16x32 Pool Gallons Calculator

Volume and dosing for a 16x32 ft pool

A 16 by 32 ft rectangular pool, one of the most common in-ground pool sizes, holds about 17,280 gallons at a typical 4.5 ft average depth (a 3 ft shallow end and 6 ft deep end), using the standard formula length × width × average depth × 7.5.

The salt figure assumes you're starting from 0 ppm and targeting a common saltwater-chlorinator setpoint of 3,200 ppm; if your pool already has some salt in it (check with a test strip or your chlorinator's built-in reading), use the Pool Salt Calculator to enter your current level instead.

The chlorine figure shows a starting-point dose to raise free chlorine by 3 ppm using 12.5% liquid chlorine -- a common amount for a weekly maintenance boost. Always test your water first; your actual dose depends on your current reading and target.

Where these numbers come from

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

• standard rectangular pool volume formula (7.5 multiplier)
• salt dosing at 1 lb per 120,000 gallons per 1 ppm change, consistent with major saltwater chlorinator manufacturer guidance
• liquid chlorine dosing at approximately 10 fl oz of 12.5% chlorine per 10,000 gallons per 1 ppm free chlorine increase

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