Free Pool Care Calculators
Calculate your pool volume, chlorine, salt, shock, stabilizer, pH adjustments, and more in seconds.
Balanced water starts with the right numbers
Every good pool chemical calculation starts with the same thing: knowing exactly how many gallons of water are in your pool. Our free pool volume calculator gives you that number in seconds — then every other pool chemical calculator on this page uses it to tell you precisely how much liquid chlorine, salt, stabilizer, or baking soda to add.
We built these tools for Orlando homeowners, but the formulas are industry-standard and work for any residential swimming pool anywhere in Florida or the United States. Whether you're topping off a saltwater pool in Waterford Lakes, recovering a green pool in Wedgefield, or dialing in a brand-new spa in Winter Park, the same math applies.
Between Florida's summer thunderstorms, year-round UV, and heavy pollen loads, a residential pool in Central Florida chews through chemicals faster than pools almost anywhere else in the country. Our pool maintenance calculator suite — from a chlorine calculator and salt calculator through pH, alkalinity, and pump run-time tools — helps you dose accurately the first time instead of chasing your water week after week.
Every calculator updates instantly as you type, uses accepted Florida pool care formulas, and shows the math behind the answer. If you'd rather have a licensed pro handle balancing for you, we offer weekly pool service throughout the Orlando area — start with Weekly Pool Service.
Pool Volume Calculator
Calculate the exact volume of your swimming pool in gallons and liters. Every chemical calculation on this page starts here.
Use this number as the "Pool Gallons" input in every calculator below.
Formula: Length × Width × Avg Depth × 7.5
Liquid Chlorine Calculator
Figure out exactly how much liquid chlorine (sodium hypochlorite) to add to reach your target free chlorine level.
Pour slowly around the deep end with pump running. Retest after 4–6 hours.
Formula: oz = (Target − Current) × Gallons × (11 or 13) / 10,000
Chlorine Tablet Calculator
Estimate how many 3-inch trichlor chlorine tablets your pool may need each week for routine chlorine maintenance.
Actual tablet use varies with sunlight, water temperature, rainfall, swimmer load, circulation, tablet brand, and feeder setting. This calculator provides an estimate only.
Formula: Trichlor lb = (Gallons / 120,000) × ppm × days ÷ 0.90 · CYA ≈ 0.6 × ppm added
Shock Calculator
Calculate how much cal-hypo shock to add based on your pool's condition — from routine weekly shock through a green-pool recovery dose.
Pre-dissolve in a bucket for vinyl or fiberglass pools. Run pump 8+ hours after shocking.
Formula: lbs = (Gallons / 10,000) × dose (1×, 2×, or 3×)
Salt Calculator
Calculate exactly how many 40 lb bags of pool salt you need to reach your salt cell's target ppm. Most Florida saltwater pools target 3000–3400 ppm.
Broadcast slowly around the pool with pump running. Wait 24 hours before retesting.
Formula: lbs = (Target − Current) × Gallons / 120,000
Stabilizer (CYA) Calculator
Cyanuric acid protects chlorine from Florida sun. Target 30–50 ppm for chlorine pools, 60–80 ppm for saltwater pools.
Add through the skimmer or use a stabilizer sock. Takes 3–5 days to fully dissolve.
Formula: lbs = (Target − Current) × Gallons × 0.8125 / 100,000
pH Calculator
Raise or lower pH to the ideal 7.4–7.6 range. Uses muriatic acid to lower and soda ash to raise.
Add over a return jet with pump running. Retest in 4–6 hours. Never mix chemicals.
Formula: Based on 1 qt muriatic / 10,000 gal or 6 oz soda ash / 10,000 gal per 0.2 pH
Total Alkalinity Calculator
Baking soda (sodium bicarbonate) raises total alkalinity and stabilizes pH. Target 80–120 ppm for most pools.
Broadcast across the pool with pump running. Wait 6 hours before retesting pH.
Formula: lbs = (Target − Current) × Gallons × 1.4 / 100,000
Pump Run Time Calculator
A pool needs one full turnover of water each day. Recommendations adjust for pump type and Florida's summer vs. winter chemistry demands.
Split into two runs (morning + afternoon) for best chlorine distribution during summer heat.
Formula: Turnover hours = Gallons / (Avg GPM × 60), bounded by season minimums
Related pool care services
Balancing chemicals is only part of pool care. Explore the full range of services Sunny Clean Pool offers to Orlando-area homeowners.
Pool calculator FAQs
How do I calculate the volume of my swimming pool?
Multiply length × width × average depth × a shape factor: 7.5 for rectangular pools, ~5.9 for oval, and ~7.0 for kidney-shaped pools. For a round pool, use π × (diameter ÷ 2)² × average depth × 7.5. The result is the pool volume in U.S. gallons.
How much liquid chlorine do I need to raise free chlorine by 1 ppm?
For 12.5% liquid chlorine (pool-grade sodium hypochlorite), roughly 11 fluid ounces per 10,000 gallons raises free chlorine by 1 ppm. For 10% household strength, use about 13 fluid ounces per 10,000 gallons per 1 ppm.
What's the difference between liquid chlorine and chlorine tablets?
Liquid chlorine (sodium hypochlorite) is a fast-acting, unstabilized sanitizer — it raises free chlorine right away, has a near-neutral effect on pH over time, and does not add cyanuric acid (CYA). It's ideal for shocking, correcting low chlorine, and treating green pools. Chlorine tablets (trichlor) are a slow-dissolving stabilized sanitizer built for routine, hands-off maintenance through a feeder or floater — but every tablet also adds CYA and lowers pH, so long-term tablet-only use tends to over-stabilize Florida pools and force acid additions. Most Orlando pools do best using tablets for baseline chlorine and liquid chlorine for shocking and mid-week boosts.
How much salt do I add to a saltwater pool?
To raise salt by 1,000 ppm in 10,000 gallons of water, add about 83 pounds of pool salt — roughly two 40-pound bags. Always test after circulating for 24 hours before adding more.
How much stabilizer (CYA) should I add?
About 13 ounces (0.8 lb) of cyanuric acid per 10,000 gallons raises CYA by 10 ppm. Most Florida saltwater pools target 60–80 ppm; chlorine pools target 30–50 ppm.
How long should I run my pool pump in Florida?
Single-speed pumps typically run 8–10 hours a day in summer and 4–6 hours in winter. Variable-speed pumps usually run 12–24 hours at low RPM to achieve one full turnover of the pool water daily.
Are these pool calculators accurate for Orlando pools?
Yes. The formulas are industry-standard and used by CPO-certified pool operators throughout Florida. They give you a starting point — always test your water 24 hours after adjusting and fine-tune based on results.
Need help with your pool?
If balancing chemicals has become frustrating, let Sunny Clean Pool handle it for you. We provide weekly pool service, green pool cleanup, equipment repairs, and filter cleaning throughout the Orlando area.