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Pool Evaporation / Cover Loss Calculator

Estimate planning loss from evaporation, splash-out, and water features, then compare uncovered and cover-use scenarios. This is not a leak diagnosis and it does not replace a bucket test.

Pool size

Loss assumptions

Optional planning inputs

Evaporation estimate updates automatically

Planning summary

Surface area 600 sq ft, 0.25 in/day for 10 days. Cover use keeps 65% of the modeled evaporation from reaching the air.

Water loss
1,074.7 gallons
4,068.1 liters
Inches over period
2.50 in
Water cost
$5.37

Uncovered scenario

Baseline loss with no cover factor applied.

Evaporation loss
934.5 gallons / 3,537.5 liters
Splash-out / features
140.2 gallons
Total planning loss
1,074.7 gallons / 4,068.1 liters
Water cost
$5.37

Cover-use scenario

Solar blanket while in use.

Evaporation loss
327.1 gallons / 1,238.1 liters
Splash-out / features
140.2 gallons
Total planning loss
467.3 gallons / 1,768.7 liters
Water cost
$2.34

Cover comparison

Cover savings only change the evaporation component. Splash-out and water-feature loss remain visible as separate context.

Water saved
607.4 gallons
2,299.4 liters
Water-cost avoided
$3.04
Cover factor
65% reduction

Cover and leak context

Use this as a planning estimate for water loss and cover ROI, not as a leak diagnosis.

  • Example: the same pool can show a very different loss profile once you switch from uncovered to a solar blanket or automatic cover.
  • Stop boundary: if the adjusted loss still looks abnormal after accounting for splash-out and cover use, run a bucket test instead of repeating this calculator.
  • ROI context: compare water saved and water-cost avoided before deciding whether a cover or cover habit change pays back.

Limitations

  • Evaporation changes with wind, humidity, sun, and temperature.
  • Autofill can hide a leak, so unexplained loss still needs a bucket test or leak detection.
  • Safety-cover water is separate and not modeled as stored pool water.
  • This is a planning estimate, not a leak proof or service quote.