Pool Salt Addition
Calculator
Results
- Increase needed (ppm)
- 2,000
- Product to add (g)
- 100,200.400801
- Product to add (kg)
- 100.2004
- Bags of 25 kg
- 4.008016
Pool and aquarium results
| Increase needed (ppm) | 2,000 |
| Product to add (g) | 100,200.400801 |
| Product to add (kg) | 100.2004 |
| Bags of 25 kg | 4.008016 |
formula-map diagram
- Increase needed (ppm)
- 2,000
- Product to add (g)
- 100,200.400801
- Product to add (kg)
- 100.2004
- Bags of 25 kg
- 4.008016
Pool and aquarium relationship
Formula
salt = (target − current) × volume(m³) ÷ (purity ÷ 100)= 2000
Note
This is a simplified model: it applies a standard geometric or physical formula to the numbers you entered. Volumes assume a regular shape and an even average depth, and the kidney shape uses the common 0.45 × (A + B) × L area approximation. Chemical doses convert a target change into a product mass using the strength or label dose you enter, because the amount of active ingredient varies from product to product; they ignore pH, temperature, buffering, sunlight, bather load and existing chemical interactions. Heating uses Q = m × c × ΔT with c = 4186 J/kg·K and ignores heat losses to air, ground and evaporation; evaporation and cover figures use the rate you enter, not local weather. Aquarium stocking by surface area is a rule of thumb, not a biological limit. Always follow the product label and test the water before and after dosing, and consult a pool or aquarium professional for anything you are unsure about.
More in Pool and aquarium
See all →Frequently asked questions
Why does a salt pool need a specific salt level instead of just 'some salt'?+
Salt chlorine generators are engineered to operate within a manufacturer-specified range, typically 2700-3400 ppm, and produce chlorine via electrolysis only within that window — too little salt and the cell can't generate enough chlorine or may trigger a low-salt alarm, too much and it accelerates cell wear and can trip a high-salt shutoff. The calculator uses your current reading, pool volume, and target level to compute exactly how much salt to add.
Why does the calculator ask for my current salt level instead of assuming the pool starts at zero?+
Salt doesn't evaporate or break down the way chlorine does, so unless water has been drained, backwashed heavily, or diluted by rain, some salt is usually already present from prior additions. Dosing as if starting from zero would substantially overshoot the target and push the pool above the safe operating range.
Is pool salt the same as table salt?+
Chemically, yes — both are sodium chloride — but pool salt is sold in a coarser, purer form (typically 99%+ NaCl) without the anti-caking agents and iodine additives found in table salt, which can affect water clarity or generator sensors. Always use salt labeled for pool or water-softener use, never table salt, for a large-volume addition.
Why does salt level fluctuate over a season even without a leak?+
Backwashing the filter, splash-out, and topping off with fresh water (which has zero salt) all gradually dilute the pool, so salt level trends downward over a season and needs periodic small additions. A sudden, large drop, on the other hand, is a sign worth investigating for a possible leak.
Can too much salt damage pool equipment or be unsafe to swim in?+
Extremely high salt levels, well above the 3400-4000+ ppm range, can accelerate corrosion of pool ladders, heaters, and other metal fixtures and can trip most generators into a shutdown state as a protective measure. At levels used in a properly dosed salt pool, the water tastes and feels far less salty than seawater and is entirely safe to swim in.