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Pool Evaporation Calculator

Weekly and period water loss in gallons from surface area and bucket-test inches, plus refill cost.

Inputs

Inputs and assumptions

Water surface area in square feet.

Inches lost per week from a bucket test, typically 0.5-2 inches.

Days in the period, usually 7 for weekly loss.

From your water bill, per 1,000 gallons.

Result

Water lost (gal)
1,870
Refill cost (USD)
$11.22
Loss per week (gal)
436
Measure water edge to water edge. Estimates assume standard shapes; verify odd pools against dose response.

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01 Evaporation and Pool Covers: Calculate Water Loss and Savings

Related articles

01 Evaporation and Pool Covers: Calculate Water Loss and Savings 02 How to Measure Pool Volume: Dimensions, Depth, and Gallons

Workspace

Keep the assumptions with the result.

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