Convert Pounds per square inch to Bars
1 pound per square inch is 0.068948 bar. One pound per square inch is exactly 0.0689475729317 bars.
One pound per square inch is 0.068947573 bars. To convert pounds per square inch to bars, multiply by 0.068947573; to go the other way, divide by 0.068947573 or multiply by 14.503774. The factor is exact rather than rounded: it follows from NIST Special Publication 811. A pound-force spread over a square inch.
Factor checked against the defining standard · How we check
- Pounds per square inch × 0.068947573
value * 0.06894757293170.069 bar
1 pound per square inch in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch (as entered) | 1 psi | — |
| bars | 0.06894757293 bar | × 0.0689475729317 |
| pascals | 6,894.757293 Pa | × 6,894.75729317 |
| kilopascals | 6.894757293 kPa | × 6.89475729317 |
| megapascals | 0.006894757293 MPa | × 0.00689475729317 |
| atmospheres | 0.06804596391 atm | × 0.0680459639099 |
| torr | 51.71493257 Torr | × 51.7149325715 |
| inches of mercury | 2.036020461 inHg | × 2.03602046108 |
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 pounds per square inch to bars?
- 1.Take the measurement in pounds per square inch.
- 2.Multiply by 0.068947573 — that is how many bars fit in one pound per square inch.
- 3.To go back the other way, divide by 0.068947573, or multiply by 14.503774.
Worked example: 25 pounds per square inch to bars
- Formula
- psi × 0.068947573 = bar
- Arithmetic
- 25 × 0.068947573 = 1.723689 bar
- Answer
- 25 psi = 1.723689 bar
The factor is rounded for display; the figure above is computed from the full value.
Pounds per square inch to bars conversion table
| Pounds per square inch | Bars |
|---|---|
| 1 psi | 0.068948 bar |
| 2 psi | 0.137895 bar |
| 3 psi | 0.206843 bar |
| 4 psi | 0.27579 bar |
| 5 psi | 0.344738 bar |
| 6 psi | 0.413685 bar |
| 7 psi | 0.482633 bar |
| 8 psi | 0.551581 bar |
| 9 psi | 0.620528 bar |
| 10 psi | 0.689476 bar |
| 12 psi | 0.827371 bar |
| 15 psi | 1.034214 bar |
| 20 psi | 1.378951 bar |
| 25 psi | 1.723689 bar |
| 50 psi | 3.447379 bar |
| 100 psi | 6.894757 bar |
| 200 psi | 13.789515 bar |
| 300 psi | 20.684272 bar |
| 500 psi | 34.473786 bar |
| 1000 psi | 68.947573 bar |
| 2000 psi | 137.895146 bar |
| 5000 psi | 344.737865 bar |
| 10000 psi | 689.475729 bar |
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.
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.
How many bars are in a pound per square inch?
One pound per square inch is 0.068947573 bars. Going the other way, one bar is 14.503774 pounds per square inch. 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 bars are in a pound per square inch?
- 0.068947573. 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.
- How do I convert bars back to pounds per square inch?
- Divide by 0.068947573, or multiply by 14.503774 — they are the same operation.
Other pressure conversions
Bars to pounds per square inch — the same conversion the other way.