Pascals to Bar Converter
Common Conversions
| Pa | bar |
|---|---|
| 100 | 0.001 |
| 1000 | 0.01 |
| 10000 | 0.1 |
| 50000 | 0.5 |
| 100000 | 1 |
| 101325 | 1.01325 |
| 200000 | 2 |
| 500000 | 5 |
| 1000000 | 10 |
| 5000000 | 50 |
| 10000000 | 100 |
Why this conversion matters in chemistry
The pascal is the SI base for pressure; the bar is what IUPAC chose as the reference pressure for standard-state thermodynamic tables back in 1982. The factor between them is exactly 10⁵ — 1 bar is 100,000 Pa by construction. Vacuum-system datasheets quote ultimate pressures in pascals (turbo pumps reach 10⁻⁷ Pa or below), but the lab summary often translates back into bar. A turbopump base pressure of 5 × 10⁻⁷ Pa is 5 × 10⁻¹² bar — the kind of figure that confirms residual-gas contamination is below the threshold for ion-source stability in a mass-spec setup.
Formula
Worked Examples
The defining identity — exactly 10⁵ Pa per bar by construction.
One standard atmosphere expressed in bar — slightly above the IUPAC reference, by exactly 1.3%.
Half a bar — a moderate reduced pressure for vacuum-distillation work on a high-boiling solvent.
About the elevated pressure inside a small autoclave during a sterilization or hydrothermal-synthesis run.