Compressed Air System Calculator
Compressed air is often called the most expensive utility in an industrial plant, and leaks are where most of that cost quietly escapes. This calculator takes your estimated total leak rate, the compressor's specific power consumption, annual operating hours, and electricity price, then reports the power required just to supply the leaks, the annual energy wasted, and the annual dollar cost of those leaks. Because leaks run continuously whether or not the plant is producing, the annual cost often dwarfs what operators expect. For two related efficiency measures that pair naturally with a leak-repair program, see our Variable Frequency Drive Savings Calculator and Industrial Motor Energy Calculator.
Unmanaged compressed air systems commonly lose 20-30% of total compressor output to leaks — a facility-wide ultrasonic leak survey gives the most accurate estimate.
Well-maintained, efficient rotary screw compressors at 100 psi typically require 0.16-0.25 kW per CFM of output.
Leaks run continuously, 24/7/365, even outside production hours — unlike production equipment, they don't stop when the plant does.
Industrial electricity rates vary by region and tariff; adjust to your actual blended $/kWh.
estimated total leak rate (CFM) × compressor specific power (kW per CFM)
power required to supply leak rate (kW) × operating hours per year
annual energy wasted (kWh) × electricity price ($/kWh)
Results update live as you type. For planning and field-check estimates — always verify against applicable standards and equipment ratings.
How we calculate this →Compressed air leaks don't stop when the plant does — a 50 CFM leak rate (common in an unmanaged system) running around the clock costs roughly $7,884 a year in wasted electricity at $0.10/kWh, even if the facility only operates one shift. That's because compressed air leaks are constant, not tied to production hours. DOE and Compressed Air Challenge data commonly finds that leaks account for 20-30% of total compressor output in facilities without an active leak-detection program — making leak repair one of the fastest-payback efficiency measures in industrial energy management.
How compressed air leak cost is calculated
This calculator ties the energy and money lost to compressed air leaks to four inputs: the total leak rate, the compressor's specific power consumption, the hours the system stays pressurized, and the electricity price. Three quantities tie the calculation together.
Power Required to Supply Leak Rate (kW) = Estimated Total Leak Rate (CFM) × Compressor Specific Power (kW per CFM). Every CFM of air that escapes through a leak still had to be compressed, and specific power says how many kilowatts the compressor draws per CFM of output; at 50 CFM and 0.18 kW/CFM, that is 50 × 0.18 = 9 kW of power consumed just to feed the leaks.
Annual Energy Wasted (kWh) = Power Required to Supply Leak Rate (kW) × Operating Hours per Year. Because leaks are physical openings that release pressurized air for as long as the system is pressurized, the relevant hours are the hours the air system runs — typically 8,760 for a continuously pressurized plant, not just production hours. At 9 kW and 8,760 hours, that is 9 × 8,760 = 78,840 kWh wasted annually.
Annual Cost of Leaks ($/year) = Annual Energy Wasted (kWh) × Electricity Price ($/kWh); at 78,840 kWh and $0.10/kWh, that is 78,840 × 0.10 = $7,884 per year. The leak rate is the single most decision-relevant input: DOE and Compressed Air Challenge data commonly find that unmanaged systems lose 20-30% of total compressor output to leaks, while well-managed systems with regular ultrasonic leak surveys can hold leak rates to the single digits. Specific power varies with compressor type, age, maintenance, and system pressure — well-maintained rotary screw compressors at 100 psi typically run 0.16-0.25 kW per CFM. Two notes on the model. First, the calculator treats the leak rate as a continuous, steady load, which is a reasonable planning assumption but understates the real-world variability of leak growth over time (leaks tend to develop and worsen as fittings loosen). Second, it captures only the energy cost of leaks — not the additional costs of the extra compressor capacity, maintenance, or moisture and contamination that leaks can introduce. Data sources: DOE Compressed Air Challenge program data; compressed air system efficiency studies from industrial energy audits; compressor-specific power consumption from manufacturer specifications and CAGI (Compressed Air and Gas Institute) data; leak rate prevalence from facility energy audits; electricity cost data from EIA industrial rates.