1. Equivalencias de unidades inglesas y métricas
Longitud
plg pie yd mm m Km
-5
1 plg (in) 1 0.08333 0.02778 25.4 0.0254 2.54x10
-4
1 pie (ft) 12 1 0,333 304,8 0.3048 3.048x10
-4
1 yd 36 3 1 914,4 0.9144 9.14x10
-6 -6 -6
1 mm 0.03937 3281x10 1094x10 1 0.001 10
-5
1 cm 0.3937 0.0328083 .010936 10 0.01 10
1m 39.37 3.281 1.094 1000 1 0,001
6
1 km 39370 3281 1094 10 1000 1
Área
2 2 2 2 2 2
plg pie yd cm dm m
2 3 -4 -5
1 plg 1 6.9x10 7.72x10 6,452 0.06452 64.5x10
2
1 pie 144 1 0,1111 929 9.29 0.0929
2
1 yd 1296 9 1 8361 83.61 0.8361
2 -3 -4
1 cm 0.155 1.07x10 1.20x10 1 0.01 0.0001
2
1 dm 15.5 0.1076 0.01196 100 1 0.01
2
1m 1550 10.76 1.196 10000 100 1
Volumen
3 3 3 3 3 3
plg pie yd cm dm m
3 -4 -5 -5
1 plg 1 5.79x10 2.14x10 16.39 0.01639 1.64x10
3
1 pie 1728 1 0,037 28320 28.32 0.02832
3
1 yd 46656 27 1 764555 764.55 0.765
3 -8 -6 -6
1 cm 0.06102 3531x10 1.31 10 1 0.001 10
3
1 dm 61.02 0.03531 0.00131 1000 1 0.001
3 -6
1m 61023 3531 130.7 10 1000 1
Masa
dram oz lb g kg mg
-6
1 dram 1 0.0625 0.003906 1.772 0.00177 1.77x10
-5
1 oz 16 1 0.0625 28.35 0.02835 2.83x10
-4
1 lb 256 16 1 453.6 0.4536 4.54x10
-6
1g 0.5644 0.03527 0.002205 1 0.001 10
1 kg 564.4 35.27 2.205 1000 1 0.001
3 -6
1 mg 564.4x10 35270 2205 10 1000 1
Trabajo energía
pie.lbf Kgf-m j kw.h kcal Btu
-9 -6 -3
1 pie.lbf 1 0.1383 1.356 376.8x10 324x10 1.286x10
-6 -3 -3
1 kgf-m 7.233 1 9.807 2.725x10 2.344x10 9.301x10
-9 -6 -6
1j 0.7376 0.102 1 277.8x10 239x10 948.4x10
6 3 6
1 kw.h 2.655x10 367.1x10 3.6x10 1 860 3413
3 -3
1 kcal 3.087x10 426.9 4187 1.163x10 1 1.968
-6
1 btu 778.6 107.6 1055 239x10 0.252 1
Potencia
hp kgf-m/s w Kw Kcal/s Btu
1 hp 1 76,04 745.7 0.7457 0.1782 0.7073
-3 6 -3 -3 -3
1 kgf-m/s 13.15x10 3.6x10 9.807 9.807x10 2.344x10 9.296x10
-3 3 -6 -6
1w 1.341x10 0,102 1 10 239x10 948.4x10
1 kw 1,341 102 1000 1 0.239 0.9484
1 kcal/s 5.614 426.9 4187 4.187 1 3.968
1 btu 1.415 107.6 1055 1.055 0.252 1

2. Equivalencias de peso y volumen de agua
Galón imperial
3 3 3
Unidad Galón(us) In ft m I lb
Galón (us) 1 0.833 231 0.1337 0.00378 3.785 8.33
Galón imperial 1.2 1 277.41 0.1605 0.00455 4.546 10
3
In 0.004329 0.003607 1 0.00057 0.000016 - 0.0361
3
ft 7.48 6.232 1,728.00 1 0.0283 28.317 62.425
3
m 284.17 220.05 - 35.314 1 1,000 2,204.50
I 0.26417 0.22 61.023 0.0353 0.001 1 2.205
lb 0.12 0.1 27.68 0.016 - 0.454 1
UNIDADES DE CAUDAL DE AGUA
GALONES MILLONES DE
UNIDAD US IMPERIALES/ US GALONES/ 3 3
Pie /s m /h Litros/s Barriles/m Barriles/día
