POPULAR CALCULATORS
BROWSE CATEGORIES
FIRST-TIME POOL OWNER?
Inherited a pool & don’t know where to start?
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- Avoid the most common new-owner mistakes
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🎓 POOL SCHOOL
Calculator explanations and Know Your Pool videos make the numbers easier to understand.
📘 COMPANION GUIDES
Printable guides that go with your calculators — examples, record pages, troubleshooting, and reference information.
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ALL CALCULATORS
Use the search above to quickly find the pool tool you need, or browse the full calculator library below.
Browse All Calculators
Explore the complete PoolToolkit calculator library by category.
Getting Started
- Pool Volume CalculatorGallons / Liters from pool shape & dimensions
- Spa/Hot Tub Volume CalculatorEstimate spa gallons from dimensions
Balance (Core)
- Borates Dose CalculatorBoric acid / borax dosing to target ppm
- Calcium Hardness (CH) AdjusterCalcium chloride dose to raise CH
- CYA / Stabilizer (Granular) CalculatorHow much stabilizer to reach a target CYA
- LSI / CSI Calculator (Plaster & SWG)Calc saturation index and recommended range
- pH Adjuster CalculatorHow much acid or soda ash to move pH
- TDS Helper (When it matters)Quick guidance on TDS and practical actions
- Test Kit Dilution HelperDilution math for high readings
- Total Alkalinity (TA) AdjusterBaking soda / acid dosing to reach target TA
- Water Temperature ConverterFahrenheit ↔ Celsius
Balance (Extended)
- Acid Demand Test HelperTurn demand drops into ounces
- Ammonia Recovery HelperGuidance + testing steps
- Base Demand Test HelperTurn demand drops into ounces
- Borate pH Buffer HelperBorate benefits/cautions reference
- CH to CSI Impact ViewerSee how CH changes CSI
- Clarifier Dose HelperEstimate dosing + cautions
- Enzyme Dose Reminder HelperWeekly enzyme planning
- Flocculant Dose HelperDose estimate + settling steps
- pH Drift Helper (Aeration/TA)Why pH rises and what to do
- Phosphate Remover DoseDose estimate by phosphate level (education)
- Salt to CSI Impact ViewerSee how salt changes CSI
- TA to CSI Impact ViewerSee how TA changes CSI
- Temperature to CSI Impact ViewerSee how temp changes CSI
Chlorine & Sanitizers
- Biguanide (PHMB) Basics HelperDecision helper & conversion notes
- Bleach Strength ConverterConvert % strength and dose equivalents
- Bromine Dose CalculatorBromine bank / oxidizer estimate
- Cal-Hypo Dose CalculatorDose calculator for calcium hypochlorite (granular)
- Chloramine / Breakpoint Chlorination HelperEstimate breakpoint dosing (education)
- Chlorine Cost per ppm (Compare Products)Compare liquid vs tabs vs cal-hypo cost
- Chlorine Dose (Liquid) CalculatorHow much liquid chlorine to add for a target FC rise
- CYA Increase from Tabs EstimatorEstimate CYA added over time
- Dichlor Dose CalculatorFC rise + CYA side effect estimate
- ORP vs FC Reference HelperHow ORP relates (and doesn’t) to FC
- Spa Chlorine Dose (Liquid)Liquid chlorine dosing for spas
- Trichlor Tab Dose CalculatorFC rise + CYA & pH/TA impact estimate
SLAM & Algae
- Algaecide Dose (Polyquat 60)Polyquat dosing (non-copper)
- Combined Chlorine (CC) Interpretation HelperWhat CC means + action steps
- Mustard Algae High-FC TargetHigher FC target based on CYA (post-SLAM)
- Overnight Chlorine Loss Test (OCLT) TrackerLog sunset/sunrise FC and auto-calc loss
- Shock / SLAM Target Calculator (Liquid)Target FC based on CYA and SLAM level
- SLAM Progress Log (FC/CC)Daily log with notes and milestones
Salt & SWG
- Should I Convert My Pool to Salt?Compare conversion cost, payback time, convenience, and compatibility
- Salt Cell Life Remaining EstimatorEstimate equivalent operating hours used and remaining cell life
