Unit Converter
Metric to imperial and back again, in decimals and fractions.
Type a number and a unit: 7cm, 2.75 in, 2-3/4", 5' 6 1/2", 1.2 m, 3 yd.
Used when the measurement has no unit typed in.
Enter a measurement to see every conversion.
An inch is exactly 25.4 mm, so these conversions are exact; only the fraction rows are rounded, and they say by how much. Feet and inches can be combined (5 ft 6 in), and so can any other units (1 m 20 cm).
Type a number and a unit: 250ml, 1.5 L, 3/4 cup, 1 cup 2 tbsp, 12 fl oz, 2 gal, 40 cu in.
Used when the measurement has no unit typed in.
Enter a measurement to see every conversion.
These are US customary measures: a US gallon is 231 cubic inches (3.785 L) and a cup is 8 US fl oz. British imperial pints, quarts and gallons are about 20% larger. Fractions of teaspoons, tablespoons and cups are rounded to the nearest 1/8.
Type a number and a scale: 20C, 68 °F, -40 f, 98.6F, 300 K.
Used when the temperature has no scale typed in.
Enter a temperature to see every conversion.
°F = °C × 9/5 + 32, and K = °C + 273.15. Nothing can be colder than absolute zero: 0 K, −273.15 °C or −459.67 °F.