Conversion Factor Table http://www.et.byu.edu/~jww8 Copyright © by Jon Wittwer Multiple by To Get hp 2544.5 Btu / hr m / s 3.60 km / h inch 2.54 cm hp 745.70 W (watt) m / s 3.2808 ft / s This can also be written as: 1 inch = 2.54 cm hp 0.74570 kW m / s 2.237 mi / h (mph) A acre 43,560 ft2 hp 33,000 ft·lbf / min m / s2 3.2808 ft / s2 ampere·hr (A·h) 3,600 coulomb (C) hp 550 ft·lbf / sec metric ton 1000 kg hp·hr 2544 Btu ångström (Å) 1x10-10 m mil 0.001 in 6 atm (atmosphere) 1.01325 bar hp·hr 1.98x10 ft·lbf mi (mile) 5280 ft atm, std 76.0 cm of Hg hp·hr 2.68x106 J mi 1.6093 km atm, std 760 mm of Hg at 0ºC in 2.54* cm mi2 (square mile) 640 acres atm, std 33.90 ft of water in of Hg 0.0334 atm mph (mile/hour) 1.6093 km / hr atm, std 29.92 in of Hg at 30ºF in of Hg 13.60 in of water mph 88.0 ft / min (fpm) atm, std 14.696 lbf/in2 abs (psia) in of Hg 3.387 kPa mph 1.467 ft / s atm, std 101.325 kPa in of water 0.0736 in of Hg mph 0.4470 m / s 2 -6 atm, std 1.013x105 Pa in of water 0.0361 lbf / in (psi) micron 1x10 m in of water 0.002458 atm -3 atm, std 1.03323 kgf / cm2 mm of Hg 1.316x10 atm -4 atm, std 14.696 psia J J (joule) 9.4782x10 Btu mm of Hg 0.1333 kPa B bar 0.9869 atm, std J 6.2415x1018 eV mm of water 9.678x10-5 atm bar 1x105 Pa J 0.73756 ft·lbf N N (newton) 1 kg·m / s2 J1N·m Btu 778.169 ft·lbf N 1x105 dyne 7 Btu 1055.056 J J 1x10 ergs µN (microN) 0.1 dyne Btu 5.40395 psia·ft3 J / s 1 W N 0.22481 lbf K kg (kilogram) 2.2046226 lbm (pound mass) Btu 2.928x10-4 kWh N·m 0.7376 ft·lbf -5 kg 0.068522 slug N·m 1 J Btu 1x10 therm -3 kg 1x10 metric ton 2 Btu / hr 1.055056 kJ / hr P Pa (pascal) 1 N / m 3 3 Btu / hr 0.216 ft·lbf / sec kg / m 0.062428 lbm / ft Pa 1.4504x10-4 lbf / in2 (psia) kgf 9.80665 newton (N) Btu / hr 3.929x10-4 hp 2 kip 1000 lbf Pa 0.020886 lbf / ft Btu / hr 0.2931 W -6 kip 4448 N Pa 9.869x10 atm Btu / lbm 2.326* kJ / kg 3 Pa·s 10 poise 2 2 kJ 1 1 kPa·m Btu / lbm 25,037 ft / s 2 kJ 1000 N·m psi (pounds per square inch) --- see lbf / in Btu / lbm·R 4.1868 kJ / kg·K kJ 0.94782 Btu R radian 180/π degree Btu / lbm·°F 4.1868 kJ / kg·°C kJ 737.56 ft·lbf S short ton 2000 lbm Btu / lbmol·R 4.1868 kJ / kmol·K 2 2 short ton 907.1847 kg -3 kJ / kg 1000 m / s C cal (g-calorie) 3.968x10 Btu slug 32.174 lbm -6 kJ / kg 0.42992 Btu / lbm cal 1.560x10 hp·hr kJ / kg·K 0.23885 Btu / lbm·°R slug 14.5939 kg cal (IT calorie) 4.1868 J kJ / kg·ºC 1 kJ / kg·K slug / ft3 0.5154 g / cm3 Calorie (Cal) 4.1868 kJ kJ / kg·ºC 1 J / g·ºC stokes 1x10-4 m2 / s cal / sec 4.1868 W (watt) kJ / kg·ºC 0.23885 Btu / lbm·ºF 5 cm (centimeter) 0.03281 ft T therm 1x10 Btu kJ / kg·ºC 0.23885 Btu / lbm·R ton of refrigeration 200 Btu / min cm 0.3937 in km 3280.8 ft cP (centipoise) 0.001 Pa·sec W W (watt) 3.4121 Btu / hr km 0.6214 mi W 0.7376 ft·lbf / sec cSt (centistokes) 1x10-6 m2 / sec km/hr 0.6214 mi / hr (mph) W 1.341x10-3 hp D