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 1 Avoirdupois 2 Work, heat Length 1 inch (in) = 2.54 centimetres (cm) = 25.4 millimetres (mm) 1 foot (ft) = 0.3048 metre (m) 1 yard (yd) = 0.9144 metre 1 mile (mi) = 1.6093 kilometres (km) 1 centimetre = 0.3937 inch 1 metre = 3.2808 feet = 1.0936 yards 1 kilometre = 0.6214 mile Area 1 square inch = 6.4516 square centimetres 1 square foot = 0.0929 square metre 1 acre = 0.4047 hectare 1 sq mile = 2.5899 square kilometres 1 square centimetre = 0.155 square inch 1 square metre = 10.7639 square feet 1 hectare = 2.471 acres 1 square kilometre = 0.3861 square mile Volume 1 cubic inch = 16.3871 cubic centimetres 1 cubic foot = 0.0283 cubic metre 1 cubic yard = 0.7646 cubic metre 1 cubic centimetre = 0.061 cubic inch 1 cubic metre = 35.3147 cubic feet 1 cubic metre = 1.3030 cubic yards Capacity 1 UK fluid ounce (fl oz) = 0.02841 litre (l) 1 US fluid ounce = 0.02961 litre 1 UK pint (pt) = 0.56821 litre 1 US pint = 0.47321 litre 1 UK gallon = 4.546 litres 1 US gallon = 3.7854 litres 1 litre = 35.1961 fluid ounces (UK) = 33.814 fluid ounces (US) = 1.7598 pints (UK) = 2.1134 pints (US) = 0.22 gallon (UK) = 0.2642 gallon (US) 1 US cup = 8 fluid ounces 1 UK pint = 1.2 US pints 1 UK gallon = 1.2009 US gallons 1 US pint = 0.83 UK pint 1 US gallon = 0.8327 UK gallon Weight1 1 ounce (oz) = 28.3495 grams (g) 1 pound (lb) = 0.454 kilogram (kg) 1 UK ton = 1.016 tonnes 1 US ton = 0.9072 tonne 1 gram = 0.0353 ounce 1 kilogram = 2.205 pounds 1 tonne = 0.9842 UK ton = 1.1023 US tons 1 UK ton = 1.1199 US tons 1 US ton = 0.8929 UK ton Temperature °Celsius to °Fahrenheit: 39, 45, 132 °Fahrenheit to °Celsius: 232, 35, 49 Energy2 1000 British thermal units (Btu) = 0.293 kilowatt hour 100,000 British thermal units = 1 therm 1 UK horsepower = 550 ft-lb per second = 745.7 watts 1 US horsepower = 746 watts Nautical length and speed = 6080 feet International nautical mile = 6076.1 feet = 0.9994 UK nautical mile 1 knot = 1 UK nautical mile per hour = 1.15 mph Petroleum 1 barrel = 34.97 UK gallons = 42 US gallons = 0.159 cubic metres Precious stones 1 troy ounce = 480 grains 1 metric carat = 200 milligrams Type sizes 72 1/4 points = 1 inch 1 didot point = 0.376 mm 1 pica em = 12 points

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