Pascal to Bar Converter
This free pressure converter changes pascals (Pa) into bar and back again. The pascal is the SI unit of pressure (one newton per square metre), but it is a small unit, so the bar — equal to 100,000 Pa — is often more convenient for everyday and industrial pressures like tyres, pumps and weather systems.
When you need this conversion
The pascal is the official SI unit, so most physics and engineering calculations produce results in Pa. But practical engineering tools — pressure gauges, pump specs, tyre charts, HVAC datasheets, diving tables — often display pressures in bar because the numbers are more human-friendly. A car tyre at 200,000 Pa is awkward; the same pressure as 2 bar is immediately legible on a gauge.
Common situations where the Pa-to-bar conversion comes up:
- Reading sensor output in pascals from a datasheet, then converting for a gauge with a bar scale
- Converting simulation or CFD results (often in Pa) to check against physical test equipment
- Weather data in Pa or hPa converted to bar for comparison with barometric instruments
- Checking hydraulic or pneumatic system pressures against component ratings quoted in bar
How it works
The conversion uses one exact relationship:
bar = pascals ÷ 100000
pascals = bar × 100000Type a value in either field and the other updates in real time. Because the factor is exact, no rounding error is introduced beyond display formatting.
Quick reference table
| Pressure (Pa) | Bar | Typical context |
|---|---|---|
| 1,000 Pa | 0.01 bar | Very slight differential pressure |
| 10,000 Pa | 0.1 bar | Low HVAC duct pressure |
| 100,000 Pa | 1 bar | Approximately atmospheric pressure at sea level |
| 101,325 Pa | 1.013 bar | Exact standard atmosphere (1 atm) |
| 200,000–250,000 Pa | 2–2.5 bar | Typical car tyre pressure |
| 800,000 Pa | 8 bar | Espresso machine brew pressure |
| 1,000,000 Pa (1 MPa) | 10 bar | Light hydraulic systems |
Bar versus related units
- 1 bar = 100 kPa — kPa is widely used in tyre pressure in metric countries (e.g. Canada, Australia recommend 220–260 kPa for car tyres).
- 1 bar ≈ 14.5 psi — bar and psi are both common in industrial and automotive contexts in different parts of the world.
- 1 bar ≈ 0.987 atm — standard atmosphere (atm) is close to but not the same as 1 bar; 1 atm = 101,325 Pa = 1.01325 bar.
- 1 bar = 1000 hPa = 1000 mbar — hPa (hectopascals) is the standard unit in meteorology; sea-level atmospheric pressure is typically around 1013 hPa.
All calculations run entirely in your browser with no data sent to any server.