Compressibility of Gases, Volumetric
Gauge Pressure Standard Cubic Feet (scf) of gas or Cubic Meter (M3) of gas compressed into one cubic foot or one cubic meter of liquid volume at the given pressure and a temperature of 70F (21'C)
Theoretical for Ideal Gas Actual for Real Gases
AirArgonHeliumHydrogenNitrogenOxygenNatural Gas
psig bar scf m3 scf m3 scf m3 scf m3 scf m3 scf m3 scf m3 scf m3
1000 69.00 69.03 1.95 70.29 1.99 71.79 2.03 66.37 1.88 66.26 1.88 69.30 1.96 71.83 2.03 80.01 2.27
1100 75.90 75.83 2.15 77.21 2.19 79.10 2.24 72.64 2.06 72.50 2.05 76.08 2.15 79.15 2.24 89.24 2.53
1200 82.80 82.63 2.34 84.14 2.38 86.44 2.45 78.86 2.23 78.66 2.23 82.82 2.35 86.52 2.45 98.40 2.79
1300 89.70 85.30 2.53 91.07 2.58 93.79 2.66 85.03 3.05 84.73 2.40 89.49 2.53 93.89 2.66 107.78 3.05
1400 96.60 96.24 2.73 98.00 2.78 101.20 2.87 91.16 2.58 90.83 2.57 96.14 2.72 101.27 2.87 117.89 3.34
1500 103.40 103.04 2.92 104.77 2.97 108.50 3.07 98.12 2.78 96.84 2.74 102.74 2.91 108.66 3.08 127.24 3.60
1600 110.30 109.84 3.11 111.37 3.15 115.90 3.28 104.28 2.95 102.83 2.91 109.29 3.10 116.09 3.29 137.34 3.89
1700 117.20 116.65 3.30 117.97 3.34 123.30 3.49 110.40 3.13 108.75 3.08 115.78 3.28 123.50 3.50 147.13 4.17
1800 124.10 123.45 3.50 124.57 3.53 130.70 3.70 116.49 3.30 114.66 3.25 122.25 3.46 130.88 3.71 156.31 4.43
1900 131.00 130.25 3.69 131.17 3.71 138.00 3.91 122.54 3.47 120.49 3.41 128.66 3.64 138.27 3.92 166.61 4.72
2000 137.90 137.05 3.88 137.77 3.90 145.30 4.11 128.55 3.64 126.28 3.58 134.90 3.82 145.68 4.13 175.76 4.98
2100 144.80 143.86 4.07 144.36 4.09 152.60 4.32 134.53 3.81 132.05 3.74 140.91 3.90 153.04 4.33 185.67 5.26
2200 151.70 150.66 4.27 150.91 4.27 159.90 4.53 140.47 3.98 137.71 3.90 147.33 4.10 160.34 4.54 194.45 5.51
2300 158.60 157.46 4.46 156.97 4.45 167.10 4.73 146.37 4.15 143.37 4.06 153.46 4.30 167.64; 4.75 203.23 5.76
2400 165.50 164.27 4.65 163.04 4.62 174.30 4.94 152.25 4.31 148.97 4.22 159.48 4.52 174.92 4.95 213.39 6.04
2500 172.40 171.07 4.84 169.11 4.79 181.50 5.14 158.08 4.48 154.48 4.37 165.39 4.68 182.04 5.16 221.36 6.27
2600 179.30 177.87 5.04 175.17 4.96 188.60 5.34 163.89 4.64 159.96 4.53 171.24 4.80 189.18 5.36 229.57 6.50
2700 186.20 184.67 5.23 181.24 5.13 195.60 5.54 169.66 4.80 165.43 4.69 177.04 5.00 196.27 5.56 236.82 6.71
2800 193.10 191.48 5.42 187.30 5.30 202.50 5.73 179.40 5.08 170.84 4.84 182.69 5.17 203.26 5.76 244.92 6.94
2900 200.00 198.28 5.62 193.37 5.48 209.40 5.93 181.10 5.13 176.20 4.99 188.32 5.33 210.24 5.95 252.33 7.15
3000 206.90 205.08 5.81 198.96 5.63 216.30 6.13 186.78 5.29 181.49 5.14 193.82 5.49 217.09 6.15 259.67 7.35
3100 213.80 211.88 6.00 204.40 5.79 223.00 6.32 192.42 5.45 186.85 5.29 199.14 5.64 223.86 6.34 265.59 7.52
3200 220.70 218.69 6.19 209.83 5.94 229.70 6.51 198.03 5.61 192.07 5.44 204.61 5.79 230.56 6.53 271.73 7.70
3300 227.60 225.49 6.39 215.27 6.10 236.30 6.69 203.60 5.77 197.31 5.59 209.86 5.94 237.18 6.72 278.46 7.89
3400 234.50 232.29 6.58 220.70 6.25 242.80 6.88 209.15 5.92 202.50 5.73 215.05 6.09 243.65 6.90 284.75 8.06
