


if you have  multiply by  to get  
Acres  43 560  Square feet  
Acres  4047  Square meters  
Acres  1.562 × 10^{ 3}  Square miles  
Acrefeet  43 560  Cubic feet  
Acrefeet  325 851  Gallons  
Acrefeet  1233.49  Cubic meters  
Atmospheres  76  cms. of mercury  
Atmospheres  29.2  Inches of mercury  
Atmospheres  33.9  Feet of water  
Barrels (oil)  42  Gallons (oil)  
Barrels (cement)  376  Pounds (cement)  
Bags or sacks (cement)  94  Pounds (cement)  
Boardfeet  144  Cubic inches  
British Thermal units (B.T.U.)  0.252  Kilogramcalories  
British Thermal units (B.T.U.)  777.5  Footpounds  
British Thermal units (B.T.U.)  3.927 × 10^{4}  Horsepowerhours  
British Thermal units (B.T.U.)  107.5  kilogrammeters  
British Thermal units (B.T.U.)  2.928 × 10^{4}  Kilowatthours  
B.T.U./minute  0.0256  Horsepower  
B.T.U./minute  0.01757  Kilowatts  
B.T.U./minute  17.57  Watts  
Centares (Centaires)  1  Square meters  
Centigrams  0.01  Grams  
Centiliters  0.01  Liters  
Centimeters  0.3937  Inches  
Centimeters  0.01  Meters  
Centimeters  10  millimeters  
Cubic Centimeters  3.531 × 10^{5}  Cubic meters  
Cubic Centimeters  0.06102  Cubic inches  
Cubic Centimeters  10^{6}  Cubic meters  
Cubic Centimeters  1.308 × 10^{6}  Cubic yards\  
Cubic Centimeters  2.642 × 10^{ 4}  Gallons  
Cubic Centimeters  0.001  Liters  
Cubic Centimeters  2.113 × 10^{3}  Pints (liquid)  
Cubic Centimeters  1.057 × 10^{3}  Quarts (liquid)  
Cubic feet  2.832 × 10^{4}  Cubic centimeters  
Cubic feet  1728  Cubic inches  
Cubic feet  0.02832  Cubic meters  
Cubic feet  0.03704  Cubic yards  
Cubic feet  7.48052  Gallons  
Cubic feet  28.2  Liters  
Cubic feet  59.84  Pints (liquid)  
Cubic feet  29.92  Quarts (liquid)  
Cubic inches  16.39  Cubic centimeters  
Cubic inches  5.787 × 10^{4}  Cubic feet  
Cubic inches  1.639 × 10^{5}  Cubic meters  
Cubic inches  2.143 &3215 10 
Cubic yards  
Cubic inches  4.329 × 10^{3}  Gallons  
Cubic inches  .01639  Liters  
Cubic inches  0.03463  Pints (liquid)  
Cubic inches  0.01732  Quarts (liquid)  
Cubic meters  10^{6}  Cubic centimeters  
Cubic meters  35.31  Cubic feet  
Cubic meters  61.023  Cubic inches  
Cubic meters  1.308  Cubic yards  
Cubic meters  264.2  Gallons  
Cubic meters  1000  Liters  
Cubic meters  2113  Pints (liquid)  
Cubic meters  1057  Quarts (liquid)  
Cubic yards  7.646 × 10^{5}  Cubic centimeters  
Cubic yards  27  Cubic feet  
Cubic yards  46656  cubic inches  
Cubic yards  0.7646  Cubic meters  
Cubic yards  202  Gallons  
Cubic yards  764.6  Liters  
Cubic yards  1616  Pints (liquid)  
Cubic yards  807.9  Quarts (liquids)  
Degrees (angle)  60  Minutes  
Degrees (angle)  0.01745  Radians  
Degrees (angle)  3600  Seconds  
Fathoms  6  feet  
Feet  30.48  Centimeters  
Feet  12  Inches  
Feet  0.3048  Meters  
Feet  0.333  Yards  
Feet of water  0.0295  Atmospheres  
Feet of water  0.8826  Inches of mercury  
Feet/minute  0.3048  Meters/minute  
Feet/minute  0.01136  Miles/hour  
Feet/second  1097  Kilometers/hour  
Feet/second  0.5921  Knots  
Feet/second  0.6818  Miles/hour  
Feet/second  0.01136  Miles/minute  
Footpounds  1.286 × 10^{3}  British Thermal Units  
Footpounds  5.05 × 10^{7}  Horsepowerhours  
Footpounds  3.766 × 10^{7}  Kilowatthours  
Footpounds/second  1.818 × 10^{3}  Horsepower  
Gallons  3785  Cubic centimeters  
Gallons  0.1337  Cubic feet  
Gallons  231  Cubic inches  
Gallons  3.785 × 10^{3}  Cubic meters  
Gallons  4.951 × 10^{3}  Cubic yards  
Gallons  3.785  Liters  
Gallons  8  Pints (liquid)  
Gallons  4  Quarts (liquid)  
Gallons (U.K.)  1.20095  Gallons (U.S.)  