degree π/180 radian km/hr 0.2778 m/s W1 J / s dyne 10 µN (micronewton) km/hr 0.9113 ft/s -3 W / cm2 1x104 W / m2 E -19 kPa (kilopascal) 9.8693x10 atm eV (electronvolt) 1.602x10 J 3 6 3 -7 kPa 0.14504 lbf / in2 (psi) W / cm 1x10 W / m erg 1x10 J 2 2 F ft (feet) 0.3048* m kW 3412.14 Btu / hr W / m 0.3171 Btu / (h·ft ) ft 30.48 cm kW 0.9478 Btu / sec W / m3 0.09665 Btu / (h·ft3) ft2 2.2957x10-5 acre kW 737.56 lbf·ft / sec W / m·ºC 1 W / m·K kW 1.341 hp W / m·ºC 0.57782 Btu / (h·ft·ºF) ft2 144 in2 kWh (kW-hour) 3412.14 Btu W / (m2·ºC) 1 W / (m2·K) ft2 0.09290304* m2 kWh 1.341 hp·hr W / (m2·ºC) 0.17612 Btu / (h·ft2·ºF) ft3 7.481 gal (U.S.) kWh 3600 kJ weber / m2 10,000 gauss ft3 0.02832 m3 L L (liter) 0.03531 ft3 3 3 ft 28.317 L L 61.02 in * The exact conversion between metric and English. ft3 / lbm 0.062428 m3 / kg L 0.2642 gal (U.S.) 3 ft·lbf 1.285x10-3 Btu L 0.001 m TEMPERATURE ft·lbf 1.35582 J L / s 2.119 ft3 / min (cfm) T(K) = T(ºC) + 273.15 T(R) = T(ºF) + 459.67 ft·lbf 3.766x10-7 kWh L / s 15.85 gal / min (gpm) 2 T(ºF) = 1.8 T(ºC) + 32 ft·lbf 1.35582 N·m lbf (pound force) 32.174 lbm·ft / s ft·lbf 0.324 calorie (g-cal) lbf 4.44822 N -3 lbf 32.17 poundals SOME IMPORTANT CONSTANTS ft·lbf / sec 1.818x10 hp -27 2 2 lbf / in2 (psi) 0.06805 atm Atomic Mass Unit (u) = 1.66054x10 kg ft / s 0.3048* m / s 23 2 Avogadro’s number (NA) = 6.02213x10 particles/mol G U.S. gallon (gal) 0.13368 ft3 lbf / in 2.307 ft water 2 -23 gal 3.7854 L lbf / in 2.036 in Hg Boltzmann’s constant (kB)= 1.38065x10 J / K -19 gal 3.7854x10-3 m3 lbf / in2 6894.757 Pa electron charge (e) = -1.6022x10 C 3 lbm 0.45359237* kg -31 gal 231 in electron mass (me) = 9.10939x10 kg gal (U.K.) 1.201 gal (U.S.) lbm 0.031081 slug -27 3 3 proton mass (mp) = 1.6726x10 kg gal (U.K.) 277.4 in3 lbm / in 1728 lbm / ft 3 3 Gas Constant (R) = 8314 J / kmol·K gal / min (gpm) 0.002228 ft3 / sec lbm / ft 0.016018 g / cm -11 2 2 3 3 Gravitational Constant (G)= 6.672x10 N·m / kg -9 lbm / ft 16.018 kg / m gamma (γ,Γ) 1x10 tesla (T) Gravity (mean) = 9.8067 (9.81) m / s2 M m (meter) 3.28083 ft -4 -34 gauss 1x10 T m 1.0926 yard Planck’s constant (h) = 6.6260x10 J·s -3 gram (g) 2.205x10 lbm m 39.370 in Speed of Light (c) = 2.99792458x108 m/s (exact) 3 g / cm 11 kg / Lm2 1550 in2 3 3 SI PREFIXES g / cm 1000 kg / m m2 10.764 ft2 3 3 yocto (10-24), zepto (10-21), atto (10-18), femto (10-15), pico g / cm 62.428 lbm / ft m3 1x106 cm3 (cc) 3 3 (10-12), nano (10-9), micro (10-6), milli (10-3), centi (10-2), g / cm 1.940 slug / ft m3 35.315 ft3 3 3 deci (10-1), deka (101), hecto (102), kilo (103), mega (106), g / cm 0.036127 lbm / in m3 264.17 gal (U.S.) 4 2 giga (109), tera (1012), peta (1015), exa (1018), zetta (1021), H hectare 1x10 m m3 1000 L yotta (1024) hectare 2.47104 acres m3 / kg 16.02 ft3 / lbm hp (horsepower) 42.41 Btu / min m / s 196.8 ft / min hp 0.7068 Btu / sec.