Pounds-force per square inch to bars (psi to bar)
Convert pounds-force per square inch to bars. For pressure, 1 psi equals 0.06894757293 bar.
Converter
psi to bar conversion table
| Pounds-force per square inch | Bars |
|---|---|
| 1 psi | 0.068947573 bar |
| 2 psi | 0.13789515 bar |
| 5 psi | 0.34473786 bar |
| 10 psi | 0.68947573 bar |
| 25 psi | 1.7236893 bar |
| 50 psi | 3.4473786 bar |
| 100 psi | 6.8947573 bar |
| 1000 psi | 68.947573 bar |
Formula
bar = psi × 0.06894757293
Worked example
25 psi × 0.06894757293 = 1.723689323 bar
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 psi to bar = 0.0689476 bar
- 5 psi to bar = 0.344738 bar
- 100 psi to bar = 6.89476 bar
- 32 psi to bar = 2.20632 bar
- 1 bar to psi = 14.5038 psi
- 2 bar to psi = 29.0075 psi
About pounds-force per square inch and bars
Pound-force per square inch (psi)
Pound-force per square inch is about 6,894.757 pascals. It is used for tire pressure and hydraulic and pneumatic systems in the US.
Bar (bar)
A bar is exactly 100,000 pascals, close to atmospheric pressure. It is used for tire pressure, scuba diving and industrial gauges.
Both are units of pressure; the base unit used internally is Pa.
Notes
- Standard atmosphere = 101,325 Pa; bar = 100,000 Pa; psi = pound-force per square inch using standard gravity (≈ 6894.757 Pa).
- mmHg is the conventional millimeter of mercury (133.322387415 Pa) and the torr is exactly 1/760 of a standard atmosphere (≈ 133.3224 Pa); the two differ by about 0.000014 %.
- Absolute and gauge pressure are not distinguished: no gauge offset is applied. Negative values are accepted so that gauge vacuum readings can be converted.
psi to bar FAQs
How do I convert pounds-force per square inch to bars?
Multiply the number of pounds-force per square inch by 0.06894757293 to get bars. For example, 25 psi × 0.06894757293 = 1.72369 bar.
How many bars are in one pound-force per square inch?
1 psi = 0.06894757293 bar and 1 bar = 14.50377377 psi. To go the other way, use the bars to pounds-force per square inch converter.
How many bars are in 35 pounds-force per square inch?
35 psi = 2.41317 bar, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many bars are in 100 pounds-force per square inch?
100 psi = 6.89476 bar, rounded to 6 significant digits.
Is the psi to bar conversion exact?
The ratio is exact by definition, but its decimal form does not end (0.0689475729317… to 12 significant digits). The converter keeps full precision internally and rounds only the displayed answer, which you can set from 4 to 12 significant digits.
What is the difference between pounds-force per square inch and bars?
Pound-force per square inch is about 6,894.757 pascals. It is used for tire pressure and hydraulic and pneumatic systems in the US. A bar is exactly 100,000 pascals, close to atmospheric pressure. It is used for tire pressure, scuba diving and industrial gauges.
Does this handle gauge pressure (psig) or absolute pressure (psia)?
The converter changes units only and does not add or remove atmospheric pressure. A reading of 30 psi is 2.06843 bar in whichever reference (gauge or absolute) it was measured; to move between gauge and absolute, add or subtract about 1.01325 bar (one standard atmosphere) yourself.
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