psi to bar Converter (Tire Pressure Chart)
Convert pounds per square inch to bar for tire pressure, air compressors and pressure washers. 1 psi = 0.0689476 bar: 32 psi is 2.21 bar and 35 psi is 2.41 bar.
Real-World Benchmarks
Multi-Unit Conversion Matrix
| Group | Measurement | Symbol | Equivalent Value |
|---|---|---|---|
| SI & Metric | Pascal | Pa | 220,632.2334 |
| SI & Metric | Hectopascal | hPa | 2,206.3223 |
| SI & Metric | Kilopascal | kPa | 220.6322 |
| SI & Metric | Megapascal | MPa | 0.2206 |
| SI & Metric | Bar | bar | 2.2063 |
| SI & Metric | Millibar | mbar | 2,206.3223 |
| SI & Metric | Kilogram-force per cm² | kgf/cm² | 2.2498 |
| Imperial & US Customary | Pound per Square Inch | psi | 32 |
| Imperial & US Customary | Kilopound per Square Inch | ksi | 0.032 |
| Atmospheric & Manometric | Standard Atmosphere | atm | 2.1775 |
| Atmospheric & Manometric | Torr | Torr | 1,654.8778 |
| Atmospheric & Manometric | Millimeter of Mercury | mmHg | 1,654.8776 |
| Atmospheric & Manometric | Inch of Mercury | inHg | 65.1527 |
| Atmospheric & Manometric | Inch of Water | inH₂O | 885.757 |
Step-by-Step Mathematical Explanation
- Step 1: Convert 32 psi to the base unit (Pa): 32 × 6,894.75729317 = 220,632.233381 Pa.
- Step 2: Convert base pascals to bars: 220,632.233381 ÷ 100,000 = 2.206322 bar.
- Direct factor: 1 psi = 0.06894757 bar.
Essential Conversion Factors
Pound per Square Inch: US tire, air compressor and hydraulic pressure
psi to bar formula
Direct Answer: 1 psi = 0.068947573 bar, so multiply by 0.068947573: bar = psi × 0.068947573. Going back: psi = bar × 14.503774.
How to convert pounds per square inch to bars
One psi is one pound-force on one square inch, which is 6,894.757 pascals. One bar is exactly 100,000 Pa, so psi ÷ 14.5038 = bar. Both scales usually measure gauge pressure (above atmospheric), so a tire at 32 psi or 2.2 bar reads the same on either gauge.
1. psi → bar
Multiply the number of pounds per square inch by the conversion factor:
Example: 32 psi × 0.068947573 = 2.206 bar.
2. bar → psi
To go back, divide by the same factor, or multiply by its reciprocal, 14.503774:
Example: 2.206 bar ÷ 0.068947573 = 32 psi.
Mental math: divide by 14.5
Divide by 15, then add about 3%. Dividing by 14.5 is almost exact:
36 psi: 36 ÷ 14.5 = 2.48 bar (exact: 2.482 bar).
1 psi in other pressure units
| Unit | 1 psi equals | Typical use |
|---|---|---|
| Pascal | 6,894.7573 Pa | SI unit of pressure (1 N/m²) |
| Hectopascal | 68.947573 hPa | Weather maps and barometers (= 1 mbar) |
| Kilopascal | 6.8947573 kPa | Tire pressure in Canada, Australia and Asia |
| Megapascal | 0.0068947573 MPa | Material strength and hydraulics (= 1 N/mm²) |
| Bar | 0.068947573 bar | European tire, espresso and diving pressure |
| Millibar | 68.947573 mbar | Meteorology and gas appliances |
| Kilogram-force per cm² | 0.070306958 kgf/cm² | Technical atmosphere (at), older gauges |
| Kilopound per Square Inch | 0.001 ksi | Steel and material yield strength (1,000 psi) |
| Standard Atmosphere | 0.068045964 atm | Mean sea-level air pressure |
| Torr | 51.714933 Torr | Vacuum systems (1/760 atm) |
| Millimeter of Mercury | 51.714925 mmHg | Blood pressure readings |
| Inch of Mercury | 2.0360205 inHg | US aviation altimeters and weather |
| Inch of Water | 27.679905 inH₂O | HVAC duct and low gas pressures |
psi to bar chart
| psi | bar |
|---|---|
| 1 | 0.069 |
| 5 | 0.345 |
| 10 | 0.689 |
| 14.5 | 1 |
| 15 | 1.034 |
| 20 | 1.379 |
| 25 | 1.724 |
| 28 | 1.931 |
| 30 | 2.068 |
| 32 | 2.206 |
| 33 | 2.275 |
| 34 | 2.344 |
| 35 | 2.413 |
| 36 | 2.482 |
| 38 | 2.62 |
| 40 | 2.758 |
| 42 | 2.896 |
| 44 | 3.034 |
| 45 | 3.103 |
| 50 | 3.447 |
| 60 | 4.137 |
| 65 | 4.482 |
| 80 | 5.516 |
| 90 | 6.205 |
| 100 | 6.895 |
| 120 | 8.274 |
| 150 | 10.342 |
| 200 | 13.79 |
| 300 | 20.684 |
| 1,000 | 68.948 |
| 3,000 | 206.843 |
bar to psi chart
| bar | psi |
|---|---|
| 0.5 | 7.25 |
| 1 | 14.5 |
| 1.5 | 21.76 |
| 1.8 | 26.11 |
| 2 | 29.01 |
| 2.1 | 30.46 |
| 2.2 | 31.91 |
| 2.3 | 33.36 |
| 2.4 | 34.81 |
| 2.5 | 36.26 |
| 2.6 | 37.71 |
| 2.8 | 40.61 |
| 3 | 43.51 |
| 3.5 | 50.76 |
| 4 | 58.02 |
| 5 | 72.52 |
| 6 | 87.02 |
| 7 | 101.53 |
| 8 | 116.03 |
| 9 | 130.53 |
| 10 | 145.04 |
| 12 | 174.05 |
| 15 | 217.56 |
| 20 | 290.08 |
| 50 | 725.19 |
| 100 | 1,450.38 |
| 200 | 2,900.75 |
| 300 | 4,351.13 |
Frequently Asked Questions
What is 35 psi in bar?
35 psi is 2.413 bar (35 × 0.068947573).
What is 3,000 psi in bar?
3,000 psi is 206.843 bar (3,000 × 0.068947573).
What is normal tire pressure in psi and bar?
Most passenger cars run 30–36 psi (2.1–2.5 bar) cold. The correct value for your car is on the door-pillar sticker or in the handbook, often in both units.
Is bar the same as atmospheres?
Close but not equal: 1 bar = 100,000 Pa, while 1 standard atmosphere = 101,325 Pa = 14.696 psi. The difference is 1.3%.