Why Convert Pascals to Atmospheres?
Converting between pascals (Pa) and atmospheres (atm) is one of the most common pressure conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert Pa to atm saves time and prevents errors.
Pressure conversions between Pa and atm are critical in automotive maintenance, meteorology, and diving. Tire pressure recommendations differ by region — European cars typically specify bar while US vehicles use PSI. Weather services report atmospheric pressure in different units: hPa/mbar in most countries, mmHg (inHg) in the US. Scuba divers must understand ATM conversions to calculate safe diving depths and decompression schedules.
How to Convert Pascals to Atmospheres
To convert pascals to atmospheres, use the following formula:
atm = Pa × 0.000009869232667
Example: 1 Pa = 0.000009869232667 atm
For example, 5 Pa = 0.00004934616334 atm, 10 Pa = 0.00009869232667 atm, and 100 Pa = 0.0009869232667 atm. Our calculator above performs this conversion instantly with full precision — no rounding errors.
Common Use Cases
- Standard atmospheric pressure at sea level: 101325 Pa = 1 atm
- Typical pressure in a car tire (absolute): 200000 Pa = 1.973846533 atm
- Atmospheric pressure at ~5500 m altitude: 50000 Pa = 0.4934616334 atm
- Pressure at 100 m underwater depth: 1013250 Pa = 10 atm
Common Mistakes to Avoid
- Gauge vs absolute: Tire pressure gauges read relative to atmospheric pressure (gauge pressure). Add 1 atm (~14.7 psi) to get absolute pressure.
- Bar vs ATM confusion: 1 bar ≈ 0.987 atm — they're close but not equal. For precise work, don't interchange them.
- Unit proliferation: Pressure has many units (Pa, bar, psi, atm, mmHg, torr). Always confirm which unit your equipment uses.
Pro Tips
- Memorize the factor: 1 Pa = 0.000009869232667 atm. For quick mental math, remember this base conversion.
- Quick reference: 5 Pa = 0.00004934616334 atm · 10 Pa = 0.00009869232667 atm · 25 Pa = 0.0002467308167 atm · 50 Pa = 0.0004934616334 atm · 100 Pa = 0.0009869232667 atm
- Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.
Pascals to Atmospheres Conversion Table
| Pa | atm |
|---|---|
| 0.01 Pa | 9.869232667e-8 atm |
| 0.1 Pa | 9.869232667e-7 atm |
| 0.5 Pa | 0.000004934616334 atm |
| 1 Pa | 0.000009869232667 atm |
| 2 Pa | 0.00001973846533 atm |
| 5 Pa | 0.00004934616334 atm |
| 10 Pa | 0.00009869232667 atm |
| 20 Pa | 0.0001973846533 atm |
| 50 Pa | 0.0004934616334 atm |
| 100 Pa | 0.0009869232667 atm |
| 500 Pa | 0.004934616334 atm |
| 1000 Pa | 0.009869232667 atm |
All values in this table are mathematically exact per NIST SP 811.