Pressure / psi → bar
Convert Pounds-force per square inch to Bars
Convert pressure differences or absolute pressures between consistent units. Convert Pounds-force per square inch (psi) to Bars (bar). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Bars to Pounds-force per square inch →
How to convert pounds-force per square inch to bars
This changes units only. Gauge and absolute pressures need a known ambient pressure to relate them; the converter does not add atmospheric pressure.
Use x for the value in psi, b for the intermediate value in Pa, and y for the result in bar.
bar = psi × 6894.757293168361 ÷ 100000
Worked examples
10 psi ≈ 0.689475729317 bar
Step 1: (10 × 6894.75729317) ≈ 68947.5729317 Pa.
Step 2: 68947.5729317 ÷ 100000 ≈ 0.689475729317 bar.20 psi ≈ 1.37895145863 bar
Step 1: (20 × 6894.75729317) ≈ 137895.145863 Pa.
Step 2: 137895.145863 ÷ 100000 ≈ 1.37895145863 bar.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Pounds-force per square inch
Pounds-force per square inch (psi) measures pressure under the conventions above. The base value in Pa is (x × 6894.75729317), where x is the numerical value in psi. Factors shown here are rounded for display; calculations use the stored factor.
About Bars
Bars (bar) measures pressure under the conventions above. The base value in Pa is (x × 100000), where x is the numerical value in bar. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Pounds-force per square inch to bars reference table
| Pounds-force per square inch (psi) | Bars (bar) |
|---|---|
| 1 | 0.0689475729317 |
| 5 | 0.344737864658 |
| 10 | 0.689475729317 |
| 25 | 1.72368932329 |
| 50 | 3.44737864658 |
| 100 | 6.89475729317 |
| 1000 | 68.9475729317 |
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