Pressure / atm → psi
Convert Standard atmospheres to Pounds-force per square inch
Convert pressure differences or absolute pressures between consistent units. Convert Standard atmospheres (atm) to Pounds-force per square inch (psi). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Pounds-force per square inch to Standard atmospheres →
How to convert standard atmospheres to pounds-force per square inch
This changes units only. Gauge and absolute pressures need a known ambient pressure to relate them; the converter does not add atmospheric pressure.
Use x for the value in atm, b for the intermediate value in Pa, and y for the result in psi.
psi = atm × 101325 ÷ 6894.757293168361
Worked examples
10 atm ≈ 146.959487755 psi
Step 1: (10 × 101325) ≈ 1013250 Pa.
Step 2: 1013250 ÷ 6894.75729317 ≈ 146.959487755 psi.20 atm ≈ 293.91897551 psi
Step 1: (20 × 101325) ≈ 2026500 Pa.
Step 2: 2026500 ÷ 6894.75729317 ≈ 293.91897551 psi.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Standard atmospheres
Standard atmospheres (atm) measures pressure under the conventions above. The base value in Pa is (x × 101325), where x is the numerical value in atm. Factors shown here are rounded for display; calculations use the stored factor.
About Pounds-force per square inch
Pounds-force per square inch (psi) measures pressure under the conventions above. The base value in Pa is (x × 6894.75729317), where x is the numerical value in psi. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Standard atmospheres to pounds-force per square inch reference table
| Standard atmospheres (atm) | Pounds-force per square inch (psi) |
|---|---|
| 1 | 14.6959487755 |
| 5 | 73.4797438776 |
| 10 | 146.959487755 |
| 25 | 367.398719388 |
| 50 | 734.797438776 |
| 100 | 1469.59487755 |
| 1000 | 14695.9487755 |
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