Bar to PSI Conversion
Instant two-way converter: bar ↔ psi, plus kPa, MPa, kgf/cm² and atm. 100% free, runs in your browser — no sign-up, no server requests.
Bar ↔ PSI Converter
Tire Pressure Presets
Tap a preset to load it into the converter. Typical passenger-car placard values are 2.0–2.5 bar (29–36.3 psi).
Always follow the pressure on your driver's door placard — not the maximum printed on the tire sidewall. Need pressure for a different tire size? See our tire pressure calculator.
Quick Conversion Table
| Bar | PSI | kPa |
|---|---|---|
| 0.5 bar | 7.2519 | 50.0 |
| 1 bar | 14.5038 | 100.0 |
| 1.5 bar | 21.7557 | 150.0 |
| 2 bar | 29.0075 | 200.0 |
| 2.2 bar | 31.9083 | 220.0 |
| 2.5 bar | 36.2594 | 250.0 |
| 3 bar | 43.5113 | 300.0 |
| 4 bar | 58.0151 | 400.0 |
| 5 bar | 72.5189 | 500.0 |
| 8 bar | 116.0302 | 800.0 |
| 10 bar | 145.0377 | 1000.0 |
The Formula
bar → psi: psi = bar × 14.503773773
psi → bar: bar = psi × 0.0689475729317
Why 14.503773773? The bar is defined as exactly 100,000 Pa, and the psi is defined as exactly 6.894757293168 kPa. So 1 bar = 100,000 ÷ 6,894.757293168 = 14.503773773 psi. Both definitions are exact, so the factor is exact too.
Real-world checks: a standard 200 bar scuba fill = 2,900.75 psi; a typical workshop compressor set at 8 bar = 116.03 psi; 1 bar = 0.98692 atm and 1.01972 kgf/cm².
Related Pressure Tools
- Tire Pressure Calculator — correct pressure for your tire size, load and temperature (not just unit conversion).
- Nitrox Lab — scuba partial pressures, MOD and gas planning (200 bar ≈ 2,900 psi territory).
- Air Pressure at Altitude — how atmospheric pressure drops with elevation.
Frequently Asked Questions
How do I convert bar to psi?
Multiply the bar value by 14.503773773. For example, 2.5 bar × 14.503773773 = 36.2594 psi. The factor comes from the exact definitions: 1 bar = 100,000 Pa and 1 psi = 6.894757293168 kPa, so 1 bar = 100,000 / 6,894.757293168 = 14.503773773 psi.
How do I convert psi to bar?
Multiply the psi value by 0.0689475729317 (or divide by 14.503773773). For example, 100 psi × 0.0689475729317 = 6.8948 bar. Our converter on this page does both directions instantly.
Is 1 bar exactly equal to 100 kPa?
Yes. The bar is defined as exactly 100,000 pascals, and 1 kPa = 1,000 Pa, so 1 bar = 100 kPa exactly, with no rounding. Likewise 1 bar = 0.1 MPa exactly.
How many psi is 2.5 bar?
2.5 bar = 36.2594 psi. This is a very common conversion because many cars specify 2.5 bar as the tire pressure, which equals 36.3 psi rounded.
What is 100 psi in bar?
100 psi = 6.8948 bar (exactly 6.89475729317 bar). A quick mental trick: psi ÷ 14.5 ≈ bar.
What is 2.2 bar in psi?
2.2 bar = 31.9083 psi, usually rounded to 32 psi on tire gauges. Many passenger cars list 2.2 bar on the door placard as the standard tire pressure.
How many atm is 1 bar?
1 bar = 0.98692 atm. The standard atmosphere (atm = 101,325 Pa) is slightly larger than one bar (100,000 Pa), which is why the factor is just under 1.
How many kgf/cm² is 1 bar?
1 bar = 1.01972 kgf/cm². This unit is still common on older gauges and in some Asian workshops, so converters often show it alongside bar and psi.
What is normal car tire pressure in bar and psi?
Most passenger cars specify 2.0–2.5 bar (29–36.3 psi); the most common placard values are 2.2 bar = 31.9 psi and 2.5 bar = 36.3 psi. Always use the value on your driver's door placard, not the maximum printed on the tire sidewall.
How many psi is a 200 bar scuba tank?
200 bar = 2,900.75 psi, usually rounded to 2,900 psi. Standard aluminum scuba cylinders are filled to 200 bar (≈2,900 psi), and high-pressure steel tanks to 300 bar (≈4,351 psi).
Why does Europe use bar and the US use psi for tire pressure?
Europe adopted the metric bar because tire placards are specified in kPa/bar, while the US kept the imperial psi on gauges and door stickers. They measure the same pressure — 2.5 bar and 36.3 psi are the same value in different units.
Is this bar to psi converter free and offline?
Yes. The converter is 100% free and runs entirely in your browser — no account, no server requests, no data leaves your device. It works offline once the page is loaded.
Free tool by NRTechStudio