acres top 43,560 square feet acres 6,272,640 square inches acres 4047 square meters acres 1.562 x 10-3 square miles acres 4840 square yards acre-feet 43,560 cubic-feet acre-feet 3.259 x 105 gallons amperes per square cm 6.452 amperes per square inch ampere-turns 1.257 gilberts ares 0.02471 acres atmospheres 29.92 inches of mercury atmospheres 33.90 feet of water atmospheres 14.70 pounds per square inch atmospheres 1.058 tons per square foot bars 0.9869 atmospheres bars 106 dynes per square cm. bars 2,089 pounds per square foot bars 14.50 pounds per square inch board-feet 144 sq. in. x 1 cubic inches British thermal units 778.30 foot-pounds British thermal units 3.931 x 10-4 horse-power-hours British thermal units 1055 joules British thermal units 0.2520 kilogram-calories British thermal units 107.60 kilogram-meters British thermal units 2.930 x 10-4 kilowatts-hours B.T.U. per minute 12.97 foot-pound per second B.T.U. per minute 0.02357 horse-power B.T.U. per minute 0.01758 kilowatts B.T.U. per minute 17.58 watts B.T.U. per sq. ft. per. min. 0.1221 watts per square inch bushels 1.244 cubic feet bushels 2150 cubic inches bushels 0.03524 cubic meters bushels 4 pecks bushels 64 pints (dry) bushels 32 quarts (dry) centigrams 0.01 grams centiliters 0.01 liters centimeters 3.281 x 10-2 feet centimeters 0.3937 inches centimeters 0.01 meters centimeters 6.214 x 10-6 miles centimeters 10 millimeters centimeters 393.70 mils centimeters 1.094 x 10-2 yards centimeter-dynes 7.376 x 10-8 pound-feet centimeter-grams 980.70 centimeter-dynes centimeter-grams 7.233 x 10-5 pound-feet centimeters of mercury 0.01316 atmospheres centimeters of mercury 0.4461 feet of water centimeters of mercury 136.00 kgs. per square meter centimeters of mercury 27.85 pounds per square foot centimeters of mercury 0.1934 pounds per square inch centimeters per second 1.969 feet per minute centimeters per second 0.03281 feet per second centimeters per second 0.036 kilometers per hour centimeters per second 0.60 meters per minute centimeters per second 0.02237 miles per hour centimeters per second 3.728 x 10-4 miles per minute cms. per sec. per sec. 0.03281 feet per second per second cms. per sec. per sec. 0.036 kms. per hour per second cms. per sec. per sec. 0.02237 miles per hour per second circular mils 5.067 x 10-6 square centimeters circular mils 7.854 x 10-7 square inches circular mils 0.7854 square mils cord - feet 4 ft. x 4 ft. x 1 ft. cubic feet cords 8 ft. x 4 ft. x 4 ft. cubic feet cubic centimeters 6.102 x 10-2 cubic inches cubic centimeters 3.531 x 10-5 cubic feet cubic centimeters 10-6 cubic meters cubic centimeters 1.308 x 10-6 cubic yards cubic centimeters 2.642 x 10-4 gallons cubic centimeters 10-3 liters cubic centimeters 2.113 x 10-3 pints (liquid) cubic centimeters 1.057 x 10-3 quarts (liquid) cubic feet 2.832 x 104 cubic cms. cubic feet 1728 cubic inches cubic feet 0.02832 cubic meters cubic feet 0.03704 cubic yards cubic feet 7.481 gallons cubic feet 28.32 liters cubic feet 59.84 pints (liquid) cubic feet 29.92 quarts (liquid) cubic feet per minute 472.00 cubic cms. per second cubic feet per minute 0.1247 gallons per second cubic feet per minute 0.4720 liters per seconds cubic feet per minute 62.40 Ibs. of water per minute cubic inches 16.39 cubic centimeters cubic inches 5.787 x 10-4 cubic feet cubic inches 1.639 x 10-5 cubic meters cubic inches 2.143 x 10-5 cubic yards cubic inches 4.329 x 10-3 gallons cubic inches 1.639 x 10-2 liters cubic inches 1.061 x 105 mil-feet cubic inches 0.03463 pints (liquid) cubic inches 0.01732 quarts (liquid) cubic inches 106 cubic centimeters cubic meters 35.31 cubic feet cubic meters 61,023 cubic inches cubic meters 1.308 cubic yards cubic meters 264.20 gallons cubic meters 103 