Pool Salt Pounds Calculator

1. 1Enter pool volume (gal).
2. 2Enter current salt level (ppm).
3. 3Enter target salt level (ppm).
4. 4Read your salt needed on the right — it updates as you type.
5. 5Hit Share to keep the scenario or send it to someone.

About this calculator

Saltwater pools rely on a salt chlorinator that converts dissolved salt into chlorine, and it needs the water's salt concentration to sit within a specific range, typically 2,700-3,400 ppm depending on the chlorinator model, to function correctly. This calculator takes your pool's total gallons, your current salt level in ppm (measured with a test strip or digital tester), and your target salt level, then calculates the pounds of salt needed to close that gap using the standard conversion that one pound of salt per 120 gallons raises salinity by roughly 100 ppm. Adding too little salt leaves the chlorinator unable to generate adequate chlorine, leading to algae and cloudy water, while adding too much can trip the chlorinator's high-salt safety cutoff or, in extreme cases, damage pool surfaces and equipment over time. This tool is meant for topping up an already-salted pool or converting a chlorine pool to salt for the first time — always add salt gradually and let it fully dissolve and circulate for several hours before retesting.

What each field means

FAQ

Accuracy and limitations

• Estimates assume standard, average conditions — local rules, pricing, and materials vary.
• Results are rounded for readability; add a buffer before ordering, booking, or committing.
• Double-check anything with a real cost attached against a local quote.