Atmosphere to Pascal Converter (atm to Pa)
1 atmosphere equals 101,325 pascals — multiply the number of atmospheres by 101,325 to convert. This is the exact SI definition of the standard atmosphere in pascals, the base unit of pressure.
The formula
To convert atmospheres to pascals, multiply by 101,325:
Pa = atm × 101325
For example, 10 atm × 101325 = 1,013,250 Pa. To reverse it, divide by 101,325.
Conversion table
| Atmospheres (atm) | Pascals (Pa) |
|---|---|
| 1 | 101,325 |
| 2 | 202,650 |
| 3 | 303,975 |
| 5 | 506,625 |
| 10 | 1,013,250 |
| 25 | 2,533,125 |
| 50 | 5,066,250 |
| 100 | 10,132,500 |
| 500 | 50,662,500 |
| 1000 | 101,325,000 |
How to convert online
- Type the number of atmospheres into the first box.
- Read the pascal value instantly in the second box.
- Enter a Pa value to convert back to atmospheres — it works both ways.
Use the Atmosphere to Pascal Converter — free and instant in your browser.
Where this conversion is used
The pascal is the SI base unit for pressure and appears throughout physics, engineering and scientific instruments. Converting atmospheres to pascals is essential when plugging real-world pressures into equations, calibrating sensors, or reporting results in strict SI units.
FAQ
How many pascals are in an atmosphere?
Exactly 101,325 Pa. So 2 atm is 202,650 Pa and 100 atm is 10,132,500 Pa.
How do I convert pascals back to atmospheres?
Divide by 101,325. So 101,325 Pa is exactly 1 atm.
Is the conversion exact?
Yes. The standard atmosphere is defined as exactly 101,325 pascals, so there is no rounding.
Is this converter free and private?
Yes. It runs entirely in your browser — nothing is uploaded or stored. It is free, needs no sign-up and works offline once loaded.
Related converters
- Pascal to Atmosphere Converter
- Atmosphere to Kilopascal Converter
- Atmosphere to Bar Converter
- Atmosphere to PSI Converter
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Recommended reading
Pascals to Atmospheres (Pa to atm) Converter
1 Pa = 9.869233e-6 atm. Multiply pascals by 0.000009869233 to convert pressure, with a formula, a conversion table and worked examples.
Bar to Atmosphere Converter (bar to atm)
1 bar equals 0.98692327 atmospheres. Use the exact factor, formula and reference table to convert bar to atm accurately.
Atmosphere to PSI Converter (atm to psi)
1 atmosphere equals 14.695949 psi. Use the exact factor, formula and reference table to convert atm to psi accurately.
Atmosphere to Kilopascal Converter (atm to kPa)
1 atmosphere equals 101.325 kilopascals. Use the exact factor, formula and reference table to convert atm to kPa accurately.