Hydrogen - Density And Specific Weight Vs. Temperature And Pressure
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 hydrogen density at given temperature and pressure (SI and Imperial units) as well as density units conversion are given below the figures.
Online Hydrogen Density Calculator
The calculator below can be used to estimate the density and specific weight of gaseous hydrogen at given temperature and atmospheric pressure (1 bara/14.5psia). 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.
For calculation of density at higher pressure (up to 100 bara / 1450 psia), a good approximation is to multiply the density at 1 bara with the actual, higher pressure (in bara). If pressure is given in psia, you have to multiply the density at 14.5 psia with the actual higher pressure (in psia) and divide by 14.5.Temperature
Choose the actual unit of temperature: °C °F K °R
Note! For pressure between 20 and 100 bara, the error may be up to 7% by using this approximation (higher error, the higher pressure).
Example 1: Density of hydrogen at 5 bara and 24 °C. Calculator gives the density at 24 °C and 1 bara: 0.0815 [kg/m3 ] Density at 24°C and 5 bara : 0.0815 [kg/m3 ]* 5[bara]/1[bara] = 0.408 [kg/m3 ]
Example 2: Density of hydrogen at 725 psia and 125 °F. Calculator gives the density at 125 °F and 14.5 psia: 0.00465 [lbm /ft3 ] Density at 125°F and 725 psia : 0.00465 [lbm /ft3 ]* 725[psia]/14.5[psia] = 0.233 [lbm /ft3 ] (this is 3% more than the below tabulated value of density at 125°F and 725 psia.)
See also other properties of Hydrogen at varying temperature and pressure: Specific heat (Heat capacity) and Thermal conductivity , and Thermophysical properties at standard conditions , as well as density and specific weight o f acetone , air , ammonia , argon , benzene , butane , carbon dioxide , carbon monoxide , ethane , ethanol , ethylene , helium , 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 hydrogen at given temperatures and pressures:
For full table with Denity and Specific Weight - rotate the screen!
State | Temperature | Pressure | Density | Specific weight | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
[K] | [°C] | [°F] | [MPa] | [bara] | [psia] | [mol/dm3] | [g/l], [kg/m3] | [lbm /ft3] | [sl/ft3 *10-3] | [N/m3] | [lbf /ft3] | |
Liquid at equilibrium pressure | 13.96 | -259.2 | -434.5 | 0.00770 | 0.0770 | 1.12 | 38.15 | 76.91 | 4.801 | 149.2 | 754.2 | 4.801 |
14 | -259 | -434 | 0.00789 | 0.0789 | 1.14 | 38.13 | 76.87 | 4.799 | 149.1 | 753.8 | 4.799 | |
16 | -257 | -431 | 0.0215 | 0.215 | 3.12 | 37.26 | 75.12 | 4.689 | 145.8 | 736.7 | 4.689 | |
18 | -255 | -427 | 0.0481 | 0.481 | 6.97 | 36.32 | 73.22 | 4.571 | 142.1 | 718.1 | 4.571 | |
20 | -253 | -424 | 0.0932 | 0.932 | 13.5 | 35.27 | 71.11 | 4.439 | 138.0 | 697.4 | 4.439 | |
