جدول تبدیل واحد(موازنه)

Calorific value (volumetric)
1 Btu/ft3 = 37.259 kJ/m3

Velocity
1 ft/s = 0.304 8 m/s
1 mile/h = 0.447 04 m/s

Volumetric Flow
1 ft3/s = 0.028 316 m3/s
1 ft3/h = 7.865 8 cm3/s
1 UK gal/h = 1.262 8 cm3/s
1 US gal/h = 1.051 5 cm3/s

Mass Flow
1 lb/h = 0.126 00 g/s
1 ton/h = 0.282 24 kg/s

Mass per unit area
1 lb/in2 = 703.07 kg/m2
1 lb/ft2 = 4.882 4 kg/m2
1 ton/sq mile = 392.30 kg/km2

Density
1 lb/in3 = 27.680 g/cm3
1 lb/ft3 = 16.019 kg/m3
1 lb/UK gal = 99.776 kg/m3
1 lb/US gal = 119.83 kg/m3

Pressure
1 lbf/in2 (psi) = 6.894 8 kN/m2
1 tonf/in2 = 15.444 MN/m2
1 lbf/ft2 = 47.880 N/m2
1 standard atm 101.325 kN/m2 (kPa)
1 bar = 105 N/m2
1 ft water = 2.989 1 kN/m2
1 in water = 249.09 N/m2
1 in Hg = 3.386 4 kN/m2
1 mm Hg (1 torr) 133.32 N/m2

Length
1 in = 25.4 mm
1 ft = 0.304 8 m
1 yd = 0.914 4 m
1 mile = 1.609 3 km
1 Å (angstrom)= 10-10m

Time
1 min = 60 s
1 h = 3.6 ks
1 day = 86.4 ks
1 year = 31.5 Ms

Area
1 in2 = 645.16 mm2
1 ft2 = 0.092 903 m2
1 yd2 = 0.836 13 m2
1 acre = 4046.9 m2
1 mile2 = 2.590 km2

Volume
1 in3 = 16.387 cm3
1 ft3 = 0.028 32 m3
1 yd3 = 0.764 53 m3
1 UK gal = 4546.1 cm3
1 US gal = 3785.4 cm3

Mass
1 oz = 28.352 g
1 lb = 0.453 592 37 kg
1 cwt = 50.802 3 kg
1 ton = 1016.06 kg
1 metric ton = 1000 kg

Force
1 pdl = 0.138 26 N
1 lbf = 4.448 2 N
1 kgf = 9.806 7 N
1 tonf = 9.964 0 kN
1 dyn = 10-5N

Temperature difference
1 deg F (degR) 5/9 deg C (deg K)

Power (heat flow)
1 hp (British) = 745.70 W
1 hp (metric) = 735.50 W
1 erg/s = 10-7 W
1 ft lbf/s = 1.355 8 W
1 Btu/h = 0.293 07 W
1 ton of refrigeration 3516.9 W

Energy (work, heat)
1 ft lbf = 1.355 8 J
1 ft pdl = 0.042 14 J
1 cal(int table) = 4.186 8 J
1 erg = 10-7 J
1 Btu = 1.055 06 kJ
1 hp h = 2.684 5 MJ
1 kWh = 3.6 MJ
1 therm = 105.51 MJ
1 thermie = 4.185 5 MJ

FORMULAE FOR CONVERTING ABSOLUTE TEMPERATURE:
0 ºC = 273 K

0 ºF = 460 ºR