Gallons (U.S.)  0.83267  Gallons (U.K.)  
Gallons (water)  8.3453  pounds (water)  
Gallons/minute  2.228 × 10^{3}  Cubic feet/second  
Grams  0.001  Kilograms  
Grams  1000  Milligrams  
Grams  0.03527  Ounces  
Grams  0.3215  Ounces (troy)  
Grams  2.205 × 10^{3}  Pounds  
Hectares  2.471  Acres  
Hectares  1.076 &3215 10^{5}  Square feet  
Horsepower  42.44  B.T.U./minute  
Horsepower  33000  Footpounds/minute  
Horsepower  550  Footpounds/second  
Horsepower  0.7457  Kilowatts  
Horsepower  745.7  Watts  
Horsepowerhours  2547  British Thermal Units  
Horsepowerhours  1.98 × 10^{6}  Footpounds  
Horsepowerhours  0.7457  Kilowatthours  
Inches  2.54  Centimeters  
Inches of mercury  0.03342  Atmospheres  
Inches of mercury  1.133  Feet of water  
Inches of mercury  70.73  Pounds/square foot  
Inches of water  0.002458  Atmospheres  
Inches of water  0.07355  Inches of mercury  
Inches of water  5.202  Pounds/squarefoot  
Kilograms  2.205  Pounds  
Kilograms  1.102 × 10^{3}  Tons(short)  
Kiloliters  1000  Liters  
Kilometers  10^{5}  Centimeters  
Kilometers  3281  Feet  
Kilometers  1000  Meters  
Kilometers  0.6214  Miles  
Kilometers  1094  Yards  
Kilometers/hour  54.68  Feet/minute  
Kilometers/hour  0.9113  Feet/second  
Kilometers/hour  0.5396  Knots  
Kilometers/hour  16.67  Meters/minute  
Kilometers/hour  0.6214  Miles/hour  
Kilowatts  56.92  B.T.U./minute  
Kilowatts  4.425 × 10^{4}  Footpounds/minute  
Kilowatts  1.341  Horsepower  
Kilowatts  1000  Watts  
Kilowatthours  3415  British Thermal Units  
Kilowatthours  2.655 × 10^{6}  Footpounds  
Kilowatthours  1.341  Horsepowerhours  
Liters  1000  Cubic centimeters  
Liters  0.03531  Cubic feet  
Liters  61.02  Cubic inches  
Liters  0.001  Cubic meters  
Liters  1.208 × 10^{3}  Cubic yards  
Liters  0.2642  Gallons  
Liters  2.113  Pints (liquid)  
Liters  1.057  Quarts (liquid)  
Meters  100  Centimeters  
Meters  3.281  Feet  
Meters  39.37  Inches  
Meters  0.001  Kilometers  
Meters  1000  Millimeters  
Meters  1.094  Yards  
Miles  1.609 × 10^{5}  Centimeters  
Miles  5280  Feet  
Miles  1.609  Kilometers  
Miles  1760  Yards  
Miles/hour  88  Feet/minute  
Miles/hour  1467  Feet/second  
Miles/hour  1609  Kilometers/hour  
Miles/hour  0.8684  Knots  
Miles/hour  26.82  Metres/minute  
Miles/minute  88  feet/second  
Millimeters  0.03937  Inches  
Ounces  16  Drams  
Ounces  437.5  Grains  
Ounces  0.0625  Pounds  
Ounces  0.9115  Ounces (troy)  
Ounces  2.79 × 10^{5}  Tons (long)  
Ounces  2.835 × 10^{5}  Tons (metric)  
Ounces (fluid)  1.805  Cubic inches  
Ounces (fluid)  0.02957  Liters  
Pennyweight (toy)  0.05  Ounces (troy)  
Pounds  16  Ounces  
Pounds  0.0005  Tons (short)  
Pounds of water  0.01602  Cubic feet  
Pounds of water  27.68  Cubic inches  
Pounds of water  0.1198  Gallons  
Pounds/square inch  703.1  Kilograms/square meter  
Quadrants (angle)  90  Degrees  
Quarts (dry)  67.2  Cubic inches  
Quarts (liquid)  57.75  Cubic inches  
Quires  25  Sheets  
