Why Convert Bars to PSI?
Converting between bars (bar) and psi (psi) is one of the most common pressure conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert bar to psi saves time and prevents errors.
Pressure conversions between bar and psi are critical in automotive maintenance, meteorology, and diving. Tire pressure recommendations differ by region — European cars typically specify bar while US vehicles use PSI. Weather services report atmospheric pressure in different units: hPa/mbar in most countries, mmHg (inHg) in the US. Scuba divers must understand ATM conversions to calculate safe diving depths and decompression schedules.
How to Convert Bars to PSI
To convert bars to psi, use the following formula:
psi = bar × 14.50377377
Example: 1 bar = 14.50377377 psi
For example, 5 bar = 72.51886887 psi, 10 bar = 145.0377377 psi, and 100 bar = 1450.377377 psi. Our calculator above performs this conversion instantly with full precision — no rounding errors.
Common Use Cases
- Typical passenger car tire pressure: 2.3 bar = 33.35867968 psi
- Fully loaded SUV tire pressure: 2.8 bar = 40.61056656 psi
- Truck tire pressure: 8 bar = 116.0301902 psi
- Road bicycle tire pressure: 4 bar = 58.01509509 psi
- Scuba diving tank pressure: 200 bar = 2900.754755 psi
Common Mistakes to Avoid
- Gauge vs absolute: Tire pressure gauges read relative to atmospheric pressure (gauge pressure). Add 1 atm (~14.7 psi) to get absolute pressure.
- Bar vs ATM confusion: 1 bar ≈ 0.987 atm — they're close but not equal. For precise work, don't interchange them.
- Unit proliferation: Pressure has many units (Pa, bar, psi, atm, mmHg, torr). Always confirm which unit your equipment uses.
Pro Tips
- Memorize the factor: 1 bar = 14.50377377 psi. For quick mental math, remember this base conversion.
- Quick reference: 5 bar = 72.51886887 psi · 10 bar = 145.0377377 psi · 25 bar = 362.5943443 psi · 50 bar = 725.1886887 psi · 100 bar = 1450.377377 psi
- Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.
Bars to PSI Conversion Table
| bar | psi |
|---|---|
| 0.01 bar | 0.1450377377 psi |
| 0.1 bar | 1.450377377 psi |
| 0.5 bar | 7.251886887 psi |
| 1 bar | 14.50377377 psi |
| 2 bar | 29.00754755 psi |
| 5 bar | 72.51886887 psi |
| 10 bar | 145.0377377 psi |
| 20 bar | 290.0754755 psi |
| 50 bar | 725.1886887 psi |
| 100 bar | 1450.377377 psi |
| 500 bar | 7251.886887 psi |
| 1000 bar | 14503.77377 psi |
Values are calculated with 10-digit precision based on NIST SP 811 conversion factors.