Bar to PSI Converter
Convert Bar to PSI — free, instant, accurate. Part of Pressure converters.
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Bar to PSI: values and formula
1 Bar = 14.503768079 PSI, and 1 PSI = 0.0689476 Bar. To convert a pressure value from Bar to PSI, multiply it by 14.503768079. For example, 10 Bar equals 145.03768079 PSI, and 250 Bar equals 3625.9420197 PSI.
| Bar | PSI |
|---|---|
| 1 Bar | 14.503768079 PSI |
| 2 Bar | 29.007536158 PSI |
| 5 Bar | 72.518840395 PSI |
| 10 Bar | 145.03768079 PSI |
| 25 Bar | 362.59420197 PSI |
| 50 Bar | 725.18840395 PSI |
| 100 Bar | 1450.3768079 PSI |
| 500 Bar | 7251.8840395 PSI |
| 1000 Bar | 14503.768079 PSI |
When to use the Bar to PSI converter
- Tyre inflation — converting psi to bar and kPa.
- Weather forecasting — reading atmospheric pressure in hPa, mbar, or inHg.
- Industrial systems — specifying gauge and absolute pressure.
- Medical — reading blood pressure in mmHg.
A short history of pressure units
Pressure was first measured systematically by Torricelli in 1643 with the mercury barometer, giving rise to "torr" and "millimetres of mercury". The pascal (1 N/m²) became the SI unit. Atmospheric science uses bars and millibars, weather forecasting uses hPa, tyres use psi or bar, and meteorologists still quote inches of mercury in some regions.
Common mistakes when converting pressure
Gauge vs absolute pressure
"100 psi" usually means gauge pressure (above atmospheric). Absolute pressure adds about 14.7 psi.
Confusing bar and atm
1 bar is 100,000 Pa; 1 atm is 101,325 Pa. Close but not equal.
inHg unit ambiguity
Inches of mercury at 0°C and 60°F differ slightly — use 0°C (3386.39 Pa per inch) for scientific work.
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