Shop Air Compressor Sizing Calculator - CFM, Receiver & Duty-Cycle Prompts
Match compressor CFM and tank capacity to your actual tool usage pattern
Shop compressor calculator that applies local CFM, duty-cycle, receiver, and compressor-type prompts to the tools you enter. Select air-tool rows, adjust CFM, pressure, quantity, simultaneous use, and duty cycle, then review peak demand, average demand, delivered-CFM prompt, and a local receiver-gallon range. The output is an estimate for conversations with the compressor supplier, compressed-air specialist, electrician, safety lead, or owner. It is not an OEM package selection, CAGI data-sheet replacement, ASME pressure-vessel design, OSHA air-receiver compliance check, relief-valve sizing method, pipe/drop/dryer/filter design, noise exposure assessment, LOTO procedure, or approval to buy, install, modify, or operate a compressed-air system.
Check leak load before changing the compressor package
Air Compressor Leak Calculator →Check whether a circuit deserves electrical review before compressor startup assumptions
Can I Run This on That? →Check shop power assumptions for compressors, tools, and lighting before electrical review
Machine Shop Power Calculator →Review broader compressed-air prompts for piping, dryers, regulators, storage, and energy
Compressed Air System Calculator →How It Works
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Select Tool Rows
Start with the local preset rows, then replace CFM, pressure, and duty cycle with current manufacturer data whenever available.
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Set Simultaneous Usage
Enter how many of each tool can run at once. This is a planning input, not proof of a shop production profile.
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Enter Duty-Cycle Prompts
Use duty cycle to screen average demand. Continuous tools, spray work, and blasting still require OEM, air-quality, safety, and process review.
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Review Source Gaps
Use the CFM, receiver, and compressor-type prompts as questions for the supplier or reviewer, not as final package, receiver, pipe, or code-compliance decisions.
Built For
- Home shop owners choosing between a 60-gallon and 80-gallon compressor
- Auto shops sizing a compressor for multiple bays with simultaneous tool use
- Woodworkers matching compressor capacity to spray finishing equipment
- Fabrication shops evaluating whether to upgrade from single-stage to two-stage
- Contractors sizing a portable compressor for on-site work with multiple nailers
Assumptions
- Preset air-tool CFM rows are local prompts and must be replaced by current tool data when available.
- Recommended CFM is the larger of simultaneous demand and a 25 percent margin over average duty-cycle demand.
- Receiver gallons use a local 3 to 5 gal per delivered-CFM prompt, not ASME/OSHA receiver design.
- Compressor-type rows are screening bands, not verified OEM package performance.
Limitations
- Does not model pressure drop, pipe sizing, hose loss, quick-connect loss, leaks, controls, dryer/filter/regulator loss, or air quality.
- Does not certify CAGI performance, OEM package selection, ASME receiver design, OSHA air-receiver compliance, or relief-valve sizing.
- Does not perform electrical design, LOTO procedure, noise exposure assessment, paint/blast respiratory review, or safe-work authorization.
- Does not replace compressed-air specialist, electrician, safety, industrial-hygiene, supplier, insurer, owner, AHJ, or qualified review.
References
- CAGI Performance Verification source pointer
- U.S. DOE Compressed Air Systems source pointer
- OSHA 29 CFR 1910.169 Air Receivers source pointer
- ASME BPVC Section VIII Division 1 source pointer
- OSHA lockout/tagout and occupational-noise source pointers