Pneumatic System Calculator

Size a pneumatic compressed air system. Calculate total CFM demand, compressor horsepower, and tank recharge time for multiple air tools.

Air Consumption per Tool

CFM

System Pressure

psi

Number of Tools

Duty Cycle

Storage Tank Size

gal

Tab to move between fields

Total CFM Required

15 CFM

Compressor Size

4 HP

Compressor CFM Rating18.8 CFM

Tank Recharge Time0.9 min

System Capacity Factor294.1

How to Use This Calculator

Enter the Air Consumption per Tool in CFM from each tool's specification sheet — impact wrench ≈ 5–10 CFM, spray gun ≈ 8–12 CFM.
Enter the System Pressure in psi required at the tool. Most air tools need 90 psi.
Enter the Number of Tools that may run simultaneously.
Set the Duty Cycle as a percentage — intermittent use ≈ 25–50%, continuous production ≈ 75–100%.
Enter the Storage Tank Size in gallons — rule of thumb is 3–5 gallons per CFM of compressor output.
Review Total CFM Required and Compressor Size in HP to select a compressor model, then check Tank Recharge Time to ensure adequate pressure recovery between demand peaks.

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