Gallons to Liters Converter

Gallons and liters for pool owners

One US gallon is exactly 3.785411784 liters. Most US pool volume charts, chemical labels and dosing rules are written in gallons, but you'll run into liters in three common situations: a pool built or spec'd outside the US, imported pumps, heaters or filters whose flow rate is rated in liters per minute, and some chemical concentrates (especially algaecides and clarifiers) that list dose per liter rather than per gallon.

Example: a 20,000 gallon pool holds about 75,708 liters. If your pump's flow rate is rated at 300 liters per minute, that converts to about 79 gallons per minute for comparing against a US-rated pool pump size calculator result.

This same gallons-to-liters conversion also appears on other sites in the Calcs family for their own subject matter -- the factor is identical everywhere, but the examples above are specific to pool and spa volumes and equipment.

Where these numbers come from

The formulas and default values in this calculator are based on:

• NIST Handbook 44 (1 US gallon = 3.785411784 liters exactly, the internationally recognized SI conversion for the US liquid gallon)

These are planning estimates. Test your actual water, follow product labels, and check your equipment manufacturer's guidance before you buy or dose chemicals.