United States calculator
Estimate U.S. pool water loss and possible leak excess
Convert a measured pool-level change into U.S. gallons lost per day after accounting for rainfall and added water, then compare it with an entered evaporation allowance.
Level drop • rain • refill • gallons
Calculator inputs
Pool Water Loss Calculator results
How this Pool Water Loss Calculator works
Water loss equals measured level drop plus rainfall that otherwise would have raised the pool, minus water intentionally added. Surface area converts net inches of loss to cubic feet and U.S. gallons.
Important: Measurement error, splash-out, backwashing and autofill operation can resemble a leak. Use a bucket test and qualified pool service when loss remains unexplained.
What assumptions should I verify?
Verify every entered quantity, rate, unit, product specification and local requirement before relying on the estimate. U.S. conventions are primary where location matters.
Is information sent anywhere?
No. Calculations run locally in the browser and this calculator sends no entered information to a remote service.