3500 241.40 239.10 6.77 226.14 6.40 249.20 7.06 214.66 6.08 207.64 5.88 220.26 6.24 250.10 7.08 290.24 8.22
3600 248.30 245.90 6.96 231.58 6.56 255.50 7.24 220.15 6.23 212.46 6.02 225.18 6.38 256.41 7.26 296.34 8.39
3700 255.20 252.70 7.16 236.87 6.71 261.80 7.41 225.60 6.39 217.70 6.17 230.10 6.52 262.63 7.44 300.92 8.52
3800 262.10 259.50 7.35 241.69 6.84 267.90 7.59 231.03 6.54 222.69 6.31 234.91 6.65 268.69 7.61 306.46 8.68
3900 269.00 266.31 7.54 246.51 6.98 274.00 7.76 236.42 6.70 227.71 6.45 239.70 6.79 274.74 7.78 311.92 8.83
4000 275.90 273.11 7.73 251.34 7.12 279.90 7.93 241.79 6.85 232.63 6.59 244.39 6.92 280.66 7.95 316.55 8.96
4100 282.80 279.91 7.93 256.16 7.25 285.80 8.09 247.13 7.00 237.50 6.73 249.01 7.05 286.35 8.11 321.82 9.11
4200 289.70 286.71 8.12 260.98 7.39 291.60 8.26 252.44 7.15 242.34 6.86 253.51 7.18 292.12 8.27 325.90 9.23
4300 296.60 293.52 8.31 265.81 7.53 297.30 8.42 257.52 7.29 247.13 7.00 257.92 7.30 297.68 8.43 329.88 9.34
4400 303.40 300.32 8.51 270.51 7.66 302.80 8.58 262.97 7.45 251.84 7.13 262.38 7.43 303.20 8.59 334.52 9.47
4500 310.30 307.12 8.70 274.85 7.78 308.30 8.73 268.19 7.60 256.60 7.27 266.60 7.55 308.67 8.74 338.33 9.58
4600 317.20 313.93 8.89 279.20 7.91 313.70 8.88 273.39 7.74 261.28 7.40 266.60 7.67 314.08 8.89 342.43 9.70
4700 324.10 320.73 9.08 283.54 8.03 319.10 9.04 278.55 7.89 265.94 7.53 275.07 7.79 319.36 9.04 345.00 9.79
4800 331.00 327.53 9.28 287.89 8.15 324.30 9.18 283.70 8.03 270.53 7.66 279.11 7.90 324.10 9.18 350.00 9.92
4900 337.90 334.33 9.47 292.23 8.28 329.40 9.33 288.81 8.18 275.08 7.79 282.97 8.00 328.96 9.32 353.14 10.00
5000 344.80 341.14 9.66 296.57 8.40 334.40 9.47 293.90 8.32 279.62 7.92 286.67 8.12 333.83 9.45 356.93 10.11
5100 351.70 347.94 9.85 300.92 8.52 339.40 9.61 298.96 8.47 284.17 8.05 290.43 8.23 338.69 9.59 361.78 10.25
5200 358.60 354.74 10.05 304.84 8.63 344.30 9.75 304.00 8.61 288.64 8.17 294.39 8.34 343.56 9.73 364.71 10.33
5300 365.50 361.54 10.24 308.57 8.74 349.00 9.88 309.01 8.75 293.03 8.30 298.18 8.44 348.42 9.87 367.15 10.40
5400 372.40 368.35 10.43 312.30 8.84 353.70 10.02 313.99 8.89 297.41 8.42 301.92 8.55 353.29 10.01 370.30 10.49
5500 379.30 375.15 10.62 316.03 8.95 358.40 10.15 318.95 9.03 301.83 8.55 305.80 8.66 358.15 10.14 373.38 10.57
5600 386.20 381.95 10.82 319.77 9.06 362.90 10.28 323.88 9.17 306.17 8.67 309.65 8.77 363.02 10.28 374.56 10.61
5700 393.10 388.76 11.01 323.50 9.16 367.40 10.40 328.80 9.31 309.15 8.76 313.26 8.87 367.88 10.42 377.53 10.69
5800 400.00 395.56 11.20 327.23 9.27 371.70 10.53 333.68 9.45 313.63 8.88 316.50 8.96 372.75 10.56 380.45 10.77
5900 406.90 402.36 11.40 330.80 9.37 376.00 10.65 338.54 9.59 317.95 9.00 319.76 9.06 377.22 10.68 382.58 10.83
6000 413.80 409.16 11.59 334.06 9.46 380.30 10.77 343.37 9.72 321.96 9.12 322.77 9.14 380.96 10.79 386.11 10.93

Table is based on absolute pressure (psia) = gage pressure (psig) + 14.7.
One atmosphere = 14.7 psia.

Last Update: 9/3/96

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