.20462 = 154.3 lbs. To convert pounds to kilograms, divide by 2.20462. A quick estimate: multiply kg by 2.2 to get approximate pounds.
The US gallon is 3.785 litres, while the UK imperial gallon is 4.546 litres, about 20% larger. This means fuel economy figures (miles per gallon) are not directly comparable between US and UK vehicles.
1 metre = 3.28084 feet. Conversely, 1 foot = 0.3048 metres. For a quick estimate, multiply metres by 3.28 to get feet. A person who is 6 feet tall is approximately 1.83 metres.