Home
Pool Salt Calculator FAQ
Estimate the salt dose from pool volume, current ppm, target ppm, and the brand range for your salt cell.
FAQ
Is this for ice melt salt?+
No. This page is designed specifically for pool salt used in saltwater chlorinator systems. Ice melt salt, water softener salt, and table salt contain different additives or anti-caking agents that can damage your chlorinator cell and pool equipment. Only use pool-grade salt or sodium chloride specifically labeled for swimming pools.
Can I use gallons or liters?+
Yes. The calculator accepts pool volume in either US gallons or liters. The salt dose result is displayed in both pounds and kilograms regardless of which volume unit you choose, and the bag count adjusts to your selected bag size (40 lb or 25 kg) so you always know exactly what to buy.
Should I add salt all at once?+
For salt additions over 80–100 lb (or 40+ kg), it is better to split the dose into two or three stages. Add one portion, let the pump run for 4–6 hours to circulate and dissolve the salt, retest the water, then add more if needed. This staged approach helps you avoid overshooting the target ppm.
What if the target ppm is lower than the current ppm?+
The calculator returns a salt dose of zero because you do not need to add more salt. If your current level is significantly above the target, the calculator shows a Drain / Refill status, indicating that the only practical way to lower salinity is to dilute the pool water by draining a portion and refilling with fresh water.
Does this replace a chlorinator or water test?+
No. The calculator only converts a ppm gap and pool volume into a salt weight estimate. It does not test your water, operate your chlorinator, or diagnose equipment problems. Always use a reliable test kit or test strips to measure your current salt level, and refer to your chlorinator manual for the exact recommended range.
What salt cell brands are supported?+
The calculator includes presets for Generic, Pentair, Hayward, and Jandy. Each preset applies a typical ideal salt range for that brand (most major brands recommend 2700–3400 ppm). If your brand is not listed, select Generic and manually set the target ppm to match your manufacturer's recommendation.
What does oversalt mode do?+
Oversalt mode adds a small buffer (roughly 10–15%) to the calculated salt dose to compensate for measurement inaccuracies in home test kits and incomplete salt dissolution. It is enabled by default and recommended for most pool owners. Disable it if you have a precise digital salt meter or if you prefer to add salt incrementally.