- Salt Cell Cleaning Frequency HelperPlan inspection frequency from scale risk and cell condition
- Salt Add CalculatorHow much salt to reach SWG target ppm
- Salt Cell Output / Run TimeEstimate chlorine production vs run time
- SWG Sizing RecommendationPick a cell size based on demand
Circulation & Filters
- DE Finger Replacement PlannerPlan DE element replacement from age, damage, and pressure
- Multiport Valve TroubleshooterIdentify common valve checks from operating symptoms
- Sand vs Cartridge Pool FilterCompare maintenance, water use, debris, and filtration priorities
- Robot vs Suction Pool CleanerCompare price, debris handling, plumbing, and convenience
- Cartridge Filter Square-Foot RecommendationEstimate minimum cartridge area from design flow
- Pool Filter Velocity CalculatorCalculate filter loading rate and face velocity
- Filter Cartridge Replacement EstimatorEvaluate age, pressure recovery, cleaning, and physical damage
- Backwash Water Loss EstimatorEstimate gallons lost per backwash
- Cartridge Filter Cleaning Interval HelperCleaning frequency guidance + log
- DE Filter: DE Recharge CalculatorHow much DE to add after backwash
- Filter Pressure Delta TrackerLog clean/dirty PSI and cleaning triggers
- Flow Rate Estimator (Pipe/Head)Rough flow estimate helper
- Pump Run Time PlannerSchedule run time based on goals
- Sand Filter: Sand Amount FinderEstimate sand weight for filter size
- Skimmer & Weir Diagnostic ChecklistStep-by-step walkthrough of common skimming problems.
- Skimmer Symptom CheckerCheck your symptoms and get ranked likely fixes.
- Turnover Time CalculatorEstimate turnover based on flow and volume
Equipment & Plumbing
- Pool Bypass Valve CalculatorEstimate bypass percentage and equipment-branch flow
- Pool Automation Relay PlannerCount required relays and available automation capacity
- Should I Replace My Pool Pump?Compare repair cost, energy savings, age, and ownership plans
- Variable-Speed Pump Savings CalculatorCompare annual electricity cost, savings, and payback
- Pool Pump GPM CalculatorCalculate required flow from turnover and feature demand
- Pool Pump Affinity Law CalculatorEstimate flow, head, and power changes with pump speed
- Deck Jet Flow EstimatorRough flow per jet guidance
- Filter Size RecommendationChoose filter size for pool volume
- Pipe Volume (Per Foot) CalculatorGallons in pipe by diameter and length
- Pump HP / Flow Reality CheckUnderstand pump ratings (education)
- Quick Skimmer & Return SizingFast count recommendation based on pool volume and shape.
- Skimmer & Return Count PlannerDetailed planning by pool size, wind exposure, surface features, and circulation goals.
- Waterfall Pump EstimatorFlow needed per width
Heating & Energy
- Heat Pump vs Gas Pool HeaterCompare warm-up speed, climate, and estimated energy cost
- Is My Pool Heater Worth Repairing?Compare repair cost, heater age, efficiency, and reliability
- Is a Solar Pool Cover Worth It?Estimate water savings, annual value, and simple payback
- Pool Heater Warm-Up Time CalculatorEstimate heating time from gallons, temperature rise, and output
- Pool Solar Heater Sizing & Panel QuantityEstimate collector area and solar panel quantity
- Pool Evaporation & Auto-Fill Cost CalculatorEstimate gallons lost to evaporation and the resulting refill cost.
- Pool Refill Water Cost CalculatorCalculate the cost of replacing a known amount of pool water.
- Electrical Cost (Pump/SWG/Heater)kWh cost per day/week/month
- Gas Heater Cost EstimatorEstimate fuel usage and cost
- Heat Loss / Cover Savings EstimatorCompare uncovered vs covered heat loss
- Heat Pump Run Time EstimatorRough runtime by conditions
- Pool Heater Bypass Flow GuideUnderstand heater flow requirements, bypass valves, and common setup problems.
