PSI to Pascal Converter
Common Conversions
| psi | Pa |
|---|---|
| 0.01 | 68.948 |
| 0.1 | 689.476 |
| 0.25 | 1723.69 |
| 0.5 | 3447.38 |
| 1 | 6894.76 |
| 2 | 13789.5 |
| 5 | 34473.8 |
| 10 | 68947.6 |
| 25 | 172369 |
| 50 | 344738 |
| 100 | 689476 |
| 1000 | 6894760 |
Why this conversion matters in chemistry
Pressure-vessel hydrotest math is a worked example. A 150 psi US-side hydrotest pressure becomes 1.034 MPa on the SI-side stress-analysis input for an ASME Section VIII Div 2 calculation, where every material-property correlation and every mesh-node stress output runs in pascals. The constant of 6894.76 Pa per psi comes from 1 psi = (1 lb × 4.4482 N/lb) / (1 in² × 645.16 mm²) = 6894.76 N/m². Mostly bookkeeping at the boundary of US-customary engineering specs and SI scientific calculations.
Formula
Pa = psi × 6894.76
Worked Examples
14.696 psi = 101325 Pa
Standard atmospheric pressure expressed in both unit systems.
1 psi = 6894.76 Pa
The conversion anchor — useful for any quick scale check.
10 psi = 68947.6 Pa
About a low-pressure compressed-gas reading.
100 psi = 689476 Pa
About a high-pressure gas-cylinder regulator output.
Frequently Asked Questions
How do I convert psi to pascals?
Multiply by 6894.76. So 1 psi = 6894.76 Pa. The factor is exact through the international pound and inch definitions.
Why use pascals instead of psi?
Pascals are the SI base pressure unit, required by scientific publications, thermodynamic equations (PV = nRT with R = 8.314 J/(mol·K)), and international engineering data exchange. The Pa-only convention keeps unit consistency clean across cross-system calculations.
How do Pa, kPa, and psi relate?
1 psi = 6894.76 Pa = 6.89476 kPa. For quick estimation, 1 psi ≈ 6.9 kPa — close enough for any quick pressure check on the back of an envelope.