Salt Water Pool Conversion Cost Calculator

Real numbers from a real conversion — not marketing estimates. Drag the sliders to match your pool and utility rate; every result updates instantly and your inputs stay in the link, so you can share or save your scenario.

Your pool today

Current pump powerWCheck the pump label — single-speed pumps typically draw 700–2,000 W.Pump run timeh/dayElectricity rate$/kWhFrom your utility bill. US average ≈ $0.17; CA/NE often $0.30+.Chlorine & chemicals$/yr

After conversion

Variable-speed pump powerWAt scheduled low RPM — the whole point of a variable-speed pump.Salt & chemicals$/yrSalt top-ups, cell cleaner, balancers. Far less than chlorine.

Startup costs

Variable-speed pump$Salt chlorine generator$Salt (initial fill)$Fittings & misc$Test strips$

$1,356

saved every year

80% lower annual operating cost

$1,515

upfront investment

$5,265

net gain by year 5

Current setup$1,697/yr

After conversion$341/yr

Itemized startup

Variable-speed pump	$595
Salt chlorine generator	$700
Pool salt (initial fill)	$110
Plumbing fittings	$85
Salt test strips	$25
Total	$1,515

See the math

Electric: kWh/yr = watts ÷ 1000 × hours/day × 365 → 2555 kWh/yr now vs 292 kWh/yr after, at $0.30/kWh = $767 → $88 per year.

Chemicals: $930/yr chlorine → $253/yr salt-system consumables.

Payback: startup ÷ annual savings × 12 = $1,515 ÷ $1,356 × 12 = 13.4 mo. No inflation or financing assumed; salt-cell replacement (~every 5 yr) not included.

Where the defaults come from

The preset numbers are a documented 15,000-gallon conversion: a single-speed pump (700 W, 10 h/day) plus weekly chlorine was replaced with a variable-speed pump (80 W at scheduled speed) and a salt chlorine generator. Electricity dropped from $766 to $88 per year, chemicals from $930 to $253 — $1,356 saved every year against a $1,515 upfront investment, paying back in about 13 months.

Your pool will differ — that's what the sliders are for. The two numbers that move the result most are your electricity rate and your current pump wattage.

Frequently asked questions

How much does it cost to convert a pool to salt water?

A typical DIY conversion runs $1,200–$2,500: a salt chlorine generator ($500–$1,500), initial salt fill (~$100–$150), and fittings. Adding a variable-speed pump (~$600–$1,200) raises upfront cost but usually delivers the largest annual savings.

How long does a salt water conversion take to pay for itself?

With a variable-speed pump included, most pools pay back in 12–24 months. The reference conversion behind this calculator ($1,515 upfront, $1,356/yr saved) paid back in about 13 months.

Is a salt water pool cheaper to run than chlorine?

Generally yes. Salt and cell maintenance typically cost a few hundred dollars a year versus $700–$1,200+ for chlorine and shock, and pairing the conversion with a variable-speed pump can cut pump electricity by 80–90%.