GALONES/MIN MIN Día in
US GALONES/MIN 1 0.8327 0.00144 0.00223 0.02271 0.0631 0.0238 34.286
GALONES IMPERIALES/min 1,201 1 0.00173 0.002676 0.2727 0.0758 0.02859 41.176
MILLONES DE US GALONES/DÍA 694.4 578.25 1 1.547 157.7 43.8 16.53 23,810
3
Pie /s 448.83 373.7 0.646 1 101.9 28.32 10.686 15,388
3
m /s 15,850 13,199 22.83 35.315 3,600 1,000 377.4 543,447
3
m /min 264.2 220 0.3804 0.5883 60 16.667 6.29 9,058
3
m /h 4.403 3.67 0.00634 0.00982 1 0.2778 0.1048 151
Litros/s 15.85 13.2 0.0228 0.0353 3.6 1 0.3773 543.3
Litros/min 0.2642 0.22 0.00038 0.000589 0.06 0.0167 0.00629 9.055
Barriles/min 42 34.97 0.0605 0.09357 9.5256 2.65 1 1,440
Barriles/día 0.0292 0.0243 0.000042 0.000065 0.00662 0.00184 0.00069 1
Equivalencias de presión y carga de agua
Unidad lbf/plg2 lbf/pie2 Atmósfera Kgf/cm2 plg de agua pies de agua plg Bares
lbf/plg2 1 144 0.068046 0.070307 27.7276 2.3106 2.036 0.06895
lbf/pie2 0.006945 1 0.000473 0.000488 0.1926 0.01605 0.0141139 0.000479
Atmósfera 14.696 2,116.22 1 1.0332 407.484 33.957 29.921 1.01325
kgf/cm2 14.2233 2,048.16 0.96784 1 394.27 32.864 28.959 0.9807
In de agua 0.03607 5.184 0.002454 0.00254 1 0.08333 0.0734 0.00249
ft de agua 0.43278 62.3205 0.029449 0.03043 12 1 0.8811 0.02964
in de hg 0.49115 70.726 0.033421 0.03453 13.617 1.1349 1 0.03386
mm de hg. 0.019337 2.7845 0.0013158 0.0013595 0.0.5361 0.04468 0.03937 0.001333
Bares 14.5036 2,068.55 0.98692 1.0197 402.1 33.51 29.53 1
Equivalencias de energía
Caloría Joule Termia lb-ft hp h Btu Kwh tep tec cvh erg
1 cal 1 4.1868 1x10-6 3.088 1.5596x10-6 3.9683x10-3 1.163x10-6 100x10-12 142.86x10-12 9.8708x10-5 1061.0338
1J 0.2388 1 238.8x10-9 0.7376 372.5x10-9 947.78x10-6 277.78x10-9 23.88 10-12 34.114x10-12 0.00289 1x107
1 Termia 1x106 4.1868x106 1 3.088x10-6 1.5596 3,968.30 1.163 100x10-6 142.86x10-6 1.58 841.7094
1 lb-ft 0.3238 1.3558 323.8x10-9 1 505.05x10-3 1.2851x10-3 376.62x10-12 32.38x10-8 46.257x10-12 0.00391 8.7584x106
1 hp h 64.1190x104 2.6845x106 0.64119 1.98x106 1 2,544.30 0.7457 6.4119x10-15 9.1599x10-15 1.0834 1.8544x104
1 Btu 251.99 1,055.10 251.9x10-6 778.1 393x10-6 1 293.07x10-6 25.199x10-9 35.986x10-9 0.3984 5.5577x1010
1 Kwh 859.85x103 3.6x106 0.8599 2.656x106 1.341 3,412.10 1 85.985x10-6 122.84x10-9 1.3587 1.6302x106
1 tep 10x109 41.868 109 10x103 30.88x109 15.596 39.683x106 11,630 1 1.42857 1.7888x1012 7.3645x108
1 tec 7x109 29.307x109 7,000 21.616x109 10,917 27.778x106 8,141 0.7 1 5059.8561 5.5249x1016
