atm to Pa Converter
Type a value in standard atmospheres to see it in pascals as you type, with the exact formula and a reference chart.
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- Atmospheres
- 2.5 atm
How this was calculated
- 1 standard atmosphere = 101,325 pascals
- 2.5 × 101,325 = 253,312.5 Pa
| atm | Pa |
|---|---|
| 0.1 atm | 10,132.5 Pa |
| 0.25 atm | 25,331.3 Pa |
| 0.5 atm | 50,662.5 Pa |
| 1 atm | 101,325 Pa |
| 1.5 atm | 151,988 Pa |
| 2 atm | 202,650 Pa |
| 2.5 atm | 253,313 Pa |
| 3 atm | 303,975 Pa |
| 4 atm | 405,300 Pa |
| 5 atm | 506,625 Pa |
| 10 atm | 1,013,250 Pa |
| 20 atm | 2,026,500 Pa |
| 50 atm | 5,066,250 Pa |
| 100 atm | 10,132,500 Pa |
| Pa | atm |
|---|---|
| 10,000 Pa | 0.0986923 atm |
| 20,000 Pa | 0.197385 atm |
| 50,000 Pa | 0.493462 atm |
| 100,000 Pa | 0.986923 atm |
| 200,000 Pa | 1.97385 atm |
| 500,000 Pa | 4.93462 atm |
| 1,000,000 Pa | 9.86923 atm |
| 2,000,000 Pa | 19.7385 atm |
| 5,000,000 Pa | 49.3462 atm |
| 10,000,000 Pa | 98.6923 atm |
| 20,000,000 Pa | 197.385 atm |
How to convert standard atmospheres to pascals
1 standard atmosphere = 101,325 pascals. To convert standard atmospheres to pascals, multiply by 101,325. One standard atmosphere is exactly 101,325 pascals (101.325 kPa), roughly the air pressure at sea level. The pascal is the SI unit of pressure, one newton per square meter.
Worked examples
- 1 standard atmosphere = 101,325 Pa (1 × 101,325)
- 2.5 standard atmospheres = 253,313 Pa (2.5 × 101,325)
- 10 standard atmospheres = 1,013,250 Pa (10 × 101,325)
Where this conversion comes up
Standard atmospheres are used for chemistry, gas laws and diving; pascals for physics and sound pressure. One standard atmosphere is defined as exactly 101,325 pascals, so the conversion is a plain multiplication with no rounding. It comes up in chemistry and physics problems, gas-law calculations (PV = nRT) and diving depth tables.
Quick estimate
Multiply by 100,000 for a rough answer (1.3% low), or by 101,325 for the exact one.
Common mistakes
- Dividing instead of multiplying. A pascal is smaller than a standard atmosphere, so the number of pascals must come out larger: 1 standard atmosphere = 101,325 Pa.
Related pressure converters: bar to psi, psi to bar, kpa to psi, psi to kpa, mpa to psi, psi to mpa.
Frequently asked questions
How do you convert standard atmospheres to pascals?
Multiply the standard atmospheres by 101,325. For example, 2.5 standard atmospheres is 253,313 pascals.
How many pascals are in one standard atmosphere?
One standard atmosphere is 101,325 pascals. One standard atmosphere is exactly 101,325 pascals (101.325 kPa), roughly the air pressure at sea level.
What is 10 standard atmospheres in pascals?
10 standard atmospheres is 1,013,250 pascals.
Is there a quick way to estimate standard atmospheres to pascals?
Multiply by 100,000 for a rough answer (1.3% low), or by 101,325 for the exact one.