CFM ↔ PSI Calculator
Result: --
CFM to PSI Formula
The converting CFM (Cubic Feet per Minute) to PSI (Pounds per Square Inch), the formula is:
In this Formula:
- 14.7 is the atmospheric pressure at sea level in PSI.
- Tank Volume is in cubic feet. If provided in gallons, it must be converted using 1 cubic foot = 7.48 gallons.
If the tank volume is in gallons:
PSI to CFM Formula
For converting PSI to CFM, manually the formula is:
If the tank volume is provided in gallons:
CFM to PSI and PSI to CFM Calculation with Real Examples
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CFM to PSI Chart
| CFM | Tank Volume (gallons) | Tank Volume (cubic feet) | Resulting PSI |
|---|---|---|---|
| 1 | 10 | 1.34 | 10.96 |
| 1 | 20 | 2.68 | 5.48 |
| 1 | 30 | 4.01 | 3.67 |
| 1 | 50 | 6.68 | 2.20 |
| 2 | 10 | 1.34 | 21.92 |
| 2 | 20 | 2.68 | 10.96 |
| 2 | 30 | 4.01 | 7.33 |
| 2 | 50 | 6.68 | 4.40 |
| 5 | 10 | 1.34 | 54.80 |
| 5 | 20 | 2.68 | 27.40 |
| 5 | 30 | 4.01 | 18.27 |
| 5 | 50 | 6.68 | 10.96 |
| 10 | 10 | 1.34 | 109.60 |
| 10 | 20 | 2.68 | 54.80 |
| 10 | 30 | 4.01 | 36.53 |
| 10 | 50 | 6.68 | 21.92 |
| 20 | 10 | 1.34 | 219.20 |
| 20 | 20 | 2.68 | 109.60 |
| 20 | 30 | 4.01 | 73.07 |
| 20 | 50 | 6.68 | 43.84 |
How to Use the Chart
- Find the CFM value in the first column.
- Locate the tank volume in gallons in the second column.
- The resulting PSI is in the last column.
FAQ’s
What is the relationship between CFM & PSI?
CFM is used to measure the flow rate of air, But PSI is measure the air pressure. These are related by the volume of the tank & the atmospheric pressure. As the tank volume will increase, the PSI for the same CFM decreases and vice versa.
Does a larger tank volume affect the PSI and CFM connection?
Yes, the large tank volume will reduce the pressure (PSI) for a given airflow (CFM). This is because, for a given flow rate, the pressure decreases as the air disperses over a greater volume.
What tools or equipment rely on CFM and PSI calculations?
➤ Air compressors
➤ HVAC systems
➤ Industrial air-powered machinery
Understanding these values ensures the tools operate efficiently and safely.
How do temperature changes affect CFM and PSI?
Temperature changes can impact both CFM and PSI:
➤ Warmer air expands, which may increase the volume of airflow (CFM) but decrease the pressure (PSI).
➤ Cooler air contracts, reducing the volume (CFM) while increasing the pressure (PSI).
For precise calculations, systems operating in extreme temperatures may require additional adjustments.