liters cubic meters 2113 pints (liquid) cubic meters 1057 quarts (liquid) cubic yards 7.646 x 105 cubic centimeters cubic yards 27 cubic feet cubic yards 46,656 cubic inches cubic yards 0.7646 cubic meters cubic yards 202.00 gallons cubic yards 764.60 liters cubic yards 1616 pints (liquid) cubic yards 807.90 quarts (liquid) cubic yards per minute 0.45 cubic feet per second cubic yards per minute 3.367 gallons per second cubic yards per minute 12.74 liter per second days 24 hours days 1440 minutes days 86,400 seconds decigrams 0.10 grams deciliters 0.10 liters decimeters 0.10 meters degrees (angle) 60 minutes degrees (angle) 0.01745 radians degrees (angle) 3600 seconds degrees per second 0.01745 radians per second degrees per second 0.1667 revolutions per minute degrees per second 0.002778 revolutions per second dekagrams 10 grams dekaliters 10 liters dekameters 10 meters drams 1.772 grams drams 0.0625 ounces dynes 1.020 x 10-3 grams dynes 7.233 x 10-5 poundals dynes 2.248 x 10-6 pounds ergs 9.480 x 10-11 British thermal units ergs 1 dyne-centimeters ergs 7.378 x 10-8 foot-pounds ergs 1.020 x10-3 gram-centimeters ergs 10-7 joules ergs 2.389 x10-11 kilogram-calories ergs 1.020 x 10-8 kilogram-meters ergs per second 5.688 x 10-9 B.T.U. per minute ergs per second 4.427 x 10-6 foot-pounds per minute ergs per second 7.378 x 10-8 foot-pounds per second ergs per second 1.341 x 10-10 horse power ergs per second 1.433 x 10-9 kg. - calories per minute ergs per second 10-10 kilowatts farads 106 microfarads fathoms 6 feet feet 30.48 centimeters feet 12 inches feet 0.3048 meters feet 1.894 x 104 miles feet 1/3 yard feet of water 0.0295 atmospheres feet of water 0.8826 inches of mercury feet of water 304.80 kgs. - per square meter feet of water 62.43 pounds per square foot feet of water 0.4335 pounds per square inch feet per minute 0.5080 centimeters per second feet per minute 0.01667 feet per second feet per minute 0.01829 kilometers per hour feet per minute 0.3048 meters per minute feet per minute 0.01136 miles per hour feet per second 30.48 centimeters per second feet per second 1.097 kilometers per hour feet per second 0.5921 knots feet per second 18.29 meters per minute feet per second 0.6818 miles per hour feet per second 0.01136 miles per minute feet per 100 feet 1 per cent grade feet per second per second 30.48 cms. per second per second feet per second per second 1.097 kms. per hour per second feet per second per second 0.3048 meters per second per second feet per second per second 0.6818 miles per hour per second foot-pounds 1.285 x 10-3 British thermal units foot-pounds 1.356 x 107 ergs foot-pounds 5.050 x 10-7 horse-power-hours foot-pounds 1.356 joules foot-pounds 3.238 x 10-4 kilogram-calories foot-pounds 0.1383 kilogram-meters foot-pounds 3.766 x 10-7 kilowatt-hours foot-pounds per minute 1.285 x 10-3 B.T.U. per minute foot-pounds per minute 0.01667 foot-pound per second foot-pounds per minute 3.030 x 10-5 horse-power foot-pounds per minute 3.238 x 10-4 kg.- calories per minute foot-pounds per minute 2.260 x 10-5 kilowatts foot-pounds per second 7.709 x 10-2 B.T.U. per minute foot-pounds per second 1.818 x 10-3 horse-power foot-pounds per second 1.356 x 10-3 kilowatts furlongs 40 rods gallons 3785 cubic centimeters gallons 0.1337 cubic feet gallons 231 cubic inches gallons 3.785 x 10-3 cubic meters gallons 4.951 x 10-3 cubic yards gallons 3.785 liters gallons 8 pints (liquid) gallons 4 quarts (liquid) gallons per minute 2.228 x 10-3 cubic feet per second gallons per minute 0.06308 liters per second gausses 6.452 liters per inch gilberts 0.7958 ampere-turns gills 0.1183 liters gills 0.25 pints (liquid) grains 0.06480 grams grains 0.04167 pennyweights (troy) grams 980.70 dynes grams 15.43 grains