- Heater Bypass Troubleshooting HelperSelect your symptoms and get practical bypass and valve-setting checks.
- Heater Size Estimator (BTU)Estimate BTU needed for desired temp rise
Water Replacement
- Should I Drain My Pool?Estimate partial replacement and review structural risks
- Dilution Mixing CalculatorMixing math for any parameter
- High CYA Quick Decision ToolEnter your CYA level and get a practical next-step recommendation.
- High CYA Options PlannerCompare draining, managing higher chlorine targets, and changing chlorine products.
- Partial Drain / Refill (CH Reduction)Drain % to reduce CH
- Partial Drain / Refill (CYA Reduction)How much to drain to reach target CYA
- Partial Drain / Refill (Salt Reduction)Drain % to reduce salt ppm
Construction & Renovation
- Pool Plumbing Pipe Length CalculatorEstimate total pipe length with fittings and waste
- Pool Trench Volume CalculatorEstimate trench excavation and backfill volume
- Concrete Pool Deck CalculatorEstimate deck area and concrete volume
- Concrete Yardage CalculatorEstimate concrete for slabs and pads
- Pool Equipment Pad Size PlannerPlan equipment footprints and service clearance
- Pool Safety Cover Anchor Layout PlannerEstimate perimeter anchor count for planning
- Pool Return Jet Layout PlannerEstimate return count, spacing, and flow
- Pool Main Drain Flow CalculatorCompare flow with listed suction-outlet capacity
- Pool Excavation Volume CalculatorEstimate excavation volume with overdig
- Pool Rebar EstimatorEstimate grid bar count and linear feet
- Pool Gravel & Sand Base CalculatorEstimate base volume and material weight
- Vermiculite Pool Floor CalculatorEstimate floor-base volume and bag quantity
- Pool Water & Winter Cover Weight CalculatorCalculate pool-water or cover-water weight
- Pool Fill Time, Water Truck & Refill CalculatorEstimate fill time and water-truck loads
- Pool Tile CalculatorEstimate waterline tile quantity with waste
- Pool Coping EstimatorEstimate coping pieces from perimeter and waste
- Vinyl Pool Liner Measurement HelperOrganize key liner measurements for field verification
- Pool Fence Requirement & Safety HelperReview barrier dimensions and gate safety features
- Should I Replace My Pool Liner?Evaluate age, leaks, damage, repair cost, and replacement timing
- Remodel or Resurface My Pool?Match surface condition and desired upgrades to project scope
Metals & Stains
- Ascorbic Acid Treatment PlannerPlan and precautions for AA stain lift
- Copper Algaecide Warning HelperCopper risks and stain potential
- Copper Stain TroubleshooterGreen hair/steps? Quick diagnosis
- Iron Stain TroubleshooterSymptoms → likely cause → next steps
- Metal Sequestrant DoseDose estimate by product strength
- Metal Test Interpretation HelperHow to read iron/copper tests
Startup & Closing
- Antifreeze Amount EstimatorEstimate line antifreeze volume (rough)
- Cover Water Volume & Pump Runtime CalculatorEstimate water sitting on the cover and how long your pump will need to remove it.
- Cover Pump Runtime CalculatorCalculate pump runtime from gallons to remove and the pump flow rating.
