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# Helium - Density and Specific Weight vs. Temperature and Pressure

## Online calculator, figures and tables showing density and specific weight of helium, He, at varying temperature and pressure - Imperial and SI Units.

Density, ρ, has units typically [kg/m3] or [lb/ft3], and is defined by the ratio of the mass to the volume of a substance:

ρ = m/V                      [1]

where     m = mass, units typically [kg] or [lb]
V = volume, units typically [m3] or [ft3]

Specific weight, γ, has units typically [N/m3] or [lbf/ft3]  is defined by the ratio of the weight to the volume of a substance:

γ = (m * g)/V = ρ * g                [2]

where    g = acceleration due to gravity, units typically [m/s2] and value on Earth usually given as 9.80665 [m/s2] or 32.17405 [ft/s2]

Tabulated values of helium density at given temperature and pressure (SI and Imperial units) as well as density units conversion are given below the figures.

Helium phase diagram

### Online Helium Density Calculator

The calculator below can be used to estimate the density and specific weight of helium at given temperature and pressure.
The output density is given as kg/m3, lb/ft3, lb/gal(US liq) and sl/ft3.  Specific weight is given as N/m3 and lbf/ ft3.

Temperature

Choose the actual unit of temperature: °C  °F  °R
Choose the actual pressure:  1 bara / 14.5 psia; 10 bara / 145 psia; 50 bara / 725 psia;

See also Helium Thermophysical properties at standard conditionsas well as density and specific weight of acetone, air, ammonia, argon, benzene, butanecarbon dioxide, carbon monoxide, ethane, ethanol, ethylene, hydrogen, methane, methanol, nitrogen, oxygen, pentane, propane, toluene and water.
Density of crude oil, Density of fuel oils, Density of lubricating oil and Density of jet fuel as function of temperature.

Density and specific weight of helium gas at varying temperature and atmospheric pressure, SI and Imperial units:

Density of helium at varying temperature and pressure, SI and Imperial units:

Density of helium at varying temperature and equilibrium pressure, SI and Imperial units:

Density and specific weight of helium at given temperatures and pressures:

For full table with Density and Specific Weight - rotate the screen!

