Pressure / bar → atm
Convert Bars to Standard atmospheres
Convert pressure differences or absolute pressures between consistent units. Convert Bars (bar) to Standard atmospheres (atm). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Standard atmospheres to Bars →
How to convert bars to standard atmospheres
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 bar, b for the intermediate value in Pa, and y for the result in atm.
atm = bar × 100000 ÷ 101325
Worked examples
10 bar ≈ 9.86923266716 atm
Step 1: (10 × 100000) ≈ 1000000 Pa.
Step 2: 1000000 ÷ 101325 ≈ 9.86923266716 atm.20 bar ≈ 19.7384653343 atm
Step 1: (20 × 100000) ≈ 2000000 Pa.
Step 2: 2000000 ÷ 101325 ≈ 19.7384653343 atm.
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 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.
About Standard atmospheres
Standard atmospheres (atm) measures pressure under the conventions above. The base value in Pa is (x × 101325), where x is the numerical value in atm. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Bars to standard atmospheres reference table
| Bars (bar) | Standard atmospheres (atm) |
|---|---|
| 1 | 0.986923266716 |
| 5 | 4.93461633358 |
| 10 | 9.86923266716 |
| 25 | 24.6730816679 |
| 50 | 49.3461633358 |
| 100 | 98.6923266716 |
| 1000 | 986.923266716 |
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