1 cvh 6.326x105 2.650x106 0.6329 255.4345 0.9253 2.51 0.736 8.7606x10-13 2.1714x10-11 1 4.0642x104
1 erg 2.389x10-8 1x10-7 5.3863x10-4 7.3757x10-8 2.6719x10-10 9.480x10-11 2.778x10-14 2.5296x10-22 6.2698x10-21 2.8900x10-10 1

3. Conversiones de mayor uso en la industria del gas
Volumen Equivalencias energéticas
1 m3 = 6.28981041 barriles 1 millón de toneladas de petróleo = 40.4 Btu (1012 unidades térmicas)
1 Mm3 = 6,289,800.0 barriles 1 tonelada de petróleo crudo equivalente = 41.868 GJ
1 Mpies3 = 178,107.0 barriles 1 millón de toneladas de petróleo crudo eq. = 41.868 PJ
1 tonelada métrica = 7.33 barriles de petróleo
1 barril de combustóleo = 6,783 pies3 de gas natural
1 barril de petróleo = 5,000 pies3 de gas natural
1 m3 gas natural = 8,460 kilocalorías (para fact. De gas seco)
1 Mm3 de gas natural = 900 toneladas de petróleo crudo
1 Mpies3 de gas natural = 26 toneladas de petróleo crudo
1 Mcal = 3.67910 Mpies3 de gas
Equivalencias caloríficas
1 pie3 = 1.03 MBtu de gas natural
1,000 pies3 = 1.03 MMBtu de gas natural
1 Btu = 1,055.056 J
1 Btu = 0.252 Kcal
1 cal = 4.1868 J
1 kcal = 3.968254 Btu
1 Mcal = 3,968.254 Btu
1 PJ = 947.08 barriles de petróleo crudo equivalente
1 Wh = 3,600 J
1 GJ = 239,000 kcal
TABLA DE EQUIVALENCIAS DE PESO Y MEDIDAS DE GAS
LICUADO DE PETRÓLEO (BUTANO-PROPANO) PROPIEDADES DE LOS DISTINTOS GRADOS COMERCIALES DEL GAS LP
PROPANO PROPANO BUTANO
1 litro = 0.5396 kg BUTANO
1 litro = 9.672 pies3 Peso específico del 0.509 0.552 0.576
líquido (agua=1)
1 litro = 6,364 kcal Peso de un litro líquido 0.509 0.552 0.576
1 litro = 25, 254 Btu en kg.
1 litro = 0.264 galones Peso específico del gas 1.521 1.8 1.95
(aire=1)
1 galón = 3.7854 litros Litros de gas / kg del 530.15 447.73 418.39
1 galón = 2.12 litros líquido
Litro de gas / litro de 269.3 246.3 242
1 kg = 0.472 galones líquido
1 kg = 0.4889 m3 Cal/m3 22.691.00 26.695.00 28,221.00
1 kg = 17.166 pies3 Cal/kg 12,030.00 11,967.00 11,948.00
Cal/l 6,112.00 6,644.00 6,818.00
1 kg = 11,365 kcal m3de aire para quemar 23.92 31.1 31.1
1 kg = 45,099 Btu c/ m3de gas
1 kg = 1.785 litros
Tabla de equivalencias de pesos y medidas de gas natural
1 m3 = 35.3165 pies3
1 m3 = 2.0454 kg/gas 1 ft
3
Aprox. 1,000 Btu
1 m3 = 23,246 kcal 3
1 cp = 100 ft
3
1 m3 = 92,247 Btu 3
100 ft = 1 Therm
1 pie3 = 0.053 kg 1 Therm = 100,000 Btu
3
1 pie3 = 0.0919 litros 1 Therm = 100 ft
3
1 pie3 = 658 kcal 1 Therm = 0.1 Mft
3
1 pie3 10 Therms = Mft