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13.3 hPa and mmHg conversion table
[Converting from hPa to mmHg]
hPa 0 10 20 30 40 50 60 70 80 90
mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg mmHg
500 375 383 390 398 405 413 420 428 435 443
600 450 458 465 473 480 488 495 503 510 518
700 525 533 540 548 555 563 570 578 585 593
800 600 608 615 623 630 638 645 653 660 668
900 675 683 690 698 705 713 720 728 735 743
1000 750 758 765 773 780 788 795 803 810 818
1100 825 833 840 848 855 863 870 878 885 893
1200 900 908 915 923 930 938 945 953 960 968
[Converting from mmHg to hPa]
mmHg 0 10 20 30 40 50 60 70 80 90
hPa hPa hPa hPa hPa hPa hPa hPa hPa hPa
400 533 547 560 573 587 600 613 627 640 653
500 667 680 693 707 720 733 747 760 773 787
600 800 813 827 840 853 867 880 893 907 920
700 933 947 960 973 987 1000 1013 1027 1040 1053
800 1067 1080 1093 1107 1120 1133 1147 1160 1173 1187
900 1200 1213 1227 1240 1253 1267 1280 1293 1307 1320
13.4 Error when no atmospheric correction is made
When measurement is carried out with no atmospheric correction (with the settings fixed
at a temperature of 15°C and an atmospheric pressure of 1013hPa or 760mmHg), the error
per 100 meters in temperature and pressure will be shown in the tables below.
• When the actual pressure is 1013hPa (760mmHg) and the temperature is 25°C,
conducting the measurement with the temperature left at 15°C will result in the
measurement being short by 0.9mm per 100 meters.
[Error table:When hPa (15°C, 1013hPa as standard)]
1200 1100 1013 900 800 700 600 500
45 2.0 -0.5 -2.6 -5.5 -8.0 -10.5 -13.0 -15.5
35 3.0 0.4 -1.8 -4.7 -7.3 -9.9 -12.5 -15.1
25 4.0 1.4 -0.9 -4.0 -6.6 -9.3 -12.0 -14.6
15 5.2 2.4 -0.0 -3.1 -5.9 -8.6 -11.4 -14.2
5 6.3 3.5 1.0 -2.2 -5.1 -8.0 -10.8 -13.7
-5 7.6 4.7 2.1 -1.3 -4.2 -7.2 -10.2 -13.1
-15 9.0 5.9 3.2 -0.2 -3.3 -6.4 -9.5 -12.6
72
C°
hPa
Unit:mm