| Pressure
Unit Value |
|
in
mercury (°C) (32°F) |
millibars
(mB) (hPa) |
lb/sq
in (psi) |
lb/sq
ft (psf) |
grams/sq
cm |
in
water (68°F)(20°C) |
in
water (60°F) |
ft
water (50°F) (10°C) |
in
water (4C) (39.2°F) |
cm
water (25°C) (77°F) |
cm
water (20°C) (68°F) |
cm
water (4°C) (39.2°F) |
atmosphere |
mm Hg
(0 C) |
1 |
0.039370 |
1.3332 |
0.019337 |
2.7845 |
1.3595 |
0.53620 |
0.53577 |
0.044617 |
0.53525 |
1.3635 |
1.3620 |
1.3595 |
0.00131579 |
in Hg
(0 C) |
25.400 |
1 |
33.864 |
0.49115 |
70.726 |
34.532 |
13.620 |
13.609 |
1.1333 |
13.595 |
34.634 |
34.594 |
34.532 |
0.033421 |
| millibars |
0.75006 |
0.029530 |
1 |
0.014504 |
2.0885 |
1.0197 |
0.40218 |
0.40186 |
0.033465 |
0.40147 |
1.0227 |
1.0215 |
1.0197 |
0.00098692 |
| lb/sq
in |
51.715 |
2.0360 |
68.948 |
1 |
144 |
70.307 |
27.730 |
27.707 |
2.3073 |
27.681 |
70.515 |
70.433 |
70.309 |
0.068046 |
| lb/sq
ft |
0.35913 |
0.014139 |
0.47880 |
0.0069444 |
1 |
0.48824 |
0.19257 |
0.19241 |
0.016023 |
0.19223 |
0.48969 |
0.48912 |
0.48826 |
0.00047254 |
| grams/sq
cm |
0.73556 |
0.028959 |
0.98067 |
0.014223 |
2.0482 |
1 |
0.39441 |
0.39409 |
0.032818 |
0.39371 |
1.0030 |
1.0018 |
1.0000 |
0.00096784 |
| in water
(68° F) |
1.8650 |
0.073424 |
2.4864 |
0.036063 |
5.1930 |
2.5354 |
1 |
0.99919 |
0.083209 |
0.99823 |
2.5430 |
2.5400 |
2.5355 |
0.0024539 |
| in water
(60° F) |
1.8665 |
0.073483 |
2.4884 |
0.036092 |
5.1972 |
2.5375 |
1.0008 |
1 |
0.083276 |
0.99904 |
2.5450 |
2.5421 |
2.5376 |
0.0024559 |
| ft water
(50° F) |
22.413 |
0.88241 |
29.882 |
0.43340 |
62.409 |
30.471 |
12.018 |
12.008 |
1 |
11.997 |
30.561 |
30.526 |
30.472 |
0.029491 |
| in water
(4° C) |
1.8683 |
0.073554 |
2.4908 |
0.036126 |
5.2022 |
2.5399 |
1.0018 |
1.0010 |
0.083356 |
1 |
2.5475 |
2.5445 |
2.5400 |
0.0024582 |
| cm water
(25 C) |
0.73339 |
0.028874 |
0.97777 |
0.014181 |
2.0421 |
0.99705 |
0.39324 |
0.39293 |
0.032721 |
0.39255 |
1 |
0.99884 |
0.99707 |
0.00096498 |
| cm water
(20 C) |
0.73424 |
0.028907 |
0.97891 |
0.014198 |
2.0445 |
0.99821 |
0.39370 |
0.39338 |
0.032759 |
0.39301 |
1.0012 |
1 |
0.99823 |
0.00096611 |
| cm water
(4 C) |
0.73554 |
0.028958 |
0.98064 |
0.014223 |
2.0481 |
0.99997 |
0.39440 |
0.39408 |
0.032817 |
0.39370 |
1.0029 |
1.0018 |
1 |
0.00096781 |
| atmosphere |
760 |
29.9213 |
1013.250 |
14.69595 |
2116.22 |
1033.227 |
407.51 |
407.18 |
33.909 |
406.79 |
1036.29 |
1035.08 |
1033.26 |
1 |
| 1 millibar =
1000 dynes per sq cm |
1 millibar =
100 pascals = 1 hectopascal (hPa) |
| 1 centibar = 10 millibars
= 1 kPa (kilopascal) |
1 bar = 1000 millibars |
| 1 kg per sq meter = 0.1
gram per sq cm |
1 kg per sq cm = 1000 grams
per sq cm |
| 1 gram per sq meter = 0.0001
gram per sq cm |
1 mm Hg = 1000 microns |
| 1 inch = 2.54 centimeters |
|
| NOTE: All conversions
related to the height of a column of liquid are specified
at a specific temperature. This is because the density
of the fluid changes with temperature. |
NOTE: Conversions
are based on the Standard Acceleration of Gravity or
Standard normal gravity which is 9.80665 m/s2 = 32.1740
ft/s2 |
| Conversion
Table Use |
| Find the units you have
in the left column. Look across the table to find the
units you wish to convert to. The value that is contained
in that row and column is the multiplier that converts
from the units that you have to the units you want. |
| EXAMPLE: PSI TO FEET |
EXAMPLE: PSI TO PASCALS |
| To convert 22 PSI into feet of water
at 50°F, find the row that is labeled “lb per sq in.”
Look across to the column labeled “ft water (50°F).”
The number at that intersection is 2.3073. Multiply
by 2.3073 to convert to ft of water. |
To convert 22 PSI to Pascals, first
convert to millibars and then multiply by 100 since
1 millibar is 100 pascals.
|
| 22
PSI * 2.3073 = 50.760 ft. |
22
PSI * 68.948 *100 = 151685.6 Pascals |
| Therefore 22 PSI is the same as 50.761 ft of water
at (50°F). |
Therefore, 22 PSI is the same as 151686 Pascals. |
|
