CONVERSION FACTORS Multiply by To Obtain Multiply by To Obtain Absolute viscosity BTU/minute 17.57 W att s (poise) 1 Gram/second centimeter BTU/pound 0.556 Calories (Kg)/Kilogram Absolute viscosity Bushels 2150.4 Cubic inches (centipoise) 0.01 Poise 35.24 Liters Acceleration due 4 Pecks to gravity ( g ) 32.174 Feet/second 2 32 Quarts (dry) 980.6 Centimeters/second 2 Cables 120 Fathoms Acres 0.4047 Hectares Calories (gm) 0.003968 BTU 10 Square Chains 0.001 Calories (Kg) 43,560 Square Feet 3.088 Foot pounds 4047 Square Meters 1.558 X 10 6 Horse power hours 0.001562 Square Miles 4.185 Joules 4840 Square Yards 0.4265 Kilogram meters 160 Square Rods 1.1628 X 10 6 Kilowatt hours Acre-feet 43,560 Cubic Feet 0.0011628 W att hours 325,851 Gallons (US) Cal (gm)/sec/cm 2 / 1233.49 Cubic Meters C/cm 242.13 BTU/Hr /ft2 /F /ft 1,233,490 Liters Calories (Kg) 3.968 BTU Acre-fee t/ hour 726 Cubic feet/Minute 1000 Calories (gm) 5430.86 Gallons/Minute 3088 Foot pounds 0.001558 Horse power hours Angstroms 1010 Meters 4185 JouIes Ares 0.01 Hectares 426.5 Kilogram meters 1076.39 Square Feet 0.0011628 Kilowatt hours 0.02471 Acres 1.1628 W att hours Atmospheres 76.0 Cms of Hg at 32 F Calories (Kg)/ 29.921 Inches of Hg at 32 F Cu meter 0.1 124 BTU/Cu foot at 0C 33.94 Feet of Water at 62 F Cal(Kg)/Hr/M 2 / 10,333 Kgs/Square meter C/M 0.671 BTU/Hr /ft2 /F /foot 14.6963 Pounds/Square inch 1.058 Tons/Square foot Calories (Kg)/Kg 1.8 BTU/pound 1013.15 Millibars Calories(Kg)/minute 51.43 Foot pounds/second 235.1408 Ounces/Square inch 0.09351 Horse power 0.06972 Kilowatt s Bags of cement 94 Pounds of cement Carats (diamond) 200 Milligram Bar 14.5 Pounds/square inch Centares (Centiares) 1 Square meters Barrels of oil 42 Gallons of oil (US) Centigram 0.01 Grams Barrels of cement 376 Pounds of cement ENGINEERING CentiIiters 0.01 Liters Barrels (not legal) 31 Gallons (US) DA or 31.5 Gallons (US) Centimeters 0.3937 Inches 0.032808 Feet T Board feet 144 X 1 in.* Cubic inches A 0.01 Meters Boiler horse power 33,479 BTU/hour 10 Millimeters 9.803 Kilowatt s Centimeters of Hg 34.5 Pounds of water evap- at 32 F 0.01316 Atmospheres orated /hour at 212 F 0.4461 Feet of water at 62F BTU 252.016 Calories (gm) 136 Kgs/Square meter 0.252 Calories ( Kg) 27.85 Pounds/Square foot 0.1934 Pounds/Square inch 777.54 Foot pounds 0.0003927 Horse power hours Centimeters/second 1.969 Feet/minute 1054.2 Joules 0.03281 Feet/second 107.5 Kilogram meters 0.036 Kilometers/hour 0.0002928 Kilowatt hours 0.6 Meters/minute 0 02237 Miles/hour BTU/Cu foot 8.89 Calories (Kg)/Cu meter 0.0003728 Miles/minute at 32 F Centimeters/ BTU/Hr/ft2/F /ft 0.00413 Cal (gm)/Sec/cm 2 /C/ second 2 0.03281 Feet/second2 cm 1.49 Cal (Kg)/Hr/M2/C/ Centipoise 