22 | -251 | -420 | 0.163 | 1.63 | 23.7 | 34.09 | 68.73 | 4.291 | 133.4 | 674.0 | 4.291 | |
24 | -249 | -416 | 0.264 | 2.64 | 38.3 | 32.74 | 66.00 | 4.120 | 128.1 | 647.2 | 4.120 | |
26 | -247 | -413 | 0.403 | 4.03 | 58.4 | 31.15 | 62.80 | 3.921 | 121.9 | 615.9 | 3.921 | |
28 | -245 | -409 | 0.585 | 5.85 | 84.9 | 29.23 | 58.92 | 3.678 | 114.3 | 577.8 | 3.678 | |
30 | -243 | -406 | 0.850 | 8.50 | 123 | 26.71 | 53.84 | 3.361 | 104.5 | 528.0 | 3.361 | |
32 | -241 | -402 | 1.12 | 11.2 | 162 | 22.64 | 45.64 | 2.849 | 88.55 | 447.5 | 2.849 | |
33.19 | -240.0 | -399.9 | 1.33 | 13.3 | 193 | 14.94 | 30.12 | 1.880 | 58.44 | 295.4 | 1.880 | |
Gas at equilibrium pressure | 13.96 | -259.2 | -434.5 | 0.00770 | 0.0770 | 1.12 | 0.06754 | 0.1362 | 8.50E-03 | 0.2642 | 1.335 | 8.50E-03 |
14 | -259 | -434 | 0.00789 | 0.0789 | 1.14 | 0.06902 | 0.1391 | 8.69E-03 | 0.2700 | 1.365 | 8.69E-03 | |
16 | -257 | -431 | 0.0215 | 0.215 | 3.12 | 0.1676 | 0.3380 | 0.02110 | 0.6558 | 3.314 | 0.02110 | |
18 | -255 | -427 | 0.0481 | 0.481 | 6.97 | 0.3413 | 0.6880 | 0.04295 | 1.335 | 6.747 | 0.04295 | |
20 | -253 | -424 | 0.0932 | 0.932 | 13.5 | 0.6165 | 1.243 | 0.07759 | 2.412 | 12.19 | 0.07759 | |
22 | -251 | -420 | 0.163 | 1.63 | 23.7 | 1.025 | 2.067 | 0.1290 | 4.010 | 20.27 | 0.1290 | |
24 | -249 | -416 | 0.264 | 2.64 | 38.3 | 1.609 | 3.244 | 0.2025 | 6.294 | 31.81 | 0.2025 | |
26 | -247 | -413 | 0.403 | 4.03 | 58.4 | 2.431 | 4.900 | 0.3059 | 9.508 | 48.06 | 0.3059 | |
28 | -245 | -409 | 0.585 | 5.85 | 84.9 | 3.600 | 7.258 | 0.4531 | 14.08 | 71.18 | 0.4531 | |
30 | -243 | -406 | 0.850 | 8.50 | 123 | 5.364 | 10.81 | 0.6751 | 20.98 | 106.1 | 0.6751 | |
32 | -241 | -402 | 1.12 | 11.2 | 162 | 8.682 | 17.50 | 1.093 | 33.96 | 171.7 | 1.093 | |
33.19 | -240.0 | -399.9 | 1.33 | 13.3 | 193 | 14.94 | 30.12 | 1.880 | 58.44 | 295.4 | 1.880 | |
Liquid | 20 | -253 | -424 | 0.1 | 1 | 14.5 | 35.29 | 71.14 | 4.441 | 138.0 | 698 | 4.44 |
20.23 | -252.9 | -423.3 | 0.1 | 1 | 14.5 | 35.16 | 70.88 | 4.425 | 137.5 | 695 | 4.42 | |
Gas | 20.23 | -252.9 | -423.3 | 0.1 | 1 | 14.5 | 0.6563 | 1.323 | 0.08259 | 2.567 | 13.0 | 0.0826 |
40 | -233 | -388 | 0.1 | 1 | 14.5 | 0.3054 | 0.6157 | 0.03844 | 1.195 | 6.04 | 0.0384 | |
60 | -213 | -352 | 0.1 | 1 | 14.5 | 0.2013 | 0.4059 | 0.02534 | 0.7876 | 3.98 | 0.0253 | |
80 | -193 | -316 | 0.1 | 1 | 14.5 | 0.1505 | 0.3035 | 0.01895 | 0.5889 | 2.98 | 0.0189 | |
100 | -173 | -280 | 0.1 | 1 | 14.5 | 0.1203 | 0.2425 | 0.01514 | 0.4705 | 2.38 | 0.0151 | |
120 | -153 | -244 | 0.1 | 1 | 14.5 | 0.1002 | 0.2020 | 0.01261 | 0.3919 | 1.98 | 0.0126 | |
140 | -133 | -208 | 0.1 | 1 | 14.5 | 0.08586 | 0.1731 | 0.01081 | 0.3359 | 1.70 | 0.0108 | |
160 | -113 | -172 | 0.1 | 1 | 14.5 | 0.07510 | 0.1514 | 0.009452 | 0.2938 | 1.48 | 0.00945 | |
180 | -93.2 | -136 | 0.1 | 1 | 14.5 | 0.06677 | 0.1346 | 0.008403 | 0.2612 | 1.32 | 0.00840 | |
