What the result includes
- Estimated annual electricity cost
- Replacement-filter cost by interval
- Monthly ownership equivalent
- Multi-year total for an apples-to-apples comparison
Home buying worksheet
Price the purifier you will actually keep running.
Compare purchase price, electricity, filters, and clean-air delivery over the same ownership period.
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Air-purifier ownership cost
Compare the machine you can buy with the machine you can afford to keep running.
Annual electricity$121
Annual filters$60
5-year total$1,137
Monthly ownership cost$18.95
Planning ownership cost per CADR unit: $4.88. Actual power varies by fan speed.
How the calculator works
Air Purifier Cost Calculator: method and assumptions
Estimate purchase, electricity, and replacement-filter costs over the same ownership period before comparing air purifiers.
Planning formulaOwnership cost = purchase price + electricity use + replacement filters over the selected number of years.
Use realistic daily runtime
An air purifier provides clean air only while operating. Model the schedule you can actually maintain rather than a short test run.
Price replacement filters
Use the current filter price and expected replacement interval. Smoke, dust, and pets can shorten filter life.
Check room fit separately
A cheap machine is not a bargain if its clean-air delivery is too low for the room. Compare cost only among adequately sized options.
Questions before you decide
Calculator FAQ
How much does an air purifier cost to run?
Running cost depends on wattage, hours per day, electricity price, filter price, and replacement frequency. Purchase price alone is incomplete.
Does this calculator measure health benefit?
No. It estimates ownership cost. Room size, CADR, ventilation, pollution sources, and filtration performance must be evaluated separately.