Most compressed air specifications quote gauge pressure, marked (g), which reads zero at local atmospheric pressure. Absolute pressure, marked (a), starts from a perfect vacuum and is the figure that compressor sizing, pressure ratios and dew point calculations use. Use this converter to switch between bar, kPa, psi, MPa and other units in gauge or absolute terms, corrected for your site altitude.
Convert pressure units
Choose gauge or absolute, enter a value and read every equivalent.
| Unit | Gauge (g) | Absolute (a) |
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