 State Temperature Pressure Density Specific weight [K] [°C] [°F] [bara] [psia] [mol/dm3] [g/l],[kg/m3] [lb/ft3] [sl/ft3] [N/m3] [lbf/ft3] Liquid at equilibrium 2.177 -270.97 -455.75 0.0486 0.704 36.53 146.2 9.127 0.2837 1434 9.127 2.5 -271 -455 0.100 1.45 36.23 145.0 9.052 0.2813 1422 9.052 3 -270 -454 0.237 3.44 35.30 141.3 8.821 0.2742 1386 8.821 3.5 -270 -453 0.466 6.76 34.00 136.1 8.496 0.2641 1335 8.496 4 -269 -452 0.810 11.7 32.20 128.9 8.047 0.2501 1264 8.047 4.5 -269 -452 1.29 18.7 29.68 118.8 7.416 0.2305 1165 7.416 5 -268 -451 1.95 28.2 25.18 100.8 6.293 0.1956 988.5 6.293 5.195 -267.96 -450.32 2.275 33.0 21.39 69.64 4.347 0.1351 682.9 4.347 Gas at equilibrium 2.177 -270.97 -455.75 0.0486 0.704 0.2863 1.146 0.072 0.00222 11.24 0.07154 2.5 -271 -455 0.100 1.45 0.5287 2.116 0.1321 0.00411 20.75 0.1321 3 -270 -454 0.237 3.44 1.106 4.428 0.2764 0.00859 43.42 0.2764 3.5 -270 -453 0.466 6.76 2.004 8.022 0.5008 0.01557 78.67 0.5008 4 -269 -452 0.810 11.7 3.350 13.41 0.8372 0.02602 131.5 0.8372 4.5 -269 -452 1.29 18.7 5.436 21.76 1.358 0.04222 213.4 1.358 5 -268 -451 1.95 28.2 9.546 38.21 2.385 0.07414 374.7 2.385 5.195 -267.96 -450.32 2.28 33.0 17.40 69.64 4.347 0.1351 682.9 4.347 Gas 20 -253 -424 1 14.5 0.60 2.408 0.1503 0.00467 23.61 0.1503 40 -233 -388 1 14.5 0.30 1.200 0.07491 0.00233 11.77 0.07491 60 -213 -352 1 14.5 0.2000 0.8006 0.04998 0.00155 7.851 0.04998 80 -193 -316 1 14.5 0.1501 0.6007 0.03750 0.00117 5.891 0.03750 100 -173 -280 1 14.5 0.1201 0.4807 0.03001 9.33E-04 4.714 0.03001 120 -153 -244 1 14.5 0.10011 0.4007 0.02501 7.77E-04 3.930 0.02501 140 -133 -208 1 14.5 0.08582 0.3435 0.02144 6.67E-04 3.369 0.02144 160 -113 -172 1 14.5 0.07510 0.3006 0.01877 5.83E-04 2.948 0.01877 180 -93.2 -136 1 14.5 0.06676 0.2672 0.01668 5.18E-04 2.620 0.01668 200 -73.2 -100 1 14.5 0.06009 0.2405 0.01501 4.67E-04 2.358 0.01501 220 -53.2 -63.7 1 14.5 0.05464 0.2187 0.01365 4.24E-04 2.145 0.01365 240 -33.2 -27.7 1 14.5 0.05009 0.2005 0.01252 3.89E-04 1.966 0.01252 260 -13.2 8.3 1 14.5 0.04624 0.1851 0.01156 3.59E-04 1.815 0.01156 280 6.9 44.3 1 14.5 0.04292 0.1718 0.01073 3.33E-04 1.685 0.01073 300 26.9 80.3 1 14.5 0.04007 0.1604 0.01001 3.11E-04 1.573 0.01001 320 46.9 116 1 14.5 0.03758 0.1504 0.00939 2.92E-04 1.475 0.00939 340 66.9 152 1 14.5 0.03535 0.1415 0.00883 2.75E-04 1.388 0.00883 360 86.9 188 1 14.5 0.03340 0.1337 0.00835 2.59E-04 1.311 0.00835 400 127 260 1 14.5 0.03006 0.1203 0.00751 2.33E-04 1.180 0.00751 500 227 440 1 14.5 0.02405 0.09626 0.00601 1.87E-04 0.9440 0.00601 600 327 620 1 14.5 0.02004 0.08022 0.00501 1.56E-04 0.7867 0.00501 700 427 800 1 14.5 0.01718 0.06876 0.00429 1.33E-04 0.6743 0.00429 800 527 980 1 14.5 0.01503 0.06017 0.00376 1.17E-04 0.5901 0.00376 900 627 1160 1 14.5 0.01336 0.05348 0.00334 1.04E-04 0.5245 0.00334 1000 727 1340 0.01203 0.04814 0.00301 9.34E-05 0.4721 0.00301 Supercritical phase 20 -253 -424 10 145 6.00 24.02 1.500 0.04661 235.6 1.500 40 -233 -388 10 145 2.93 11.72 0.7317 0.02274 114.9 0.7317 60 -213 -352 10 145 1.96 7.850 0.4901 0.01523 76.98 0.4901 80 -193 -316 10 145 1.477 5.912 0.3691 0.01147 57.98 0.3691 100 -173 -280 10 145 1.185 4.745 0.2962 0.00921 46.53 0.2962 120 -153 -244 10 145 0.9901 3.963 0.2474 0.00769 38.86 0.2474 140 -133 -208 10 145 0.8502 3.403 0.2124 0.00660 33.37 0.2124 160 -113 -172 10 145 0.7450 2.982 0.1862 0.00579 29.24 