0.000672 Pounds/sec foot Meter 2.42 Pounds/hour foot BTU/minute 12.96 Foot pounds/second 0.01 Poise 0.02356 Horse power Chains (Gunter s) 4 Rods 0.01757 Kilowatt s 66 Feet *For thickness less than 1 in. use actual thickness in decimals of an inch. 100 Links 106 CONVERSION FACTORS (Continued) Multiply by To Obtain Multiply by To Obtain Cheval-vapeur 1 Metric horse power Cubic yards/minute 0.45 Cubic fee t/second 75 Kilogram meters/second 3.367 Gallons (US)/second 0.98632 Horse power 12.74 Liters/second Circular inches 10 6 Circular mils Cubit 18 Inches 0.7854 Square inches Days (mean) 1440 Minutes 785,400 Square mils 24 Hours Circular mils 0.7854 Square mils 86,400 Seconds 10 6 Circular inches Days (sidereal) 86,164.1 Solar seconds 7.854 X 10 5 Square inches Decigrams 0.1 Grams Cubic centimeters 3.531 x 10 5 Cubic feet Deciliters 0.1 Liters 0.06102 Cubic inches Decimeters 0.1 Meters 10 6 Cubic meters Degrees (angle) 60 Minutes 1.308 X 10 6 Cubic yards 0.01745 Radians 0.0002642 Gallons (US) 3600 Seconds 0.001 Liters Degrees F (less 32) 0.5556 Degrees C 0.002113 Pint s (liq. US) 0.001057 Quarts (Iiq. US) Degrees F 1 (plus 460) Degrees F above absolute 0 0.0391 Ounces (fluid) Degrees C 1.8 (plus 32) Degrees F 1 (plus 273) Degrees C above absolute 0 Cubic feet 28,320 Cubic centimeters 1728 Cubic inches Degrees/second 0.01745 Radians/second 0.02832 Cubic meters 0.1667 Revolutions/minute 0.03704 Cubic yards 0.002778 Revolutions/second 7.48052 Gallons (US) Dekagrams 10 Grams 28.32 Liters Dekaliters 10 Liters 59.84 Pint s (liq. US) Dekameters 10 Meters 29.92 Quarts (liq. US) 5 Diameter (circle) 3.14159265359 Circumference 2.296 x 10 Acre feet (approx) 3.1416 0.803564 Bushels (approx) 3.14 2 2 Cubic feet of water 62.4266 Pounds at 39.2F (approx) /7 62.3554 Pounds at 62F Diameter (circle) 0.88623 Side of equal square Cubic fee t/minute 472 Cubic centimeters/sec 0.7071 Side of inscribed square 0.1247 Gallons (US)/second Diameter 3 (sphere) 0.5236 Volume (sphere) 0.472 Liters/second Diam (major) X 62.36 Pounds water/min at 62F diam (minor) 0.7854 Area of ellip se 7.4805 Gallons (US)/minute Diameter 2 (circle) 0.7854 Area (circle) 10,772 Gallons/24 hours 2 0.033058 Acre feet/24 hours Diameter (sphere) 3.1416 Surface (sphere) Diam (inches) X RPM 0.262 Belt speed f t/minute Cubic fee t/second 646,317 Gallons (US)/24 hours 448.831 Gallons/minute Digit s 0.75 Inches 1.98347 Acre feet/24 hours Drams (avoirdupois) 27.34375 Grains 0.0625 Ounces (avoir.) Cubic inches 16.387 Cubic centimeters 1.771845 Grams 0.0005787 Cubic feet A 1.639 X 10 5 Cubic meters Fathoms 6 Feet T 5 2.143 X 10 Cubic yards Feet 30.48 Centimeters DA 0.004329 Gallons (US) 12 Inches 0.01639 Liters 0.3048 Meters ENGINEERING 1 