UNITS OF MEASUREMENT METRIC/ENGLISH CONVERSIONS Length Volume Energy and Power 1 meter 5 39.4 inches 5 3.28 feet 5 1.09 yard 1 cubic centimeter 5 1 milliliter 5 0.001 liter 1 erg 5 1 dyne per square centimeter 1 foot 5 0.305 meters 5 12 inches 5 0.33 yard 1 cubic meter 5 1 million cubic centimeters 5 1 joule 5 10 million ergs 1 inch 5 2.54 centimeters 1,000 liters 1 calorie 5 4.184 joules 1 centimeter 5 10 millimeters 5 0.394 inch 1 cubic meter 5 35.3 cubic feet 5 1.307 cubic 1 kilojoule 5 1,000 joules 5 0.949 British 1 millimeter 5 0.001 meter 5 0.01 centimeter 5 yards 5 264 US gallons Thermal Units (BTU) 0.039 inch 1 cubic yard 5 27 cubic feet 5 0.765 cubic 1 megajoule 5 MJ 5 1,000,000 joules 1 fathom 5 6 feet 5 1.83 meters meters 5 202 US gallons 1 kilocalorie 5 1,000 calories 5 3.97 BTU 5 1 rod 5 16.5 feet 5 5 meters 1 cubic kilometer 5 1 million cubic meters 5 0.00116 kilowatt-hour 1 chain 5 4 rods 5 66 feet 5 20 meters 0.24 cubic mile 5 264 billion gallons 1 BTU 5 0.293 watt-hour 1 furlong 5 10 chains 5 40 rods 5 660 feet 5 1 cubic mile 5 4.166 cubic kilometers 1 kilowatt-hour 5 1,000 watt-hours 5 200 meters 1 liter 5 1,000 milliliters 5 1.06 quarts 5 860 kilocalories 5 3,400 BTU 1 kilometer 5 1,000 meters 5 0.621 miles 5 0.265 US gallons 5 0.035 cubic feet 1 horsepower 5 640 kilocalories 0.54 nautical miles 1 US gallon 5 4 quarts 5 3.79 liters 5 231 1 quad 5 1 quadrillion kilojoules 5 2.93 trillion 1 mile 5 5,280 feet 5 8 furlongs 5 cubic inches 5 0.83 imperial (British) gal- kilowatt-hours 1.61 kilometers lons 1 nautical mile 5 1.15 mile 1 quart 5 2 pints 5 4 cups 5 0.94 liters Quantitative Prefixes 1 acre foot 5 325,851 US gallons 5 Large Small Area 5 1,234,975 liters 1,234 cubic meters Numbers Description Numbers 1 square centimeter 5 0.155 square inch 1 barrel (of oil) 5 42 US gallons 5 159 liters 18 218 1 square foot 5 144 square inches 5 exa 10 quintillion alto 10 929 square centimeters Mass peta 1015 quadrillion femto 10215 5 5 5 5 2 1 square yard 9 square feet 1 microgram 0.001 milligram 0.000001 tera 1012 trillion pico 10 12 0.836 square meters gram giga 109 billion nano 1029 1 square meter 5 10.76 square feet 5 1.196 1 gram 5 1,000 milligrams 5 0.035 ounce 6 26 square yards 5 1 million square millimeters 1 kilogram 5 1,000 grams 5 2.205 pounds mega 10 million micro 10 1 hectare 5 10,000 square meters 5 0.01 square 1 pound 5 16 ounces 5 454 grams kilo 103 thousand milli 1023 kilometers 5 2.47 acres 1 short ton 5 2,000 pounds 5 909 kilograms 1 acre 5 43,560 square feet 5 0.405 hectares 1 metric ton 5 1,000 kilograms 5 2,200 pounds (e.g., a kilogram 5 1,000 gm; a milligram 5 one-thousandth 1 square kilometer 5 100 hectares 5 1 million of a gram) square meters 5 0.386 square miles 5 Temperature 247 acres Celsius to Fahrenheit ° F 5 (°C 3 1.8) 1 32 1 square mile 5 640 acres 5 2.59 square Fahrenheit to Celsius ° C 5 (° F 2 32) 4 1.8 kilometers.