Bars to Standard Atmospheres Converter
1 bar ≈ 0.986923267 standard atmospheres
1 bar equals 0.986923 standard atmospheres
How to convert bars to standard atmospheres
Unit conversion preserves the pressure reference. Gauge pressure and absolute pressure are different readings; changing between them also needs the ambient pressure. Mercury and water-column units use the conventions stated in their unit notes.
atm = bar × 0.9869232667One bar is 0.9869232667 standard atmospheres, so a single multiplication converts any value.
9.86923 atm ≈ 10 × 0.9869232667Bars to standard atmospheres conversion table
Common values in bars, converted to standard atmospheres.
| Bars (bar) | Standard atmospheres (atm) |
|---|---|
| 1 | 0.98692327 |
| 2 | 1.9738465 |
| 3 | 2.9607698 |
| 4 | 3.9476931 |
| 5 | 4.9346163 |
| 10 | 9.8692327 |
| 20 | 19.738465 |
| 25 | 24.673082 |
| 50 | 49.346163 |
| 100 | 98.692327 |
| 250 | 246.73082 |
| 500 | 493.46163 |
| 1,000 | 986.92327 |
About these units
barbar
Exactly 100,000 pascals, close to average atmospheric pressure at sea level.
standard atmosphereatm
Exactly 101,325 pascals, the defined standard sea-level pressure.
Reference: CGPM 1954.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.