1976 Standard Atmosphere Table Altitude Temperature Pressure Density Speed of sound [m] [Kelvin] [pascal] [kg/m3] [m/s] 0 288.15 101325 1.225 340.2941 1000 281.65 89874.5705 1.1116 336.434 2000 275.15 79495.2155 1.0065 332.5292 3000 268.65 70108.5447 .9091 328.578 4000 262.15 61640.2353 .8191 324.5787 5000 255.65 54019.9121 .7361 320.5295 6000 249.15 47181.0276 .6597 316.4284 7000 242.65 41060.7432 .5895 312.2736 8000 236.15 35599.8114 .5252 308.0626 9000 229.65 30742.4584 .4663 303.7934 10000 223.15 26436.2676 .4127 299.4632 11000 216.65 22632.064 .3639 295.0696 12000 216.65 19330.405 .3108 295.0696 13000 216.65 16510.4058 .2655 295.0696 14000 216.65 14101.7996 .2268 295.0696 15000 216.65 12044.5709 .1937 295.0696 16000 216.65 10287.4591 .1654 295.0696 17000 216.65 8786.6821 .1413 295.0696 18000 216.65 7504.8447 .1207 295.0696 19000 216.65 6410.0069 .1031 295.0696 20000 216.65 5474.8887 0.088 295.0696 21000 217.65 4677.8862 0.0749 295.7498 22000 218.65 3999.7902 0.0637 296.4284 23000 219.65 3422.4343 0.0543 297.1055 24000 220.65 2930.4922 0.0463 297.781 25000 221.65 2511.0234 0.0395 298.455 26000 222.65 2153.0938 0.0337 299.1275 27000 223.65 1847.4574 0.0288 299.7985 28000 224.65 1586.2898 0.0246 300.468 29000 225.65 1362.9648 0.021 301.136 30000 226.65 1171.8665 0.018 301.8026 31000 227.65 1008.232 0.0154 302.4676 32000 228.65 868.0187 0.0132 303.1312 33000 231.45 748.2282 0.0113 304.9816 34000 234.25 646.1222 0.0096 306.8208 35000 237.05 558.9235 0.0082 308.6491 36000 239.85 484.3167 0.007 310.4666 37000 242.65 420.3671 0.006 312.2736 38000 245.45 365.4547 0.0052 314.0701 39000 248.25 318.2205 0.0045 315.8564 40000 251.05 277.5216 0.0039 317.6327 41000 253.85 242.3955 0.0033 319.3991 42000 256.65 212.0299 0.0029 321.1557 43000 259.45 185.7378 0.0025 322.9029 44000 262.25 162.9374 0.0022 324.6406 45000 265.05 143.1348 0.0019 326.369 46000 267.85 125.9103 0.0016 328.0884 47000 270.65 110.9063 0.0014 329.7988 48000 270.65 97.7545 0.0013 329.7988 49000 270.65 86.1623 0.0011 329.7988 50000 270.65 75.9448 0.001 329.7988 51000 270.65 66.9389 0.0009 329.7988 52000 267.85 58.9622 0.0008 328.0884 53000 265.05 51.8668 0.0007 326.369 54000 262.25 45.5632 0.0006 324.6406 55000 259.45 39.97 0.0005 322.9029 56000 256.65 35.0137 0.0005 321.1557 57000 253.85 30.6274 0.0004 319.3991 58000 251.05 26.7509 0.0004 317.6327 59000 248.25 23.3296 0.0003 315.8564 60000 245.45 20.3143 0.0003 314.0701 61000 242.65 17.6606 0.0003 312.2736 62000 239.85 15.3287 0.0002 310.4666 63000 237.05 13.2826 0.0002 308.6491 64000 234.25 11.49 0.0002 306.8208 65000 231.45 9.922 0.0001 304.9816 66000 228.65 8.5527 0.0001 303.1312 67000 225.85 7.359 0.0001 301.2695 68000 223.05 6.3199 0.0001 299.3961 69000 220.25 5.4172 0.0001 297.511 70000 217.45 4.6342 0.0001 295.6138 71000 214.65 3.9564 0.0001 293.7044 72000 212.65 3.3718 0.0001 292.3329 73000 210.65 2.8692 0 290.955 74000 208.65 2.4377 0 289.5705 75000 206.65 2.0679 0 288.1793 76000 204.65 1.7514 0 286.7814 77000 202.65 1.4809 0 285.3766 78000 200.65 1.2501 0 283.9649 79000 198.65 1.0535 0 282.5461 80000 196.65 .8863 0 281.1202 81000 194.65 .7443 0 279.687 82000 192.65 .6239 0 278.2464 83000 190.65 .522 0 276.7983 84000 188.65 .436 0 275.3426 85000 186.946 .3634 0 274.0963 86000 186.946 .3027 0 274.0963