Standard atmosphere to Psi Converter
Enter the value that you want to convert Standard atmosphere (atm) to psi or psi to Standard atmosphere.
1 Standard atmosphere = 14.6959488 psi
Formula: psi = Standard atmosphere value × 14.6959488
Standard atmosphere to psi
10 Standard atmosphere = 146.95949 psi
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Converting Standard atmosphere to Psi
About the Standard atmosphere
Standard atmosphere (atm) is a unit of pressure measurement. 1 Standard atmosphere is equal to 14.6959488 psi.
What is Psi?
Psi (psi) is a unit of pressure measurement. 1 psi is equal to 0.0680460 Standard atmosphere.
Pressure Units Across Industries
Pressure measurements vary dramatically by industry. Meteorologists report in millibars or hectopascals, tire shops use PSI, scuba divers think in atmospheres or bar, vacuum engineers work in torr, and hydraulic systems specify in megapascals. A single industrial plant might encounter all these units across different equipment manuals, safety datasheets, and regulatory standards from different countries.
Standard atmosphere to psi metric conversion table
| 0.01 atm | = | 0.14696 psi |
| 0.1 atm | = | 1.46959 psi |
| 1 atm | = | 14.69595 psi |
| 2 atm | = | 29.39190 psi |
| 3 atm | = | 44.08785 psi |
| 4 atm | = | 58.78380 psi |
| 5 atm | = | 73.47974 psi |
| 6 atm | = | 88.17569 psi |
| 7 atm | = | 102.87164 psi |
| 8 atm | = | 117.56759 psi |
| 9 atm | = | 132.26354 psi |
| 10 atm | = | 146.95949 psi |
| 11 atm | = | 161.65544 psi |
| 12 atm | = | 176.35139 psi |
| 13 atm | = | 191.04733 psi |
| 14 atm | = | 205.74328 psi |
| 15 atm | = | 220.43923 psi |
| 16 atm | = | 235.13518 psi |
| 17 atm | = | 249.83113 psi |
| 18 atm | = | 264.52708 psi |
| 19 atm | = | 279.22303 psi |
| 20 atm | = | 293.91898 psi |
| 30 atm | = | 440.87846 psi |
| 40 atm | = | 587.83795 psi |
| 50 atm | = | 734.79744 psi |
| 60 atm | = | 881.75693 psi |
| 70 atm | = | 1028.71641 psi |
| 80 atm | = | 1175.67590 psi |
| 90 atm | = | 1322.63539 psi |
| 100 atm | = | 1469.59488 psi |
| 200 atm | = | 2939.18976 psi |
| 300 atm | = | 4408.78463 psi |
| 400 atm | = | 5878.37951 psi |
| 500 atm | = | 7347.97439 psi |
| 600 atm | = | 8817.56927 psi |
| 700 atm | = | 10287.16414 psi |
| 800 atm | = | 11756.75902 psi |
| 900 atm | = | 13226.35390 psi |
| 1000 atm | = | 14695.94878 psi |
How to Convert Standard atmosphere to Psi?
We can convert Standard atmosphere to psi by using an example.
Example:
Convert 20 Standard atmosphere to Psi?
We know 1 Standard atmosphere = 14.6959488 psi; 1 Psi = 0.0680460 Standard atmosphere.
20 Standard atmosphere = ___psi
20 × 14.6959488 = 293.91898 psi (we know 1 Standard atmosphere = 14.6959488 psi)
Answer:
20 Standard atmosphere = 293.91898 psi
How to Convert Atmospheres to PSI (Step-by-Step)
Converting atmospheres to PSI is needed when translating chemistry or diving pressure values to US gauge readings. The conversion factor is 1 atm = 14.696 PSI.
- Write down the pressure value in atmospheres (atm).
- Multiply the atm value by 14.696.
- The result is the equivalent pressure in PSI.
- For quick estimation, multiply by 15 (overshoots by ~2%).
Common Atmosphere to PSI Conversions
Reference values bridging chemistry/diving atmospheres to US pressure gauge readings.
| Standard atmosphere | Psi |
|---|---|
| 1 atm | 14.696 PSI |
| 2 atm | 29.392 PSI |
| 3 atm | 44.088 PSI |
| 4 atm | 58.784 PSI |
| 5 atm | 73.480 PSI |
| 10 atm | 146.96 PSI |
| 200 atm | 2939.2 PSI |
| 300 atm | 4408.8 PSI |
Solved Examples: Atmospheres to PSI
Question 1: A dive computer shows ambient pressure equivalent to 4 atm at 30 m depth. What would a PSI gauge read?
