Atmospheres (atm) to Pascals (Pa) Conversion
Atmospheres
The standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 Pa, representing the approximate mean atmospheric pressure at sea level. It remains in use in chemistry for expressing gas pressures in thermodynamic tables and standard conditions (STP: 0 °C and 1 atm). One atmosphere supports a mercury column of exactly 760 mm — the basis of the mercury barometer invented by Torricelli in 1643. In deep-sea diving, pressure is expressed in atmospheres absolute (ATA).
Pascals
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre (N/m²), named after French mathematician Blaise Pascal who studied fluid pressure in the 17th century. Standard atmospheric pressure at sea level is 101,325 Pa (101.3 kPa). The pascal is a small unit for everyday use — a gentle breeze exerts approximately 1 Pa of dynamic pressure — so kilopascals (kPa) and megapascals (MPa) are more common in practical engineering contexts.
| Atmospheres (atm) | Pascals (Pa) |
|---|---|
| 0.1 atm | 10132.5 Pa |
| 1 atm | 101325 Pa |
| 2 atm | 202650 Pa |
| 3 atm | 303975 Pa |
| 5 atm | 506625 Pa |
| 10 atm | 1013250 Pa |
| 20 atm | 2026500 Pa |
| 30 atm | 3039750 Pa |
| 50 atm | 5066250 Pa |
| 100 atm | 10132500 Pa |
| 1000 atm | 101325000 Pa |
Frequently Asked Questions (FAQ)
How many pascals are in 1 atmospheres?
1 atmospheres (atm) is exactly 101,325 pascals (Pa).
How do I convert atmospheres to pascals?
Multiply the value in atmospheres by 101,325 to get the result in pascals. Or use the converter above — type any number and see the result instantly.