Atmosphere to PSI Converter (atm to psi)
1 atmosphere equals 14.695949 psi — multiply the number of atmospheres by 14.695949 to convert. That is why sea-level pressure is often rounded to about 14.7 psi.
The formula
To convert atmospheres to psi, multiply by 14.695949:
psi = atm × 14.695949
For example, 10 atm × 14.695949 = 146.95949 psi. To reverse it, divide by 14.695949 (or multiply by 0.06804596).
Conversion table
| Atmospheres (atm) | PSI |
|---|---|
| 1 | 14.695949 |
| 2 | 29.391898 |
| 3 | 44.087847 |
| 5 | 73.479745 |
| 10 | 146.95949 |
| 25 | 367.398725 |
| 50 | 734.79745 |
| 100 | 1469.5949 |
| 500 | 7347.9745 |
| 1000 | 14695.949 |
How to convert online
- Type the number of atmospheres into the first box.
- Read the psi value instantly in the second box.
- Enter a psi value to convert back to atmospheres — it works both ways.
Use the Atmosphere to PSI Converter — free and instant in your browser.
Where this conversion is used
PSI (pounds per square inch) is the everyday pressure unit in the US for tyres, compressors, HVAC and hydraulics, while atmospheres describe ambient and gas pressures. Converting is common when reading a US gauge against a spec quoted in atmospheres, or sizing pumps and cylinders.
FAQ
How many psi are in an atmosphere?
One atmosphere equals 14.695949 psi, often rounded to 14.7 psi. So 2 atm is 29.391898 psi.
How do I convert psi back to atmospheres?
Divide by 14.695949, or multiply by 0.06804596. So 14.7 psi is about 1 atm.
Is the conversion exact?
The factor is shown as 14.695949; it derives from the exact 101,325 Pa atmosphere and is accurate to the displayed precision.
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
- PSI to Atmosphere Converter
- Atmosphere to Pascal Converter
- Atmosphere to Kilopascal Converter
- Atmosphere to Bar Converter
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Recommended reading
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 Pascal Converter (atm to Pa)
1 atmosphere equals 101,325 pascals. Use the exact factor, formula and reference table to convert atm to Pa 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.
Atmosphere to Bar Converter (atm to bar)
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