Pool Salt Bags Calculator
Calculate Exactly How Many 40 lb / 25 kg Bags to Buy
Pool salt is sold almost exclusively in 40 lb (18.1 kg) bags in the US and 25 kg bags internationally. Enter your pool specs below to get the exact bag count to grab at the store.
Interactive Pool Salt Calculator
Adjust the sliders or type your measurements directly to get instant salt requirements
Salt Required
Required salt to reach target salinity.
Common sizing for most stores in the United States.
Standard package size in Canada, UK, and Australia.
Safe Dissolving Advisory: Pour the salt bags directly along the deep end perimeter of your pool. Turn on your primary filter pump and brush the salt heaps until they are completely dissolved. Maintain circulating currents and keep your salt cell chlorinator turned off for 24 hours while the salt disperses to avoid low/high voltage spikes.
Prevent liner staining and cell scale by using fast-dissolving, high-purity pool-grade evaporated salt.
Standard Pool Salt Bag Sizes & Handling
In North America, commercial pool salt (such as Morton, Clorox, or Diamond Crystal) is packaged in 40 lb bags. In Europe and Australia, 20 kg and 25 kg sacks are the standard.
Always round up to the nearest whole bag so you have extra on hand for mid-season splashout, heavy backwashing, and rainfall dilution.
Storing Leftover Pool Salt Bags
If you have partial bags left over, seal the opening with heavy-duty tape and store on a wooden pallet off concrete floors. Unsealed salt absorbs atmospheric humidity and will harden into a solid block.