Formula & worked example
Specific power=P/FAD; annual energy=P×hours.
A 75 kW package delivering 12 m³/min has specific power 6.25 kW/(m³/min), about 17.70 kW/100 CFM.
Plant engineering calculator · Updated Sep 17, 2026
Compressor Specific Power Calculator — kW/100 CFM, kW/(m³/min) & Cost
Benchmark an air compressor from measured package power and free-air delivery. Returns kW per m³/min, kW per 100 CFM, specific energy, annual electricity use and annual cost.
Inputs
Live result
Specific power 6.25 kW/(m³/min)
Specific power 17.69803 kW/100 CFM
Specific energy 0.1041667 kWh/m³
Annual electricity 450 MWh
Annual electricity cost 54,000
Assumptions & limits
- Use total package input power when benchmarking a packaged compressor.
- FAD and power should be measured at the same stable operating point.
Frequently asked questions
What does this Compressor Specific Power Calculator calculate?
Benchmark an air compressor from measured package power and free-air delivery. Returns kW per m³/min, kW per 100 CFM, specific energy, annual electricity use and annual cost.
Can I use the result for final equipment selection?
Use it for screening, benchmarking and option comparison. Final selection should use measured conditions, manufacturer performance data and applicable engineering standards.
Why are assumptions shown beside the calculation?
Plant calculations change materially with pressure basis, reference conditions, efficiencies and operating profile. Explicit assumptions make the result auditable instead of hiding those choices.