Reams  500  Sheets  
Seconds(angle)  4.848 × 10^{3}  Radians  
Square centimeters  1.076 × 10 
Square feet  
Square feet  144  Square inches  
Square feet  0.0929  Square meters  
Square feet  3.587 × 10 ^{8}  Square miles  
Square feet  0.111  Square yards  
Square inches  6.452  Square centimeters  
Square inches  6.944 × ^{3}  Square feet  
Square inches  645.2  Square millimeters  
Square Kilometers  271.1  Acres  
Square Kilometers  10.76 × 10^{6}  Square feet  
Square Kilometers  10^{6}  Square meters  
Square Kilometers  0.3861  Square miles  
Square Kilometers  1.196 × 10^{6}  square yards  
Square meters  2.471 × 10 ^{6}  Acres  
Square meters  10.76  Square feet  
Square meters  3.861 × 10^{6}  Square miles  
Square meters  1.196  Square yards  
Square miles  640  Acres  
Square miles  27.88 × 10 ^{6}  Square feet  
Square miles  2.59  Square kilometers  
Square miles  3.098 × ^{6}  Square yards  
Square millimeters  0.01  Square centimeters  
Square millimeters  1.55 × 10^{3}  Square inches  
Square yards  2.066 × 10^{4}  acres  
Square yards  9  Square feet  
Square yards  0.8361  Square meters  
Square yards  3.228 × 10^{7}  Square miles  
Temp (^{o}C) + 17.78  1.8  Temp (^{o}F)  
Temp (^{o}F)  32  0.555  Temp (^{o}C)  
Tons (long)  2240  Pounds  
Tons (metric)  1000  Kilograms  
Tons (metric)  2205  Pounds  
Tons (short)  2000  Pounds  
Tons (short)  32000  Ounces  
Tons (short)  907.18486  Kilograms  
Watts  0.05692  B.T.U./minute  
Watts  44.26  Footpounds/minute  
Watts  0.7376  Footpounds/second  
Watts  1.341 × 10^{3}  Horsepower  
Watts  0.01434  Kilogramcalories/minute  
Watts  0.001  Kilowatts  
Wattshours  3.415  British Thermal Units  
Wattshours  2655  Footpounds  
Wattshours  1.341 × 10^{3}  Horsepowerhours  
Wattshours  0.8605  Kilogramcalories  
Wattshours  0.001  kilowatthours  
Yards  91.44  Centimeters  
Yards  3  Feet  
Yards  36  Inches  
Yards  0.9144  Meters  
Bushels  4  Pecks  
Cups  48  Teaspoons  
Cups  16  Tablespoons  
Cups (liquid)  0.5  Pints  
Cups (liquid)  0.25  Quarts  
Quarts (liquid)  0.25  Gallons  
Quarts (dry)  0.125  Pecks  
Tablespoons  0.0625  Cups  
Teaspoons  0.333  Tablespoons  
Miles  8  Furlongs  
Miles  80  Chains  
Chains  4  Rods  
Rods  16.5  Feet  
Rods  5.5  Yards  
Link  7.95  Inches  
Link  0.01  Chains  
Yard  0.0455  Chains  
Feet  0.01515  Chains  
Chains  66  Feet  
Turns  2  Pipes  
Pipes  1.5  Puncheons  
Pipes  2  Hogsheads  
Pipes  4  Barrels  
pipes  126  Gallons  
Puncheons  2  Tierces  
Puncheons  84  Gallons  
Hogsheads  2  Barrels  
Hogsheads  63  Gallons  
Tierces  42  Gallons  
Barrels  31.5  Gallons  
Oct 1999: The Polar Lander's sibling aircraft, the $125 million Mars' Climate orbiter burned up in the Planet's atmosphere because of the Space Agency's embarrassing failure to convert navigation data into Metric units. This website doesn't cost the fraction of the Orbiter, guys!. Go back to the basics, it could save millions.  
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