Why Convert Atmospheres to Pascals?
Converting between atmospheres (atm) and pascals (Pa) is one of the most common pressure conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert atm to Pa saves time and prevents errors.
Pressure conversions between atm and Pa 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 Atmospheres to Pascals
To convert atmospheres to pascals, use the following formula:
Pa = atm × 101325
Example: 1 atm = 101325 Pa
For example, 5 atm = 506625 Pa, 10 atm = 1013250 Pa, and 100 atm = 10132500 Pa. Our calculator above performs this conversion instantly with full precision — no rounding errors.
Common Use Cases
- Standard atmospheric pressure at sea level: 1 atm = 101325 Pa
- Pressure at 10 m underwater depth: 2 atm = 202650 Pa
- Atmospheric pressure at ~5500 m altitude: 0.5 atm = 50662.5 Pa
- Pressure at 30 m underwater (recreational diving limit): 4 atm = 405300 Pa
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 atm = 101325 Pa. For quick mental math, remember this base conversion.
- Quick reference: 5 atm = 506625 Pa · 10 atm = 1013250 Pa · 25 atm = 2533125 Pa · 50 atm = 5066250 Pa · 100 atm = 10132500 Pa
- Bookmark this page: Save this converter for instant access. It works offline once loaded — no internet needed.
Atmospheres to Pascals Conversion Table
| atm | Pa |
|---|---|
| 0.01 atm | 1013.25 Pa |
| 0.1 atm | 10132.5 Pa |
| 0.5 atm | 50662.5 Pa |
| 1 atm | 101325 Pa |
| 2 atm | 202650 Pa |
| 5 atm | 506625 Pa |
| 10 atm | 1013250 Pa |
| 20 atm | 2026500 Pa |
| 50 atm | 5066250 Pa |
| 100 atm | 10132500 Pa |
| 500 atm | 50662500 Pa |
| 1000 atm | 101325000 Pa |
All values in this table are mathematically exact per NIST SP 811.