Pressure Conversion Chart
Pressure conversion chart: what 1 unit equals in Pa, kPa, MPa, bar, mbar, psi, atm, mmHg, mmH₂O and kgf/cm². Absolute and gauge references are kept separate.
For reference. Verify the application conditions and the applicable standard.
Columns
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Visible rows: 10
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| 1 unit | Pa | kPa | MPa | bar | mbar | psi | atm | mmHg | mmH₂O | kgf/cm² |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 Pa | 1 | 0.001 | 0.000001 | 0.00001 | 0.01 | 0.000145 | 0.00001 | 0.007501 | 0.101972 | 0.00001 |
| 1 kPa | 1000 | 1 | 0.001 | 0.01 | 10 | 0.145038 | 0.009869 | 7.500616 | 101.971621 | 0.010197 |
| 1 MPa | 1000000 | 1000 | 1 | 10 | 10000 | 145.037738 | 9.869233 | 7500.615758 | 101971.621298 | 10.197162 |
| 1 bar | 100000 | 100 | 0.1 | 1 | 1000 | 14.503774 | 0.986923 | 750.061576 | 10197.16213 | 1.019716 |
| 1 mbar | 100 | 0.1 | 0.0001 | 0.001 | 1 | 0.014504 | 0.000987 | 0.750062 | 10.197162 | 0.00102 |
| 1 psi | 6894.757293 | 6.894757 | 0.006895 | 0.068948 | 68.947573 | 1 | 0.068046 | 51.714925 | 703.06958 | 0.070307 |
| 1 atm | 101325 | 101.325 | 0.101325 | 1.01325 | 1013.25 | 14.695949 | 1 | 759.999892 | 10332.274528 | 1.033227 |
| 1 mmHg | 133.322387 | 0.133322 | 0.000133 | 0.001333 | 1.333224 | 0.019337 | 0.001316 | 1 | 13.5951 | 0.00136 |
| 1 mmH₂O | 9.80665 | 0.009807 | 0.00001 | 0.000098 | 0.098067 | 0.001422 | 0.000097 | 0.073556 | 1 | 0.0001 |
| 1 kgf/cm² | 98066.5 | 98.0665 | 0.098067 | 0.980665 | 980.665 | 14.223343 | 0.967841 | 735.559135 | 10000 | 1 |
Quick answers
- 1 bar = 100000 Pa = 1 bar = 14.503774 psi. View in table
- 1 psi = 6894.757293 Pa = 0.068948 bar = 1 psi. View in table
- 1 atm = 101325 Pa = 1.01325 bar = 14.695949 psi. View in table
- 1 kPa = 1000 Pa = 0.01 bar = 0.145038 psi. View in table
- 1 MPa = 1000000 Pa = 10 bar = 145.037738 psi. View in table
- 1 mmH₂O = 9.80665 Pa = 0.000098 bar = 0.001422 psi. View in table
Conditions and notes
Unit conversion at the same pressure reference. Does not convert between absolute and gauge pressure.
- mmHg is the conventional value. It does not have exactly the same definition as the torr.
- Changing a unit does not change the pressure reference.
Each row represents one unit of the starting pressure unit. Every column displays the same pressure in Pa using a different unit. For example, 1 bar is exactly 100000 Pa. The psi factor follows the international pound, standard gravity and international inch definitions. mmHg and mmH₂O are conventional pressure units. A physical liquid column also depends on temperature, density and local gravity.
Sources
This table is for preliminary reference. Check the applicable standard and product conditions before use.
- Source 1. SP 811:2008. Accessed: 2026-10-16
Data version: 2026-10-16