200 | -73.2 | -99.7 | 0.1 | 1 | 14.5 | 0.06007 | 0.1211 | 0.007560 | 0.2350 | 1.19 | 0.00756 | |
220 | -53.2 | -63.7 | 0.1 | 1 | 14.5 | 0.05461 | 0.1101 | 0.006873 | 0.2136 | 1.08 | 0.00687 | |
240 | -33.2 | -27.7 | 0.1 | 1 | 14.5 | 0.05010 | 0.1010 | 0.006305 | 0.1960 | 0.990 | 0.00631 | |
260 | -13.2 | 8.3 | 0.1 | 1 | 14.5 | 0.04623 | 0.09319 | 0.005818 | 0.1808 | 0.914 | 0.00582 | |
280 | 6.9 | 44.3 | 0.1 | 1 | 14.5 | 0.04293 | 0.08654 | 0.005403 | 0.1679 | 0.849 | 0.00540 | |
300 | 26.9 | 80.3 | 0.1 | 1 | 14.5 | 0.04006 | 0.08077 | 0.005042 | 0.1567 | 0.792 | 0.00504 | |
320 | 46.9 | 116 | 0.1 | 1 | 14.5 | 0.03756 | 0.07572 | 0.004727 | 0.1469 | 0.743 | 0.00473 | |
340 | 66.9 | 152 | 0.1 | 1 | 14.5 | 0.03535 | 0.07127 | 0.004449 | 0.1383 | 0.699 | 0.00445 | |
360 | 86.9 | 188 | 0.1 | 1 | 14.5 | 0.03339 | 0.06731 | 0.004202 | 0.1306 | 0.660 | 0.00420 | |
400 | 127 | 260 | 0.1 | 1 | 14.5 | 0.03005 | 0.06058 | 0.003782 | 0.1175 | 0.594 | 0.00378 | |
500 | 227 | 440 | 0.1 | 1 | 14.5 | 0.02404 | 0.04847 | 0.003026 | 0.09405 | 0.475 | 0.00303 | |
600 | 327 | 620 | 0.1 | 1 | 14.5 | 0.02004 | 0.04040 | 0.002522 | 0.07839 | 0.396 | 0.00252 | |
700 | 427 | 800 | 0.1 | 1 | 14.5 | 0.01718 | 0.03463 | 0.002162 | 0.06719 | 0.340 | 0.00216 | |
800 | 527 | 980 | 0.1 | 1 | 14.5 | 0.01503 | 0.03030 | 0.001892 | 0.05879 | 0.297 | 0.00189 | |
900 | 627 | 1160 | 0.1 | 1 | 14.5 | 0.01336 | 0.02693 | 0.001681 | 0.05225 | 0.264 | 0.00168 | |
1000 | 727 | 1340 | 0.1 | 1 | 14.5 | 0.01202 | 0.02424 | 0.001513 | 0.04703 | 0.238 | 0.00151 | |
Liquid | 20 | -253 | -424 | 1 | 10 | 145 | 35.86 | 72.29 | 4.513 | 140.3 | 709 | 4.51 |
31.24 | -241.9 | -403.4 | 1 | 10 | 145 | 24.63 | 49.65 | 3.100 | 96.34 | 487 | 3.10 | |
Gas | 31.24 | -241.9 | -403.4 | 1 | 10 | 145 | 7.098 | 14.31 | 0.8933 | 27.77 | 140 | 0.893 |
40 | -233 | -388 | 1 | 10 | 145 | 3.606 | 7.270 | 0.4539 | 14.11 | 71.3 | 0.454 | |
60 | -213 | -352 | 1 | 10 | 145 | 2.097 | 4.228 | 0.2639 | 8.204 | 41.5 | 0.264 | |
80 | -193 | -316 | 1 | 10 | 145 | 1.524 | 3.072 | 0.1918 | 5.961 | 30.1 | 0.192 | |
100 | -173 | -280 | 1 | 10 | 145 | 1.205 | 2.429 | 0.1516 | 4.713 | 23.8 | 0.152 | |
120 | -153 | -244 | 1 | 10 | 145 | 0.9995 | 2.015 | 0.1258 | 3.910 | 19.8 | 0.126 | |
140 | -133 | -208 | 1 | 10 | 145 | 0.8547 | 1.723 | 0.1076 | 3.343 | 16.9 | 0.108 | |
160 | -113 | -172 | 1 | 10 | 145 | 0.7470 | 1.506 | 0.09402 | 2.922 | 14.8 | 0.0940 | |
180 | -93.2 | -136 | 1 | 10 | 145 | 0.6637 | 1.338 | 0.08353 | 2.596 | 13.1 | 0.0835 | |
200 | -73.2 | -99.7 | 1 | 10 | 145 | 0.5972 | 1.204 | 0.07516 | 2.336 | 11.8 | 0.0752 | |
220 | -53.2 | -63.7 | 1 | 10 | 145 | 0.5432 | 1.095 | 0.06836 | 2.125 | 10.7 | 0.0684 | |
240 | -33.2 | -27.7 | 1 | 10 | 145 | 0.4980 | 1.004 | 0.06268 | 1.948 | 9.85 | 0.0627 | |