0.1862 180 -93.2 -136 10 145 0.6628 2.653 0.1656 0.00515 26.02 0.1656 200 -73.2 -100 10 145 0.5971 2.390 0.1492 0.00464 23.44 0.1492 220 -53.2 -63.7 10 145 0.5431 2.174 0.1357 0.00422 21.32 0.1357 240 -33.2 -27.7 10 145 0.4982 1.994 0.1245 0.00387 19.55 0.1245 260 -13.2 8.3 10 145 0.4602 1.842 0.1150 0.00357 18.06 0.1150 280 6.9 44.3 10 145 0.4275 1.711 0.1068 0.00332 16.78 0.1068 300 26.9 80.3 10 145 0.3990 1.597 0.09970 0.00310 15.66 0.09970 320 46.9 116 10 145 0.3743 1.498 0.09352 0.00291 14.69 0.09352 340 66.9 152 10 145 0.3523 1.410 0.08802 0.00274 13.83 0.08802 360 86.9 188 10 145 0.3328 1.332 0.08315 0.00258 13.06 0.08315 400 127 260 10 145 0.2998 1.200 0.07491 0.00233 11.77 0.07491 500 227 440 10 145 0.2399 0.9604 0.05996 0.00186 9.42 0.05996 600 327 620 10 145 0.2000 0.8007 0.04999 0.00155 7.85 0.04999 700 427 800 10 145 0.1715 0.6866 0.04286 0.00133 6.73 0.04286 800 527 980 10 145 0.1501 0.6009 0.03751 0.00117 5.89 0.03751 900 627 1160 10 145 0.1335 0.5342 0.03335 0.00104 5.24 0.03335 1000 727 1340 10 145 0.1201 0.4809 0.03002 0.00093 4.72 0.03002 Supercritical phase 100 -173 -280 50 725 5.606 22.44 1.401 0.04354 220.0 1.401 350 76.9 170 50 725 1.658 6.636 0.4143 0.01288 65.08 0.4143 600 327 620 50 725 0.9920 3.971 0.2479 0.00770 38.94 0.2479 850 577 1070 50 725 0.7027 2.812 0.1756 0.00546 27.58 0.1756 1100 827 1520 50 725 0.5439 2.177 0.1359 0.00422 21.35 0.1359 1350 1077 1970 50 725 0.4437 1.776 0.1109 0.00345 17.42 0.1109 Supercritical phase 20 -253 -424 100 1450 36.78 147 9.189 0.2856 1444 9.189 40 -233 -388 100 1450 22.82 91 5.702 0.1772 895.6 5.702 60 -213 -352 100 1450 16.33 65 4.080 0.1268 641.0 4.080 80 -193 -316 100 1450 12.76 51 3.189 0.09913 501.0 3.189 100 -173 -280 100 1450 10.51 42.1 2.625 0.08159 412.4 2.625 120 -153 -244 100 1450 8.94 35.8 2.233 0.06941 350.8 2.233 140 -133 -208 100 1450 7.780 31.1 1.944 0.06042 305.4 1.944 160 -113 -172 100 1450 6.891 27.6 1.722 0.05351 270.5 1.722 180 -93.2 -136 100 1450 6.183 24.8 1.545 0.04802 242.7 1.545 200 -73.2 -100 100 1450 5.611 22.5 1.402 0.04358 220.3 1.402 220 -53.2 -63.7 100 1450 5.134 20.6 1.283 0.03987 201.5 1.283 240 -33.2 -27.7 100 1450 4.732 18.9 1.182 0.03675 185.7 1.182 260 -13.2 8.3 100 1450 4.390 17.6 1.097 0.03409 172.3 1.097 280 6.9 44.3 100 1450 4.092 16.4 1.023 0.03178 160.6 1.023 300 26.9 80.3 100 1450 3.833 15.3 0.9576 0.02976 150.4 0.9576 320 46.9 116 100 1450 3.605 14.4 0.9008 0.02800 141.5 0.9008 340 66.9 152 100 1450 3.403 13.62 0.8503 0.02643 133.6 0.8503 360 86.9 188 100 1450 3.220 12.89 0.8047 0.02501 126.4 0.8047 400 127 260 100 1450 2.911 11.65 0.7273 0.02260 114.2 0.7273 500 227 440 100 1450 2.345 9.39 0.5860 0.01821 92.06 0.5860 600 327 620 100 1450 1.964 7.86 0.4907 0.01525 77.08 0.4907 700 427 800 100 1450 1.689 6.76 0.4220 0.01312 66.29 0.4220 800 527 980 100 1450 1.482 5.93 0.3702 0.01151 58.15 0.3702 900 627 1160 100 1450 1.319 5.28 0.3297 0.01025 51.79 0.3297 1000 727 1340 100 1450 1.189 4.76 0.2972 0.00924 46.68 0.2972 Supercritical phase 100 -173 -280 500 7250 35.38 141.6 8.842 0.2748 1389 8.842 350 76.9 170 500 7250 14.39 57.6 3.595 0.1117 564.7 3.595 600 327 620 500 7250 9.06 36.3 2.264 0.07036 355.6 2.264 850 577 1070 500 7250 6.60 26.4 1.650 0.05130 259.3 1.650 1100 827 1520 500 7250 5.19 20.8 1.298 0.04033 203.8 1.298 1350 1077 1970 500 7250 4.28 17.1 1.069 0.03322 167.9 1.069

