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Surface Coverage Calculator

Get the working solution, the concentrate and the chemical cost for an area from a label coverage rate, with the dilution convention stated.

Inputs

Range: 1–1,000,000

Length times width of the area to be cleaned.

Range: 50–20,000 sq ft per gallon

From the product label or technical data sheet. 1000 sq ft per gallon is typical for a spray, 2000 to 4000 for a mop and scrub.

Range: 1–512

The number after the colon on the product label.

Check the label wording. "1:64 solution" and "1 oz per 64 oz of water" do not mean the same thing.

Range: 0–1,000,000 per gallon

Enter the current purchase price in US dollars for the unit shown.

Result

Concentrate needed in fl oz
2.0 fl oz
Concentrate needed
0.0156 gal
Chemical cost for this area
$0.28
Chemical cost per 1,000 sq ft
$0.14
Working solution needed
1.00 gal
Working solution per 1,000 sq ft
0.50 gal
Reading: what this result means for the job
Between a quart and four gallons of working solution. A 3 gallon mop bucket covers this in one mix, which is the cheapest way to apply it: one fill, one dose, one walk of the floor.
Applicability limit
This is a planning figure for the values entered, not a measured result. Coverage rates, product yields and application rates are properties of a specific product, applicator and substrate, and the label or data sheet for the product you are using always takes precedence over the default here. The EPA-registered label governs. Using a registered antimicrobial inconsistently with its labeling is unlawful under 7 U.S.C. 136j(a)(2)(G), and 40 CFR 156.10(i)(2)(ii) requires every label to carry that statement. This tool does arithmetic; it does not approve a dilution, and it does not determine compliance.
Check before the job

Working

Working solution needed
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Working solution per 1,000 sq ft
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Concentrate needed
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Concentrate needed in fl oz
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Chemical cost for this area
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Chemical cost per 1,000 sq ft
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What to check

  • Read the coverage rate from the product label or its technical data sheet, not from a competing product.
  • Check the first mix against the area it actually covers before ordering for a whole building.
  • Confirm the price entered is per gallon of concentrate, not per case and not per ready-to-use bottle.

Related calculators

The coverage rate is an input because it is not universal: 1,000 sq ft per gallon is a spray, 2,000 to 4,000 is a mop, and porosity and soil load move both. A result is a planning figure at the rate you entered, not a promise that one container finishes the job.