Pressure
atmtoPa
Convert standard atmospheres (atm) to pascals (Pa).
Factor1 atm = 101325 Pa
Converter
atm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Pa
Rendered to 6 significant figures.
Formula
Formula
Pa = atm × 101325
Multiply any value in standard atmospheres by 101325 to obtain the value in pascals.
Worked example
Convert 1 atm to Pa.
- 01Start with 1 atm.
- 02Multiply by the conversion factor: 1 × 101325 = 101325 Pa.
Result1 atm = 101325 Pa
Conversion table
| atm | Pa |
|---|---|
| 1 | 1.0133e+5 |
| 2 | 2.0265e+5 |
| 5 | 5.0663e+5 |
| 10 | 1.0133e+6 |
| 20 | 2.0265e+6 |
| 50 | 5.0663e+6 |
| 100 | 1.0133e+7 |
| 200 | 2.0265e+7 |
| 500 | 5.0663e+7 |
| 1000 | 1.0133e+8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from atm to Pa?
1 atm equals 101325 Pa. To convert, multiply the value in standard atmospheres by 101325.
How do I convert 1 atm to Pa?
1 atm = 101325 Pa. For any value, multiply by 101325.
How do I convert Pa back to atm?
Divide by the same factor — or equivalently, multiply by 9.869233e-6. So 1 Pa = 9.86923e-6 atm.
When would I need to convert standard atmosphere to pascal?
Pressure conversions between atm and Pa are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).