0.03463 Pint s (liq. US) /3 Yards 0.01732 Quarts (liq. US) .06061 Rods Cubic meters 10 6 Cubic centimeters Feet of water at 62 0.029465 Atmospheres 35.31 Cubic feet 0.88162 Inches of Hg at 32F 61,023 Cubic inches 62.3554 Pounds/square foot 1.308 Cubic yards 0.43302 Pounds/square inch 264.2 Gallons (US) 304.44 Kilogram/sq meter 1000 Liters Feet/minute 0.5080 Centimeters/second 2113 Pint s (liq. US) 0.01667 Feet/second 1057 Quarts (Iiq. US) 0.01829 Kilometers/hour Cubic meters/hour 4.40 Gallons (US)/minute 0.3048 Meters/minute Cubic yards 764,600 Cubic centimeters 0.01136 Miles/hour 27 Cubic feet Feet/second 30.48 Centimeters/second 46,656 Cubic inches 1.097 Kilometers/hour 0.7646 Cubic meters 0.5921 Knots 202 Gallons (US) 18.29 Meters/minute 764.6 Liters 1616 Pint s (liq. US) 807.9 Quarts (liq . US) 107 CONVERSION FACTORS (Continued) Multiply by To Obtain Multiply by To Obtain Feet/second 0.6818 Miles/hour Grams 1000 Milligrams 0.01136 Miles/minute 0.03527 Ounces (avoir.) Feet/second 2 30.48 Centimeters/second 2 0.03215 Ounces (troy) 0.3048 Meters/second 2 0.002205 Pounds Flat of a hexagon 1.155 Dist ance across corners Grams/centimeter 0.0056 Pounds/inch Flat of a square 1.414 Dist ance across corners Grams/cubic centi- meter 62.43 Pounds/cubic foot Foot pounds 0.0012861 BTU 0.03613 Pounds/cubic inch 0.32412 Calories (gm) 4.37 Grains/100 cubic f t. 0.0003241 Calories (Kg) 5.05 X 10 7 Horse power hours Grams/liter 58.417 Grains/gallon (US) 1.3558 Joules 8.345 Pounds/100 gallons (US) 0.13826 Kilogram meters 0.062427 Pounds/cubic foot 3.766 X 10 7 Kilowatt hours 1000 Part s/million 0.0003766 W att hours Gravity ( g ) 32.174 Feet/second 2 2 Foot pounds/minute 0.001286 BTU/minute 980.6 Centimeters/second 0.01667 Foot pounds/second Hand 4 Inches 3.03 X 10 5 Horse power 10.16 Centimeters 0.0003241 Calories (Kg)/minute Hectares 2.471 Acres 5 2.26 X 10 Kilowatt s 107,639 Square Feet Foot pounds/second 0.07717 BTU/minute 100 Ares 0.001818 Horse power Hectograms 100 Grams 0.01945 Calories (Kg)/minute 0.001356 Kilowatt s Hectoliters 100 Liters Furlong 40 Rods Hectometers 100 Meters 220 Yards Hectowatts 100 W att s 660 Feet Hogshead 63 Gallons (US) 0.125 Miles 238.4759 Liters 0.2042 Kilometers Horse power 42.44 BTU/minute Gallons (Imperial) 277.42 Cubic inches 33,000 Foot pounds/minute 4.543 Liters 550 Foot pounds/second 1.20095 Gallons (US) 1.014 Metric horse power Gallons (US) 3785 Cubic centimeters (Cheval vapeur) 0.13368 Cubic feet 10.7 Calories (Kg)/min 231 Cubic inches 0.7457 Kilowatt s 0.003785 Cubic meters 745.7 W att s 0.004951 Cubic yards Horse power(boiler) 33,479 BTU/hour 3.785 Liters 9.803 Kilowatt s ENGINEERING 8 Pint s (liq. US) 34.5 Pounds of water evapor- 4 Quarts (liq.