Density units conversion:

Density converter

kilogram/cubic meter [kg/m3] = gram/liter [g/l], kilogram/liter [kg/l] = gram/cubic centimeter [g/cm3]= ton(metric)/cubic meter [t/m3], once/gallon(US liquid) [oz/gal(US liq)] pound/cubic inch [lb/in3], pound/cubic foot [lb/ft3], pound/gallon(UK) [lb/gal(UK)], pound/gallon(US liquid) [lb/gal(US liq)], slug/cubic foot [sl/ft3], ton(short)/cubic yard [ton(short)/yd3], ton(long)/cubic yard [yd3]

• 1 g/cm3 = 1 kg/l = 1000 kg/m3 = 62.428 lb/ft3 = 0.03613 lb/in3 = 1.9403 sl/ft3 = 10.0224 lb/gal(UK) = 8.3454 lb/gal(US liq) = 0.5780 oz/in= 0.7525 ton(long)/yr3
• 1 g/l = 1 kg/m3 = 0.001 kg/l = 0.000001 kg/cm3 = 0.001 g/cm3 = 0.99885 oz/ft3  = 0.0005780 oz/in3 = 0.16036 oz/gal(UK) = 0.1335 oz/gal(US liq) = 0.06243 lb/ft3 = 3.6127x10-5 lb/in3 = 1.6856 lb/yd3 = 0.010022 lb/gal(UK) = 0.0083454 lb/gal(US liq) = 0.0007525 ton(long)/yd= 0.0008428 ton(short)/yd3
• 1 kg/l = 1 g/cm3 = 1000 kg/m3 = 62.428 lb/ft3 = 0.03613 lb/in3 = 1.9403 sl/ft3 = 8.3454 lb/gal(US liq) = 0.5780 oz/in= 0.7525 ton(long)/yr3
• 1 kg/m3 = 1 g/l = 0.001 kg/l = 0.000001 kg/cm3 = 0.001 g/cm3 = 0.99885 oz/ft3  = 0.0005780 oz/in3 = 0.16036 oz/gal(UK) = 0.1335 oz/gal(US liq) = 0.06243 lb/ft3 = 3.6127x10-5 lb/in3 = 1.6856 lb/yd3 = 0.010022 lb/gal(UK) = 0.008345 lb/gal(US liq) = 0.0007525 ton(long)/yd = 0.0008428 ton(short)/yd
• 1 lb/ft3 = 27 lb/yd3 = 0.009259 oz/in= 0.0005787 lb/in= 16.01845 kg/m3 = 0.01602 g/cm3  = 0.1605 lb/gal(UK) = 0.1349 lb/gal(US liq) = 2.5687 oz/gal(UK) = 2.1389 oz/gal(US liq) = 0.01205 ton(long)/yd3 = 0.0135 ton(short)/yd3
• 1 lb/gal(UK) = 0.8327 lb/gal(US liq) = 16 oz/gal(UK) = 13.323 oz/gal(US liq) = 168.179 lb/yd3 = 6.2288 lb/ft3 = 0.003605 lb/in3 = 0.05767 oz/in = 99.7764 kg/m3 = 0.09977 g/cm3  = 0.07508 ton(long)/yd3 = 0.08409 ton(short)/yd3
• 1 lb/gal(US liq) = 1.2009 lb/gal(UK) = 19.215 oz/gal(UK) = 16 oz/gal(US liq) = 201.97 lb/yd3 = 7.4805 lb/ft3 = 0.004329 lb/in3 = 0.06926 oz/in = 119.826 kg/m3 = 0.1198 g/cm3  = 0.09017 ton(long)/yd3 = 0.1010 ton(short)/yd3
• 1 lb/in3 = 1728 lb/ft3 = 46656 lb/yd3 = 16 oz/in= 27680 kg/m3 = 27.680 g/cm3  = 277.419 lb/gal(UK) = 231 lb/gal(US liq) =4438.7 oz/gal(UK) = 3696 oz/gal(US liq) = 20.8286 ton(long)/yd3 = 23.3280 ton(short)/yd3
• 1 oz/gal(UK) =  0.8327 oz/gal(US liq) = 6.2360 kg/m3 = 6.2288 oz/ft3 = 0.3893 lb/ft3 = 10.5112 lb/yd3
• 1 oz/gal(US liq) = 1.2009 oz/gal(UK) = 7.4892 kg/m3 = 7.4805 oz/ft3 = 0.4675 lb/ft3 = 12.6234 lb/yd3
• 1 sl/ft3 = 515.3788 kg/m3 = 514.7848 oz/ft3 = 0.2979 oz/in3 = 32.1741 lb/ft3 = 82.645 oz/gal(UK) = 68.817 oz/gal(US liq)
• 1 ton(long)/yd3 = 1.12 ton(short)/yd3 = 1328.94 kg/m3 = 0.7682 oz/in3 = 82.963 lb/ft3 = 2240 lb/yd3 = 2.5786 sl/ft3 = 13.319 lb/gal(UK) = 11.0905 lb/gal(US liq)
• 1 ton(short)/yd3 = 0.8929 ton(long)/yd3 = 1186.55 kg/m3 = 0.6859 oz/in3 = 74.074 lb/ft3 = 2000 lb/yd3 = 2.3023 sl/ft3 = 11.8921 lb/gal(UK) = 9.9023 lb/gal(US liq)

## Related Topics

• Fluid Mechanics - The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
• Material Properties - Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.
• Thermodynamics - Work, heat and energy systems.
• Densities - Densities of solids, liquids and gases. Definitions and convertion calculators.

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## Unit Converters

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