grams 10-3 kilograms grams 103 milligrams grams 0.03527 ounces grams 0.03215 ounces (troy) grams 0.07093 poundals grams 2.205 x 10-3 pounds gram-calories (IT) 3.968 x 10-3 B.T.U. gram-centimeters 9.297 x 10-8 B.T.U. gram-centimeters 980.70 ergs gram-centimeters 7.235 x 10-5 foot-pounds gram-centimeters 9.807 x 10-5 joules gram-centimeters 2.343 x 10-8 kilograms-calories gram-centimeters 10-5 kilogram-meters grams per cm. 5.600 x 10-3 pounds per inch grams per cubic cm. 62.43 pounds per cubic foot grams per cubic cm. 0.03613 pounds per cubic inch hectares 2.471 acres hectares 1.076 x 105 square feet hectograms 100 grams hectoliters 100 liters hectometers 100 meters hectowatts 100 watts hemispheres (solid angle) 0.50 sphere hemispheres (solid angle) 4 spherical right angles hemispheres (solid angle) 6.283 stradians henries 103 millihenries horse-power 42.40 B.T.U. per minute horse-power 33,000 foot-pounds per minute horse-power 550 foot-pounds per second horse-power 1.014 horse-power (metric) horse-power 10.68 kg. calories per minute horse-power 0.7457 kilowatts horse-power 745.70 watt horse-power (boiler) 33.520 B.T.U. per hour horse-power (boiler) 9.804 kilowatt horse-power-hours 2544 British thermal units horse-power-hours 1.98 x 106 foot-pounds horse-power-hours 2.684 x 106 joules horse-power-hours 641.10 kilogram-calories horse-power-hours 2.737 x 105 kilogram-meters horse-power-hours 0.7455 kilowatt-hours hours 4.167x10-2 days hours 60 minutes hours 3600 seconds hours 5.952 x 10-3 weeks inches 2.540 centimeters inches 8.333 x 10-2 feet inches 1.578 x 10-5 miles inches 103 mils inches 2.778 x 10-2 yards inches of Mercury 0.03342 atmospheres inches of Mercury 1.133 feet of water inches of Mercury 345.30 kg. per square meter inches of Mercury 70.73 pounds per square foot inches of Mercury 0.4912 pounds per square inch inches of water 0.00 atmospheres inches of water 0.07355 inches of mercury inches of water 25.40 kg. per square meter inches of water 0.5781 ounces per square inch inches of water 5.202 pounds per square foot inches of water 0.03613 pounds per square inch joules (int.) 9.480 x 10-4 B.T.U. joules (Int.) 107 ergs joules (Int.) 0.7378 foot-pounds joules (Int.) 2.389 x 10-4 kilograms-calories joules (Int.) 0.1020 kilogram-meters joules (Int.) 2.778 x 10-4 watt-hours kilograms 980,665 dynes kilograms 103 grams kilograms 70.93 poundals kilograms 2.205 pounds kilograms 1.102 x 10-3 tons (short) kilogram-calories 3.968 B.T.U. kilogram-calories 3088 foot pounds kilogram-calories 1.560 x 10-3 horse-power-hours kilogram-calories 4186 joules kilogram-calories 427.00 kilogram-meters kilogram-calories 1.163 x 10-3 kilowatt-hours kilogram-calories per minute 51.47 foot-pound per second kilogram-calories per minute 0.09358 horse-power kilogram-calories per minute 0.06977 kilowatt kilograms-cm squared 2.373 x 10-3 pounds-feet squared kilograms-cm squared 0.3417 pounds-inches squared kilograms-meters 9.294 x 10-3 B.T.U. kilograms-meters 9.804 x 107 ergs kilograms-meters 7.233 foot-pounds kilograms-meters 9.804 Joules kilograms-meters 2.342 x 10-3 kilogram-calories kilograms-meters 2.723 x 10-6 kilowatt-hours kilograms per cubic meter 10-3 grams per cubic cm. kilograms per cubic meter 0.06243 pounds per cubic foot kilograms per cubic meter 3.613 x 10-5 pounds per cubic inch kilograms per cubic meter 3.405 x 10-10 pounds per mil foot kilograms per meter 0.6720 pounds per foot kilograms per square meter 9.678 x 10-5 atmospheres kilograms per square meter 98.07 x 10-6 bars kilograms per square meter 3.281 x 10-3 feet of water kilograms per square meter 2.896 x 10-3 inches of mercury kilograms per square meter 0.2048 pounds per square foot kilograms per square meter 1.422 x 10-3 pounds per square