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16 Conversión de las unidades de medida
Para resolver las eventuales dificultades que suele medida, presentamos a seguido una relación de las correspon-
dencias de las unidades más corrientes.
barrio
1 bar = 100 000 Pa
1 bar = 1.019 7 kg/cm²
1 bar = 750.06 mm Hg
1 bar = 10 197 mm H2O
1 bar = 14.504 psi
caloriá
1 cal = 4.185 5 J
1 cal = 10–6 th
1 kcal = 3.967 Btu
1 cal/h = 0.001 163 W
1 kcal/h = 1.163 W
cubic foot
1 cu ft = 28 316 8 dm³
1 cu ft = 1 728 cu in
foot
1 ft = 304.8 mm
1 ft = 12 in
gallon (U.S.A.)
1 gal = 3.785 33 dm³ or l
1 gal = 231 cu in
inch
1 in = 25.4 mm
kilo
1 kg = 2.205 62 lb
pound
1 lb = 453.592 37 g
metro cúbico
1 m³ = 1 000 dm³
1 m³ = 35.214 7 cu ft
1 dm³ = 61.024 cu in
1 dm³ = 0.035 3 cu ft
psi
1 psi = 0.068947 6 bar
watt
1 W = 1 J/s
1 W = 0.860 11 kcal/h
yarda
1 yd = 0.914 4 m
1 yd = 3 ft
1 yd = 36 in
Instrucciones de instalación
British thermal unit
caballos de vapor
cubic inch
gallon (U.K.)
horse power
julio
kg/cm²
metro
pascal
thermía
watt-hora
grado de temperatura
1 Btu = 1 055.06 J
1 Btu = 0.2521 kcal
1 ch = 0.735 5 kW
1 ch = 0.987 0 HP
1 cu in = 16.387 1 dm³
1 gal = 4.545 96 dm³ or l
1 gal = 277.41 cu in
1 HP = 0.745 7 kW
1 HP = 1.013 9 ch
1 J = 0.000 277 8 Wh
1 J = 0.238 92 cal
1 kg/cm² = 98 066.5 Pa
1 kg/cm² = 0.980 665 bar
1 kg/cm² = 10 000 mm H2O
1 kg/cm² = 735.557 6 mm Hg
1 m = 1.093 61 yd
1 m = 3.280 83 ft
1 m = 39.37 in
1 Pa = 1 N/m²
1 Pa = 0.007 500 6 mm Hg
1 Pa = 0.101 97 mm H2O
1 Pa = 0.010 197 g/cm²
1 Pa = 0.000 145 psi
1 MPa = 10 bar
1 th = 1 000 kcal
1 th = 10+6 cal
1 th = 4.185 5 x 10+6 J
1 th = 1.162 6 kWh
1 th = 3 967 Btu
1 Wh = 3 600 J
1 kWh = 860 kcal
0 °K = —273.16 °C
0 °C = 273.16 °K
t °C = 5/9 (t °F-32)
t °F = 1.8 t °C + 32
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