Solution:
Pressure in PSI = Pressure in atm × 14.696
= 4 × 14.696
= 58.784 PSI
Answer: 4 atm = 58.78 PSI (absolute). The gauge would show ~44 PSIG (subtracting atmospheric).
Question 2: A chemistry experiment requires 1.5 atm pressure in a sealed vessel. What PSI setting on the regulator?
Solution:
Pressure in PSI = 1.5 × 14.696
= 22.044 PSI
Answer: 1.5 atm = 22.04 PSI absolute, or ~7.35 PSIG (gauge pressure above atmospheric).
Question 3: An autoclave operates at 2.0 atm gauge pressure. What does the PSI gauge read?
Solution:
Gauge pressure in PSI = 2.0 × 14.696
= 29.39 PSIG
Answer: 2.0 atm (gauge) = 29.4 PSIG — typical for surgical instrument sterilization.
Practice Questions: Atmospheres to PSI
Try solving these on your own to test your understanding:
- Convert 6 atm to PSI. (Answer: 88.18 PSI)
- A reaction requires 0.75 atm. Express in PSI. (Answer: 11.02 PSI)
- Convert 150 atm (gas cylinder) to PSI. (Answer: 2204.4 PSI)
- A hyperbaric chamber at 2.8 atm absolute. Express in PSI. (Answer: 41.15 PSI)
- Convert 50 atm to PSI. (Answer: 734.8 PSI)
Gauge Pressure vs Absolute Pressure: PSIG vs PSIA
US pressure gauges read zero at atmospheric pressure (gauge pressure, PSIG). Absolute pressure (PSIA) includes atmospheric: PSIA = PSIG + 14.696. When converting atm to PSI, determine whether the atm value is absolute or gauge. In chemistry, "2 atm" usually means absolute (= 29.39 PSIA = 14.70 PSIG). In diving, "4 atm absolute" at 30 m means the gauge shows 44.09 PSIG. This distinction prevents dangerous errors in pressure vessel operations.
Dive Cylinder Pressure in US Practice
US-trained divers think in PSI while international standards use bar or atm. A standard aluminum 80 tank fills to ~3000 PSI (204 atm). The "rule of thirds" says turn back at 2000 PSI (136 atm), keeping 1000 PSI (68 atm) reserve. US dive shops, fill stations, and PADI materials use PSI exclusively, while NAUI and SSI international materials use bar. Converting between these requires the 14.696 factor for atm or 14.504 for bar.
Key Takeaways
- Multiply atm by 14.696 to get PSI.
- 1 atm = 14.696 PSI (standard sea-level pressure).
- Quick estimate: atm × 15 ≈ PSI (overshoots by ~2%).
- Distinguish PSIG (gauge) from PSIA (absolute): PSIA = PSIG + 14.7.
- SCUBA: 200 atm ≈ 2939 PSI (full tank).
- Chemistry "1 atm" is absolute = 14.7 PSIA = 0 PSIG.
Standard atmosphere to Psi Conversion Formula
psi = Standard atmosphere × 14.6959488
1 Standard atmosphere = 14.6959488 psi
1 psi = 0.0680460 Standard atmosphere
Reverse: Standard atmosphere = psi × 0.0680460
Frequently Asked Questions
How many psi are in 1 Standard atmosphere?
There are 14.6959488 psi in 1 Standard atmosphere. To convert Standard atmosphere to psi, multiply the value by 14.6959488.
How do I convert Standard atmosphere to psi?
Multiply your Standard atmosphere value by 14.6959488 to get the equivalent in psi. For example, 5 Standard atmosphere = 5 × 14.6959488 = 73.47974 psi.
How do I convert psi to Standard atmosphere?
Multiply your psi value by 0.0680460 to get the equivalent in Standard atmosphere. Alternatively, divide by 14.6959488.
What is 10 Standard atmosphere in psi?
10 Standard atmosphere is equal to 146.95949 psi.
What is 100 Standard atmosphere in psi?
100 Standard atmosphere is equal to 1469.59488 psi.