Pressure conversion
factors
To convert |
Pa |
hPa |
kPa |
Bar |
mbar |
mm Hg |
psi |
atm |
torr |
mtorr |
ins. water |
cm. water |
||
to |
Pa |
Multiply by |
1 |
100 |
1000 |
100,000 |
100 |
133.322 |
6894.757 |
101325 |
133.28 |
0.133328 |
249.0889 |
98.0665 |
hPa |
0.01 |
1 |
10 |
1000 |
1 |
1.33322 |
68.947 57 |
1013.25 |
1.3332 |
0.001333 |
2.490889 |
0.98066 |
||
kPa |
0.001 |
0.1 |
1 |
100 |
0.1 |
0.133322 |
6.894757 |
101.325 |
0.13332 |
0.0001333 |
0.2490889 |
0.09806 |
||
Bar |
0.00001 |
0.001 |
0.01 |
1 |
0.001 |
0.001333 |
0.068948 |
1.01325 |
1.3328 x10-3 |
1.3328 x10-6 |
2.489 x10-3 |
0.000981 |
||
mbar |
0.01 |
1 |
10 |
1000 |
1 |
1.33312 |
68.948 |
1013.250 |
1.33322 |
1.3328 x10-3 |
2.489 |
0.980665 |
||
mm
Hg |
0.007500 615 |
0.750006 |
7.500615 |
750.0615 |
0.75006 |
1 |
51.72 |
760.000 |
1.00000 |
0.0001 |
1.868 320 |
0.73555 |
||
psi |
1.4504 x10-4 |
0.014 504 |
0.145038 |
14.503774 |
1.450 x10-2 |
0.019337 |
1 |
14.696 |
0.019337 |
1.934 x10-5 |
3.612 x 10-2 |
0.0142233 |
||
atm |
9.8693 ×10-6 |
9.986923 x10-4 |
0.009 869 |
0.98692 |
0.986923 x10-4 |
0.001315 |
0.068046 |
1 |
1.3158 x10-3 |
1.316 x10-6 |
2.458 x10-3 |
9.678 x10-4 |
||
torr |
7.5006 x10-3 |
0.75006 |
7.50067 |
750.2838 |
0.75028 |
1.000000 |
51.715 |
760 |
1 |
0.001 |
1.868 |
0.73556 |
||
mtorr |
7.5006 |
750.06 |
7500.617 |
7.5028 x10-5 |
750.28 |
1000.0001 |
51710 |
760000 |
1000 |
1 |
1.868 x10-3 |
73.5530 |
||
ins water |
4.01463 x10-3 |
0.401 463 |
4.01463 |
401.65 |
0.4018 |
0.53524 |
27.708 |
406.86 |
0.5353 |
5.353 x10-4 |
1 |
0.393700 |
||
cm water |
0.0102 |
1.01972 |
10.1972 |
1019.716 |
1.01972 |
1.35951 |
70.3069 |
1033.228 |
1.35951 |
0.0013595 |
2.539999 |
1 |
Notes:
A large number of units are used to measure pressure. Only a limited number are given here. The S.I.unit of pressure is the Pascal, Pa.
The Standard Atmosphere (atm) is an international reference pressure defined as 101325 Pa. In practice it has been replaced by the Bar.
The Technical Atmosphere (symbol: at) is a non-SI unit of pressure equal to one kg force per square centimeter. 1at = 0.96784 atm.
1 Pa = 1 N/m2 = 10−5 bar = 10.197×10−6 at = 9.8692×10
−6 atm.
No responsibility is taken for accuracy of the above conversion factors. Please forward any corrections to andy@cpd-dynamics.co.uk