260 | -13.2 | 8.3 | 1 | 10 | 145 | 0.4597 | 0.9267 | 0.05785 | 1.798 | 9.09 | 0.0579 | |
280 | 6.9 | 44.3 | 1 | 10 | 145 | 0.4269 | 0.8607 | 0.05373 | 1.670 | 8.44 | 0.0537 | |
300 | 26.9 | 80.3 | 1 | 10 | 145 | 0.3986 | 0.8035 | 0.05016 | 1.559 | 7.88 | 0.0502 | |
320 | 46.9 | 116 | 1 | 10 | 145 | 0.3737 | 0.7534 | 0.04703 | 1.462 | 7.39 | 0.0470 | |
340 | 66.9 | 152 | 1 | 10 | 145 | 0.3518 | 0.7093 | 0.04428 | 1.376 | 6.96 | 0.0443 | |
360 | 86.9 | 188 | 1 | 10 | 145 | 0.3323 | 0.6700 | 0.04183 | 1.300 | 6.57 | 0.0418 | |
400 | 127 | 260 | 1 | 10 | 145 | 0.2993 | 0.6033 | 0.03766 | 1.171 | 5.92 | 0.0377 | |
500 | 227 | 440 | 1 | 10 | 145 | 0.2396 | 0.4830 | 0.03015 | 0.9372 | 4.74 | 0.0302 | |
600 | 327 | 620 | 1 | 10 | 145 | 0.1998 | 0.4027 | 0.02514 | 0.7814 | 3.95 | 0.0251 | |
700 | 427 | 800 | 1 | 10 | 145 | 0.1713 | 0.3454 | 0.02156 | 0.6702 | 3.39 | 0.0216 | |
800 | 527 | 980 | 1 | 10 | 145 | 0.1500 | 0.3023 | 0.01887 | 0.5866 | 2.96 | 0.0189 | |
900 | 627 | 1160 | 1 | 10 | 145 | 0.1333 | 0.2688 | 0.01678 | 0.5216 | 2.64 | 0.0168 | |
1000 | 727 | 1340 | 1 | 10 | 145 | 0.1200 | 0.2420 | 0.01511 | 0.4696 | 2.37 | 0.0151 | |
Liquid | 25 | -248 | -415 | 5 | 50 | 725 | 35.66 | 71.89 | 4.488 | 139.5 | 705 | 4.49 |
Supercritical phase | 100 | -173 | -280 | 5 | 50 | 725 | 5.968 | 12.03 | 0.7511 | 23.35 | 118 | 5.98 |
175 | -98.2 | -145 | 5 | 50 | 725 | 3.313 | 6.679 | 0.4170 | 12.96 | 65.5 | 0.417 | |
250 | -23.2 | -9.7 | 5 | 50 | 725 | 2.327 | 4.691 | 0.2928 | 9.102 | 46.0 | 0.293 | |
325 | 51.9 | 125 | 5 | 50 | 725 | 1.799 | 3.627 | 0.2264 | 7.037 | 35.6 | 0.226 | |
400 | 127 | 260 | 5 | 50 | 725 | 1.468 | 2.959 | 0.1848 | 5.742 | 29.0 | 0.185 | |
Liquid | 25 | -248 | -415 | 10 | 100 | 1450 | 37.93 | 76.47 | 4.774 | 148.4 | 750 | 4.77 |
Supercritical phase | 100 | -173 | -280 | 10 | 100 | 1450 | 11.42 | 23.02 | 1.437 | 44.66 | 226 | 1.44 |
175 | -98.2 | -145 | 10 | 100 | 1450 | 6.370 | 12.84 | 0.8017 | 24.92 | 126 | 0.802 | |
250 | -23.2 | -9.7 | 10 | 100 | 1450 | 4.503 | 9.078 | 0.5667 | 17.61 | 89.0 | 0.567 | |
325 | 51.9 | 125 | 10 | 100 | 1450 | 3.501 | 7.057 | 0.4406 | 13.69 | 69.2 | 0.441 | |
400 | 127 | 260 | 10 | 100 | 1450 | 2.869 | 5.783 | 0.3610 | 11.22 | 56.7 | 0.361 |
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/in3 = 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)/yd3 = 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/in3 = 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)/yd3 = 0.0008428 ton(short)/yd3
- 1 lb/ft3 = 27 lb/yd3 = 0.009259 oz/in3 = 0.0005787 lb/in3 = 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/in3 = 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/in3 = 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/in3 = 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)
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