inch kilograms per square millimeter 106 kg. per square meter kilolines 103 maxwells kiloliters 103 liters kilometers 105 centimeters kilometers 3281 feet kilometers 3.937 x 104 inches kilometers 103 meters kilometers 6214 miles kilometers 1094 yards kilometers per hour 27.78 centimeters per second kilometers per hour 54.68 feet per minute kilometers per hour 0.9113 feet per second kilometers per hour 0.5396 knots kilometers per hour 16.67 meters per minute kilometers per hour 0.6214 miles per hour kilometers per hour per second 0.9113 feet per second per second kilometers per hour per second 0.2778 meters per second per second kilometers per hour per second 0.6214 miles per hour per second kilowatts 56.88 B.T.U. per minute kilowatts 4.427 x 104 foot-pounds per minute kilowatts 737.80 foot-pounds per second kilowatts 1.341 horse-power kilowatts 14.33 kg. calories per minute kilowatts 103 watts kilowatts-hours 3413 B.T.U. kilowatts-hours 2.656 X 106 foot-pounds kilowatts-hours 1.341 horse-power-hours kilowatts-hours 3.6x 106 joules kilowatts-hours 860 kilograms-calories kilowatts-hours 3.672 x 105 kilograms-meters knots (length) 6080 feet knots (length) 1.853 kilometers knots (length) 1.152 miles knots (length) 2027 yards knots (speed) 51.48 centimeters per second knots (speed) 1.689 feet per second knots (speed) 1.853 kilometers per hour knots (speed) 1.152 miles per hour lines per square cm 1 gausses lines per square inch 0.1550 gausses links (engineer's) 12 inches links (surveyor's) 7.92 inches liters 103 cubic centimeters liters 0.03531 cubic feet liters 61.02 cubic inches liters 10-3 cubic meters liters 1.308 x 10-3 cubic yards liters 0.2642 gallons liters 2.113 pints (liquid) liters 1.057 quarts (liquid) liters per minute 5.885x10-4 cubic feet per second liters per minute 4.403 x 10-3 gallons per second lumens per square foot 1 foot-candles maxwells 10-3 kilolines megalines 106 maxwells megohms 106 ohms meters 100 centimeters meters 3.281 feet meters 39.37 inches meters 10-3 kilometers meters 6.214 x 10-4 miles meters 103 milimeters meters 1.094 yards meters-kilograms 9.807 x 107 centimeter-dynes meters-kilograms 105 centimeter-grams meters-kilograms 7.233 pound-feet meters per minute 1.667 centimeters per second meters per minute 3.281 feet per minute meters per minute 0.05468 feet per second meters per minute 0.06 kilometers per hour meters per minute 0.03728 miles per hour meters per second 196.80 feet per minute meters per second 3.281 feet per second meters per second 3.60 kms. per hour meters per second 0.06 kms. per minute meters per second 2.237 miles per hour meters per second 0.03728 miles per minute meters per second per second 3.281 feet per second per second meters per second per second 3.60 kms. per hour per second meters per second per second 2.237 miles per hour per second microfarads 10-6 farads micrograms 10-6 grams microliters 10-6 liters microhms 10-12 megohms microhms 10-6 ohms microns 10-6 meters miles 1.609 x105 centimeters miles 5280 feet miles 6.336 x 104 inches miles 1609 kilometers miles 1760 yards miles per hour 44.70 centimeters per second miles per hour 88 feet per minute miles per hour 1.467 feet per second miles per hour 1.609 kilometers per hour miles per hour 0.8684 knots miles per hour 26.82 meters per minute miles per hour per second 44.70 cm. per sec. per sec. miles per hour per second 1.467 feet per sec. per sec. miles per hour per second 1.609 km per hour per second miles per hour per second 0.4470 meters per second per second miles per minute 2682 centimeters per second miles per minute 88 feet per second miles per minute 1.609 kilometers per minute miles per minute 2682 centimeters per second miles per minute 88 feet per second miles per minute 