40 bar ≈ 580.151 psi. To convert bars to pounds per square inch, multiply by 14.503768: 40 × 14.503768 = 580.151.
How to convert bars to pounds per square inch
psi = bar × 14.503768
- 1 bar = 14.503768 psi (and 1 psi = 0.0689476 bar).
- Multiply the amount by the factor: 40 × 14.503768 = 580.151.
- Answer: 40 bar ≈ 580.151 psi (rounded to 6 significant figures).
Bars to Pounds Per Square Inch table
| Bars (bar) | Pounds Per Square Inch (psi) |
|---|---|
| 35 bar | 507.632 psi |
| 36 bar | 522.136 psi |
| 37 bar | 536.639 psi |
| 38 bar | 551.143 psi |
| 39 bar | 565.647 psi |
| 40 bar | 580.151 psi |
| 41 bar | 594.654 psi |
| 42 bar | 609.158 psi |
| 43 bar | 623.662 psi |
| 44 bar | 638.166 psi |
| 45 bar | 652.67 psi |
| bar | psi |
|---|---|
| 1 bar | 14.5038 psi |
| 5 bar | 72.5188 psi |
| 10 bar | 145.038 psi |
| 50 bar | 725.188 psi |
| 100 bar | 1,450.38 psi |
| 1,000 bar | 14,503.8 psi |
Good to know
Most passenger-car tyres run at about 30–35 psi (≈ 207–241 kPa, 2.1–2.4 bar). Use the pressure on your vehicle’s door-jamb placard.
1 psi = 6.894757 kPa; 1 bar = 100 kPa ≈ 14.5038 psi.