
Contractor Job Estimator
Price remodels and GC work, then send a quote with no internal numbers.
Excel or Google Sheets. Best on a computer.
$29.00
BuyEstimate annual compressor power spend and leak waste
Use your compressor horsepower, schedule, and electric rate to estimate operating cost, then expose leak cost impact and practical savings opportunities.

Price remodels and GC work, then send a quote with no internal numbers.
Excel or Google Sheets. Best on a computer.
$29.00
BuyCheckout opens in a new tab.
Want a client-ready quote instead of just the numbers? Excel + Google Sheets workbook for metal shops — cost, markup, and a clean customer quote.
View on Etsy →Use efficient compressor hardware and line-management accessories to reduce wasted air and operating spend.





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Compressed air is often one of the most expensive utilities in fabrication and manufacturing shops. Most total cost over a compressor's life comes from electricity, not purchase price.
Annual Cost = Power (kW) x Loaded Hours x Electric Rate
Live logic uses 0.746 kW per HP and 90% motor efficiency assumption, then applies your load factor and schedule.
The calculator adds optional leak cost using the same live model constant of 0.20 kW per CFM for compressed air generation.
| Compressor Type | CFM/HP | Relative Operating Cost | Best Use Case |
|---|---|---|---|
| Old Single-Stage Piston | 3.0-3.3 | Highest | Replace when possible |
| Two-Stage Piston | 3.5-3.8 | High | Intermittent small-shop use |
| Standard Rotary Screw | 3.8-4.2 | Medium | Steady production demand |
| Modern Rotary Screw | 4.2-4.5 | Low | General industrial duty |
| Variable Speed Drive (VSD) | 4.5-5.0+ | Lowest | Variable demand operations |
A 10 HP compressor running 50 hours/week at $0.12/kWh can exceed $2,000/year in electricity. Leak and pressure improvements can cut that total significantly.
Leaks can run continuously even when tools are idle, so they multiply cost over all yearly operating hours.
Check electric rate, load factor, and leak CFM first. These inputs have the largest effect on final annual spend.