1.609 kilometers per minute miles per minute 52.10 knots miles per minute 60 miles per hour mil-feet 9.425 x 10-6 cubic inches milliers 103 kilograms milligrams 10-3 grams millihenries 10-3 henries milliliters 10-3 liters millimeters 0.10 centimeters millimeters 3.281 x 10-3 feet millimeters 0.03937 inches millimeters 6.214x 10-7 miles millimeters 39.37 mils millimeters 1.094 x 10-3 yards mils 2.540 x 10-3 centimeters mils 8.333 x 10-5 feet mils 10-3 inches mils 2.540 x 10-8 kilometers mils 2.778 x 10-5 yards miner's inches 1.50 cubic feet per minute minutes 6.944 x 10-4 days minutes 1.667 x 10-2 hours minutes 9.921 x 10-5 weeks minutes (angle) 2.909 x 10-4 radians minutes (angle) 60 seconds months 30.42 days months 730 hours months 43,800 minutes months 2.628 x 106 seconds myriagrams 10 kilograms myriameters 10 kilometers myriawatts 10 kilowatts ohms 10-6 megohms ohms 106 microhms ounces 16 drams ounces 437.50 grains ounces 28.35 grams ounces 0.0625 pounds ounces (fluid) 1.805 cubic inches ounces (fluid) 0.02957 liters ounces (troy) 480 grains ounces (troy) 31.10 grams ounces (troy) 20 pennyweights (troys) ounces (troy) 0.08333 pounds (troy) ounces per square inch 0.0625 pounds per square inch pennyweights (troy) 24 grains pennyweights (troy) 1.555 grams pennyweights (troy) 0.05 ounces (troy) perches (masonry) 24.75 cubic feet pints (dry) 33.60 cubic inches pints (liquid) 473.20 cubic centimeters pints (liquid) 1.671 x 10-2 cubic feet pints (liquid) 28.87 cubic inches pints (liquid) 4.732 x 10-4 cubic meters pints (liquid) 6.189 x 10-4 cubic yards pints (liquid) 0.125 gallons pounds 16 ounces pounds 256 drams pounds 7000 grains pounds 0.0005 tons (short) pounds 453.5924 grams pounds 1.21528 pounds (troy) pounds 14.5833 ounces (troy) pounds (troy) 5760 grains pounds (troy) 240 pennyweights (troy) pounds (troy) 12 ounces (troy) pounds (troy) 373.24177 grams pounds (troy) 0.82 pounds (avoir.) pounds (troy) 13.1657 ounces (avoir.) pounds (troy) 3.6735 x 10-4 tons (long) pounds (troy) 4.1143 x 10-4 tons (short) pounds (troy) 3.7324 x 10-4 tons (metric) pounds of water 0.01602 cubic feet pounds of water 27.68 cubic inches pounds of water 0.1198 gallons pounds of water/minute 2.670 x 10-4 cubic feet/second pounds/cubic foot 0.01602 grams/cubic centimeters pounds/cubic foot 16.02 kilograms/cubic meters pounds/cubic foot 5.787 x 10-4 pounds/cubic inch pounds/cubic inch 27.68 grams/cubic centimeters pounds/cubic inch 2.768 x 104 kilograms/cubic meter pounds/cubic inch 1728 pounds/cubic foot pounds/foot 1.488 kilograms/meter pounds/inch 178.60 grams/centimeters pounds/square foot 0.01602 feet of water pounds/square foot 4.883 kilograms/square meter pounds/square foot 6.945 x 10-3 pounds/square inches pounds/square inch 0.06804 atmospheres pounds/square inch 2.307 feet of water pounds/square inch 2.036 inches of mercury pounds/square inch 703.10 kilograms/square meter quadrants (angle) 90 degrees quadrants (angle) 5400 minutes quadrants (angle) 1.571 radians quarts (dry) 67.20 cubic inches quarts (liquid) 57.75 cubic inches radians 57.30 degrees radians 3438 minutes radians 0.637 quadrants radians per second 57.30 degrees per second radians per second 0.1592 revolutions per second radians per second 9.549 revolutions per minute radians per second per second 573.00 revs. per minute per minute radians per second per second 9.549 revs. per minute per second radians per second per second 0.1592 revs. per second per second reams 500 sheets revolutions 360 degrees revolutions 4 quadrants revolutions 6.283 radians revolutions per minute 6 degrees per second revolutions per minute 0.1047 radians per second revolutions per minute 0.01667 revolutions per second revolutions per minute per minute 1.745 x 10-3 radians