Vacuum Gauge Reading When Read at Altitude
Altitude Above Sea Level (feet) | Altitude Above Sea Level (meters) | Atmospheric Pressure (psi) | Maximum Vacuum Level Attainable (inches Hg) | Vacuum Level Loss at Altitude | Maximum Vacuum Level Possible at this Altitude |
0 | 0 | 14.70 | 29.921 | – | – |
1000 | 305 | 14.16 | 28.9 | 3.4% | 96.6% |
2000 | 610 | 13.66 | 27.8 | 7.1% | 92.9% |
3000 | 914 | 13.16 | 26.8 | 10.4% | 89.6% |
4000 | 1219 | 12.68 | 25.8 | 13.8% | 86.2% |
5000 | 1524 | 12.22 | 24.9 | 16.8% | 83.2% |
6000 | 1829 | 11.77 | 24.0 | 19.8% | 80.2% |
7000 | 2134 | 11.33 | 23.1 | 22.8% | 77.2% |
8000 | 2438 | 10.91 | 22.2 | 25.9% | 74.1% |
9000 | 2743 | 10.50 | 21.4 | 28.6% | 71.4% |
10,000 | 3048 | 10.10 | 20.6 | 31.3% | 68.7% |
11,000 | 3353 | 9.71 | 19.8 | 33.9% | 66.1% |
12,000 | 3658 | 9.34 | 19.0 | 36.5% | 63.5% |
13,000 | 3962 | 8.97 | 18.3 | 39.0% | 61.0% |
14,000 | 4267 | 8.62 | 17.5 | 41.4% | 58.6% |
15,000 | 4752 | 8.28 | 16.9 | 43.6% | 56.4% |
Conversion Chart
Pg-psig | Pa-psia | In. Hg | -mbar | Torr | -mm Hg | % Vacuum |
0.00 | 14.70 | 0 | 0.00 | 760.0 | 0.0 | 0.0 |
0.49 | 14.24 | 1 | 33.86 | 734.6 | 25.4 | 3.3 |
0.98 | 13.75 | 2 | 67.72 | 709.2 | 50.8 | 6.6 |
1.47 | 13.26 | 3 | 101.58 | 683.8 | 76.2 | 9.9 |
1.96 | 12.76 | 4 | 135.44 | 658.4 | 101.6 | 13.2 |
2.45 | 12.27 | 5 | 169.30 | 633.0 | 127.0 | 16.5 |
2.95 | 11.78 | 6 | 203.16 | 607.6 | 152.4 | 19.8 |
3.44 | 11.29 | 7 | 237.02 | 582.2 | 177.8 | 23.1 |
3.93 | 10.80 | 8 | 270.88 | 556.8 | 203.2 | 26.4 |
4.42 | 10.31 | 9 | 304.74 | 531.4 | 228.6 | 29.7 |
4.91 | 9.82 | 10 | 338.60 | 506.0 | 254.0 | 33.0 |
5.40 | 9.33 | 11 | 372.46 | 480.6 | 279.4 | 36.3 |
5.89 | 8.84 | 12 | 406.32 | 455.2 | 304.8 | 39.6 |
6.38 | 8.35 | 13 | 440.18 | 429.8 | 330.2 | 42.9 |
6.87 | 7.86 | 14 | 474.04 | 404.4 | 355.6 | 46.2 |
7.36 | 7.36 | 15 | 507.90 | 379.0 | 381.0 | 49.5 |
7.86 | 6.87 | 16 | 541.76 | 353.6 | 406.4 | 52.8 |
8.35 | 6.38 | 17 | 575.62 | 328.2 | 431.8 | 56.1 |
8.84 | 5.89 | 18 | 609.48 | 302.8 | 457.2 | 59.4 |
9.33 | 5.40 | 19 | 643.34 | 277.4 | 482.6 | 62.7 |
9.82 | 4.91 | 20 | 677.20 | 252.0 | 508.0 | 66.0 |
10.31 | 4.42 | 21 | 711.06 | 226.6 | 533.4 | 69.3 |
10.80 | 3.93 | 22 | 744.92 | 201.2 | 558.8 | 72.6 |
11.29 | 3.44 | 23 | 778.78 | 175.8 | 584.2 | 75.9 |
11.78 | 2.95 | 24 | 812.64 | 150.4 | 609.6 | 79.2 |
12.27 | 2.45 | 25 | 846.50 | 125.0 | 635.0 | 82.5 |
12.76 | 1.96 | 26 | 880.36 | 99.6 | 660.4 | 85.8 |
13.26 | 1.47 | 27 | 914.22 | 74.2 | 685.8 | 89.1 |
13.75 | 0.98 | 28 | 948.08 | 48.8 | 711.2 | 92.4 |
14.24 | 0.49 | 29 | 981.94 | 23.4 | 736.6 | 95.7 |
14.70 | 0.00 | 29.92 | 1013.00 | 0.0 | 760.0 | 100.0 |
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