- Spring Opening Chemical PlannerOpening checklist + dosing guide
- Winter Closing Chemical PlannerClosing checklist + targets
Troubleshooting
- Evaporation Rate EstimatorEstimate evaporation in your conditions
- Leak Bucket Test TrackerTrack evaporation vs leak loss
Quick Tools
- Dose Splitter (Multiple Adds)Split a dose into multiple additions
- Gallons ↔ Liters ConverterConvert gallons and liters
- Ounces ↔ Pounds ↔ Grams ConverterCommon pool dosing units
- Percent Strength CalculatorAdjust doses for different strengths
Water Loss
- Pool Leak Cost CalculatorEstimate water and chemical cost from a pool leak
- Pool Evaporation Comparison by RegionCompare evaporation across regional climate profiles
- Pool Splash-Out CalculatorEstimate water lost from swimmers and active play
- Pool Autofill Water Usage CalculatorEstimate autofill use from flow and runtime
- Pool Autofill Failure HelperCheck common no-fill and overfill causes
- Pool Rain & Overflow Loss CalculatorEstimate rainfall gain and overflow loss
- Pool Wind Evaporation Impact EstimatorAdjust baseline evaporation for wind exposure
Seasonal Pool Care
- Spring Pool Startup Timeline PlannerPlan startup from water condition and equipment readiness
- Pool Freeze Protection Runtime HelperPlan cold-weather circulation from forecast conditions
- Pool Storm, Hurricane & Monsoon Recovery PlannerPrioritize cleanup after severe weather
- Pool Cover Snow Load CalculatorEstimate snow weight and cover load
- Pool Ice Expansion Risk HelperReview freeze expansion risks and protection
- Pool Leaf Volume CalculatorEstimate leaf volume and cleanup bags
- Pool Pollen Cleanup PlannerEstimate cleanup intensity from pollen load
Pool Safety
- Pool Chemical Storage & Shelf-Life HelperReview storage, container condition, and shelf-life information
- Pool Deck Slip Hazard ReminderFlag common deck slip-and-fall conditions
- VGB Drain Cover Compliance HelperOrganize drain-cover documentation and safety checks
- Pool Fence Height & Opening HelperCompare barrier dimensions with general guidance
- Pool Gate Swing & Latch Safety ReminderCheck gate direction, closing, latching, and access
- Pool Diving Depth Safety HelperFlag diving plans requiring professional verification
Pool Party
- Pool Party Budget CalculatorEstimate food, drink, supply, and contingency costs
- Pool Party Drinks, Ice & Cooler CalculatorEstimate drinks, ice, and cooler capacity
- Pool Party Food CalculatorEstimate servings and food budget
- Pool Party Seating, Umbrella & Shade PlannerEstimate extra seating and shade units
Backyard & Patio
- Poolside Paver CalculatorEstimate paver quantity with waste
- Pool Patio Area & Base CalculatorEstimate patio area and base material
- Poolside Fire Pit Block CalculatorEstimate circular fire-pit wall blocks
- Poolside Gravel & Drainage CalculatorEstimate gravel and review drainage, discharge, and containment risks
- Poolside Landscape Rock & Drainage CalculatorEstimate decorative rock while checking edging and containment
- Poolside Mulch & Drainage CalculatorEstimate mulch and review grading, runoff, and staining risks
- Poolside Sod & Drainage CalculatorEstimate sod and check irrigation runoff and soil saturation
- Poolside Deck Board CalculatorEstimate boards, waste, fasteners, gaps, and drainage
Commercial Pools
- Commercial Pool Bather Load PlannerEstimate planning load from entered local limits
- Commercial Pool Chemical Consumption CalculatorProject chemical consumption from daily use
- Commercial Pool ORP Adjustment HelperReview ORP with pH, disinfectant, and controller context
- Commercial Pool Health Department Log PlannerEstimate log entries and recordkeeping needs
- Hotel Pool Capacity PlannerEstimate capacity from entered local limits
- HOA Pool Capacity PlannerEstimate HOA pool capacity from facility limits
- Lifeguard Chair Coverage PlannerEstimate observation stations from entered coverage
- Commercial Pool Daily Log Sheet PlannerCalculate daily test and inspection log rows
- Commercial Pool Backwash Schedule HelperCompare pressure with the approved backwash trigger
- Commercial Pool Chemical Budget CalculatorEstimate seasonal chemical cost and contingency
Safety & Accuracy Disclaimer
Pool Toolkit provides estimates for educational purposes. Pool chemistry and dosing can vary by product strength, water conditions, circulation, testing method, and measurement error.
Always follow chemical labels, local codes, and manufacturer instructions. Wear proper PPE, never mix incompatible chemicals, and when in doubt dose smaller, circulate, retest, and adjust.