Bar to PSI Converter
Updated Formulas shown
Multiply bar by 14.5038 to get psi: 2.5 bar = 36.26 psi. One bar is 100 kPa — very close to atmospheric pressure (1.01325 bar).
Formula: pounds per square inch = bar × 14.503773773 (exact ratio, shown rounded)
Common values: bar → pounds per square inch
| bar | pounds per square inch |
|---|---|
| 14.5038 psi | |
| 29.0075 psi | |
| 43.5113 psi | |
| 72.5189 psi | |
| 145.038 psi | |
| 290.075 psi | |
| 362.594 psi | |
| 725.189 psi | |
| 1,450.38 psi | |
| 3,625.94 psi | |
| 7,251.89 psi | |
| 14,503.8 psi |
2.5 bar in every pressure unit
- 250,000 Pa
- 250 kPa
- 0.25 MPa
- 2,500 mbar
- 36.2594 psi
- 5,221.36 psf
- 2.46731 atm
- 1,875.15 mmHg
- 73.825 inHg
- 1,003.66 in H₂O
How to convert bar to pounds per square inch
- Type the value in bar into the converter (or into the right-hand box to go the other way).
- Multiply by 14.503773773 to get pounds per square inch.
- Round to a sensible precision with the Decimals control; the table below covers the values people look up most.
Bar to pound per square inch formula
pounds per square inch = bar × 14.503773773 — 1 bar = 14.50377377 psi. Both units are defined exactly (NIST SP 811); the factor above is rounded to 10 decimals, and the converter uses the full-precision ratio.
bar to psi conversion table
| bar | psi | kPa |
|---|---|---|
| 0.5 | 7.3 | 50 |
| 1 | 14.5 | 100 |
| 1.5 | 21.8 | 150 |
| 2 | 29 | 200 |
| 2.5 | 36.3 | 250 |
| 3 | 43.5 | 300 |
| 3.5 | 50.8 | 350 |
| 4 | 58 | 400 |
| 4.5 | 65.3 | 450 |
| 5 | 72.5 | 500 |
| 5.5 | 79.8 | 550 |
| 6 | 87 | 600 |
| 6.5 | 94.3 | 650 |
| 7 | 101.5 | 700 |
| 7.5 | 108.8 | 750 |
| 8 | 116 | 800 |
| 8.5 | 123.3 | 850 |
| 9 | 130.5 | 900 |
| 9.5 | 137.8 | 950 |
| 10 | 145 | 1,000 |
Pressure washers
| bar | psi |
|---|---|
| 100 | 1,450 |
| 110 | 1,595 |
| 120 | 1,740 |
| 130 | 1,885 |
| 140 | 2,031 |
| 150 | 2,176 |
| 160 | 2,321 |
| 180 | 2,611 |
| 200 | 2,901 |
| 250 | 3,626 |
| 300 | 4,351 |
Boiler pressure
A sealed (combi) heating system should read about 1–1.5 bar (14.5–21.8 psi) when cold and rise to around 2 bar when hot. The relief valve opens at 3 bar (43.5 psi). If the gauge keeps falling below 1 bar, there's a leak or a failing expansion vessel.
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Frequently asked questions
What is 2.5 bar in psi?
36.26 psi.
What is 1 bar in psi?
14.5038 psi.
Is 150 bar good for a pressure washer?
150 bar (2,176 psi) is a strong electric machine — fine for decks, patios and cars.
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Estimates only. Check quantities with your supplier or contractor before ordering.