Convert Bars to Pounds per square inch
1 bar is 14.503774 psi. One bar is exactly 14.503773773 pounds per square inch.
One bar is 14.503774 pounds per square inch. To convert bars to pounds per square inch, multiply by 14.503774; to go the other way, divide by 14.503774 or multiply by 0.068947573. The factor is exact rather than rounded: it follows from NIST Special Publication 811. Exactly 100,000 pascals by definition, chosen because it sits within a per cent of atmospheric pressure at sea level.
Factor checked against the defining standard · How we check
- Bars × 14.503774
value * 14.50377377314.504 psi
1 bar in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch | 14.50377377 psi | × 14.503773773 |
| bars (as entered) | 1 bar | — |
| pascals | 100,000 Pa | × 100,000 |
| kilopascals | 100 kPa | × 100 |
| megapascals | 0.1 MPa | × 0.1 |
| atmospheres | 0.9869232667 atm | × 0.986923266716 |
| torr | 750.0616827 Torr | × 750.061682704 |
| inches of mercury | 29.52998016 inHg | × 29.5299801647 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert bars to pounds per square inch?
- 1.Take the measurement in bars.
- 2.Multiply by 14.503774 — that is how many pounds per square inch fit in one bar.
- 3.To go back the other way, divide by 14.503774, or multiply by 0.068947573.
Worked example: 25 bars to pounds per square inch
- Formula
- bar × 14.503774 = psi
- Arithmetic
- 25 × 14.503774 = 362.594344 psi
- Answer
- 25 bar = 362.594344 psi
The factor is rounded for display; the figure above is computed from the full value.
Bars to pounds per square inch conversion table
| Bars | Pounds per square inch |
|---|---|
| 1 bar | 14.503774 psi |
| 2 bar | 29.007548 psi |
| 3 bar | 43.511321 psi |
| 4 bar | 58.015095 psi |
| 5 bar | 72.518869 psi |
| 6 bar | 87.022643 psi |
| 7 bar | 101.526416 psi |
| 8 bar | 116.03019 psi |
| 9 bar | 130.533964 psi |
| 10 bar | 145.037738 psi |
| 12 bar | 174.045285 psi |
| 15 bar | 217.556607 psi |
| 20 bar | 290.075475 psi |
| 25 bar | 362.594344 psi |
| 50 bar | 725.188689 psi |
| 100 bar | 1,450.377377 psi |
| 200 bar | 2,900.754755 psi |
| 300 bar | 4,351.132132 psi |
| 500 bar | 7,251.886887 psi |
| 1000 bar | 14,503.773773 psi |
| 2000 bar | 29,007.547546 psi |
| 5000 bar | 72,518.868865 psi |
| 10000 bar | 145,037.73773 psi |
What is a bar?
Exactly 100,000 pascals by definition, chosen because it sits within a per cent of atmospheric pressure at sea level. European tyre placards and dive computers use it.
What is a pound per square inch?
A pound-force spread over a square inch. Exact, because both parts are: it is 4.4482216152605 newtons divided by an inch squared. Every US tyre gauge, air line and pressure washer is marked in it.
How many pounds per square inch are in a bar?
One bar is 14.503774 pounds per square inch. Going the other way, one pound per square inch is 0.068947573 bars. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every pressure unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Pounds per square inch | psi | 6894.7573 pascal |
| Bars | bar | 100000 pascal |
| Pascals | Pa | the base unit |
| Kilopascals | kPa | 1000 pascal |
| Megapascals | MPa | 1000000 pascal |
| Atmospheres | atm | 101325 pascal |
| Torr | Torr | 133.32237 pascal |
| Inches of mercury | inHg | 3386.389 pascal |
Questions people actually ask
- How many pounds per square inch are in a bar?
- 14.503774. A pound-force spread over a square inch. Exact, because both parts are: it is 4.4482216152605 newtons divided by an inch squared. Every US tyre gauge, air line and pressure washer is marked in it.
- How do I convert pounds per square inch back to bars?
- Divide by 14.503774, or multiply by 0.068947573 — they are the same operation.
Other pressure conversions
Pounds per square inch to bars — the same conversion the other way.