per second per second revolutions per minute per minute 0.01667 revs. per minute per second revolutions per minute per minute 2.778 x 10-4 revs. per second per second revolutions per second 360 degrees per second revolutions per second 6.283 radians per second revolutions per second 60 revolutions per minute revolutions per second per second 6.283 radians per second per second revolutions per second per second 3600 revs. per minute per minute revolutions per second per second 60 revs. per minute per second rods 16.5 feet seconds 1.157 x 10-5 days seconds 2.778 x 10-4 hours seconds 1.667 x 10-2 minutes seconds 1.654 x 10-6 weeks seconds (angle) 4.848 x 10-6 radians spheres (solid angle) 12.57 steradians spherical right angles 0.25 hemispheres spherical right angles 0.125 spheres spherical right angles 1.571 steradians square centimeters 1.973 x 105 circular mils square centimeters 1.076 x 10-3 square feet square centimeters 0.1550 square inches square centimeters 10-4 square meters square centimeters 3.861 x 10-11 square miles square centimeters 100 square milimeters square centimeters 1.196 x 10-4 square yards square feet 2.296 x 10-5 acres square feet 1.833 x 108 circular mils square feet 929.00 square centimeters square feet 144 square inches square feet 0.09290 square meters square feet 3.587 x 10-8 square miles square feet 1/9 square yards square feet-feet squared 2.074 x 104 square inches-inches squared square inches 1.273 x 106 circular mils square inches 6.452 square centimeters square inches 6.944 x 10-3 square feet square inches 645.20 square millimeters square inches 106 square mils square inches 7.716 x 10-4 square yards square kilometers 247.10 acres square kilometers 10.76 x 106 square feet square kilometers 1.550 x 109 square inches square kilometers 0.3861 square miles square kilometers 1.196 x 106 square yards square meters 2.471 x 10-4 acres square meters 10.76 square feet square meters 1550 square inches square meters 3.861 x 10-7 square miles square meters 1.196 square yards square miles 640 acres square miles 27.88 x 106 square feet square miles 2.590 square kilometers square miles 3.098 x 106 square yards square millimeters 1.973 x 103 circular mils square millimeters 0.01 square centimeters square millimeters 1.550 x 10-3 square inches square mils 1.273 circular mils square mils 6.452 x 10-6 square centimeters square mils 10-6 square inches square yards 2.066 x 10-4 acres square yards 9 square feet square yards 1296 square inches square yards 0.8361 square meters square yards 3.228 x 10-7 square miles steradians 0.1592 hemispheres steradians 0.07958 spheres steradians 0.6366 spherical right angles steradians 103 liters temperature (°C) +273 1 Abs. temperature (°C) temperature (°C) +17.78 1.8 temperature (°F) temperature (°F) +460 1 Abs. temperature (°F) temperature (°F) -32 5/9 temperature (°C) tons (long) 1016 kilogram tons (long) 2240 pounds tons (metric) 103 kilograms tons (metric) 2205 pounds tons (short) 907.20 kilograms tons (short) 2000 pounds tons (short) per square foot 13.89 pounds per square inch tons (short) per square inch 2000 pounds per square inch watts 0.05688 B.T.U. per minute watts 107 ergs per second watts 44.27 foot-pounds per minute watts 0.7378 foot-pounds per second watts 1.341 x 10-3 horse-power watts 10-3 kilowatts watt-hours 3.413 B.T.U. watt-hours 2656 foot-pounds watt-hours 1.341 x 10-3 horse-power-hours watt-hours 0.860 kilogram-calories watt-hours 367.20 kilogram-meters webers 108 maxwells weeks 168 hours weeks 10,181 minutes weeks 604,800 seconds yards 91.44 centimeters yards 3 feet yards 36 inches yards 0.9144 meters yards 5.682 x 10-4 miles years (common) 365 days years (common) 8760 hours years (leap) 366 days years (leap) 8784 hours