How do you calculate blast compressor energy cost?

Multiply compressor energy (kWh) by the utility rate and the loaded blast duty, then add demand and fixed charges. For 850 kWh at $0.14/kWh, 88% loaded duty, plus a $35 charge, the total compressor energy cost is $139.72.

Why include a loaded duty cycle instead of just kWh times rate?

A compressor does not run loaded 100% of the time — it unloads between blasting and during media changes. Applying an 88% loaded duty to 850 kWh at $0.14 gives a loaded energy cost of $104.72, which is more accurate than assuming full-load throughout.

What is the effective cost per kWh after demand charges?

Demand and fixed charges raise your effective rate above the headline utility rate. In the worked example the $35 fixed charge pushes the effective cost to about $0.164 per kWh versus the $0.14 base rate.

How much does it cost to run a blast compressor per hour?

It depends on motor size and rate, but a useful approach is to estimate kWh for the job, apply your duty cycle and rate, then add demand charges. Divide the resulting total by job hours to get a per-hour figure for your quote.

Should demand charges go into every job?

Demand charges are largely fixed monthly costs tied to peak draw, so allocate a share to each job rather than charging the full amount each time. Here $35 represents that allocated slice added on top of the $104.72 loaded energy cost.

How do I lower blast compressor energy cost?

Right-size the nozzle to the compressor, fix air leaks, maintain proper pressure, and schedule heavy blasting off-peak where demand pricing applies. Reducing the loaded duty or the kWh per job both cut directly into the $139.72 total.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Blast Compressor Energy Cost Calculator

Blast compressor energy cost captures what it actually costs in electricity to drive the air compressor behind a blasting operation — typically the single largest energy line item on a blast shop's utility bill. Estimators, shop owners, and operations managers use it to load energy correctly into job quotes and to compare the running cost of different compressors or nozzle sizes. Air blasting is energy-intensive: a large rotary-screw compressor can pull tens of kilowatts continuously, and at industrial demand charges the dollars add up fast. Separating the loaded duty cycle from idle time and adding fixed demand charges gives a far more honest cost than simply multiplying nameplate power by hours.

What this calculator does

Estimate electrical energy cost from compressor kWh, utility rate, loaded duty percentage, and demand or fixed charges.
you need to include compressor electricity in a blast quote or compare energy impact between setups
It computes the total electricity cost of running your blast compressor for a job, combining loaded energy use at your utility rate with demand and fixed charges.

Formula used

Loaded energy cost = compressor energy × utility energy rate × loaded blast duty
Total compressor energy cost = loaded energy cost + demand/fixed charge

Inputs explained

Compressor electricity consumed per job:
Utility electricity rate:
Loaded blast duty cycle:
Demand and fixed energy charges:

How to use the result

Use it when quoting jobs, comparing compressor or nozzle options, or building an energy allocation into your hourly shop rate.
It treats the duty cycle as a single average; real compressors cycle between loaded and unloaded states, and the entered kWh must already reflect actual draw rather than nameplate rating for the result to be accurate.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.

Common questions

How do you calculate blast compressor energy cost? Multiply compressor energy (kWh) by the utility rate and the loaded blast duty, then add demand and fixed charges. For 850 kWh at $0.14/kWh, 88% loaded duty, plus a $35 charge, the total compressor energy cost is $139.72.
Why include a loaded duty cycle instead of just kWh times rate? A compressor does not run loaded 100% of the time — it unloads between blasting and during media changes. Applying an 88% loaded duty to 850 kWh at $0.14 gives a loaded energy cost of $104.72, which is more accurate than assuming full-load throughout.
What is the effective cost per kWh after demand charges? Demand and fixed charges raise your effective rate above the headline utility rate. In the worked example the $35 fixed charge pushes the effective cost to about $0.164 per kWh versus the $0.14 base rate.
How much does it cost to run a blast compressor per hour? It depends on motor size and rate, but a useful approach is to estimate kWh for the job, apply your duty cycle and rate, then add demand charges. Divide the resulting total by job hours to get a per-hour figure for your quote.
Should demand charges go into every job? Demand charges are largely fixed monthly costs tied to peak draw, so allocate a share to each job rather than charging the full amount each time. Here $35 represents that allocated slice added on top of the $104.72 loaded energy cost.

Last reviewed 2026-05-12.