Pool Fill Time Calculator

How It Works

Filling a pool takes longer than most people expect. A standard 5/8-inch garden hose delivers about 9 gallons per minute, so a 15,000-gallon pool takes roughly 28 hours of continuous filling. A 3/4-inch hose is about 50% faster. Some homeowners rent a fire hydrant meter from their water utility, which can deliver 50+ GPM — filling the same pool in about 5 hours. Water trucks (typically 6,000 gallons) are another option at about $300-400 per load. Check with your water utility before filling — some offer a one-time pool fill discount, and many adjust sewer charges since pool fill water does not enter the sewer system.