Unit of Measure Conversions
Pressure Conversions
Additional Units and Information
| Name | Symbol | Value | Description/Notes |
|---|---|---|---|
| dyne/sq.centimetre | dyn/cm² | 1 barye | Equivalent to 1/10 pascal |
| kip/sq.inch | ksi | 6.894757 x 106 pascals | 1 kip = 1,000 poundsforce |
| millibar | mbar | 1000 barye; 100 pascals |
Equivalent to 1/1000 bar |
| millimetre mercury | mm-Hg | 1 torr | |
| newton/sq.metre | N/m² | 1 pascal | Equivalent to 10 baryes |
| pièze | pz | 1,000 pascals | |
| poundal/sq.foot | pdl/ft² | 1.488164 pascals | |
| poundforce/sq.foot | lbf/ft² | 47.88026 pascals | |
| psi | 14.6959 pounds/sq.inch | Atmospheric pressure at sea level |
Useful Approximations
| Approximation | % Accuracy |
|---|---|
| The pressure on an object in water increases by ½ psi per foot of depth | 86.7 |
| 1 poundforce/sq.inch ≈ 2 inches mercury | 98.2 |
| 1 poundforce/sq.inch ≈ 50 torr | 96.7 |
| 1 bar ≈ 750 torr | 99.9 |
| 1 atmosphere ≈ 1 bar | 98.7 |
| 1 atmosphere ≈ 1 kilogramforce/sq.centimetre | 96.9 |