# All Pool Calculators v0.1

> Free browser-based pool planning calculators. Results are estimates; labels, tests, specifications, qualified professionals and local codes take priority.

## Main sections
- /pool-size-design/
- /pool-water-chemicals/
- /pool-equipment-energy/
- /pool-costs-planning/

## Calculator paths
- /pool-size-design/rectangular/ — Rectangular pool volume: Calculate the exact volume of any rectangular swimming pool in gallons, liters, or cubic feet. Instant results with fill time, water weight and cost.
- /pool-size-design/round/ — Round pool volume: Calculate the volume of a round or circular pool in gallons, liters, or cubic feet. Just enter diameter and depth for instant fill time, water.
- /pool-size-design/oval/ — Oval pool volume: Calculate the volume of an oval swimming pool in gallons, liters, or cubic feet. Enter length and width for instant fill time, water weight and cost.
- /pool-size-design/kidney/ — Kidney pool volume: Estimate the volume of a kidney-shaped pool in gallons, liters, or cubic feet. Enter both widths and length for instant fill time, water weight and.
- /pool-size-design/freeform/ — Freeform pool volume: Calculate the volume of a freeform or irregular pool from its surface area. Get gallons, liters, cubic feet, fill time, water weight and cost.
- /pool-size-design/l-shaped/ — L-shaped pool volume: Calculate the volume of an L-shaped pool in gallons, liters, or cubic feet. Enter both sections for instant total volume, fill time, water weight.
- /pool-water-chemicals/chlorine-dosage/ — Chlorine dosage: Calculate exactly how much chlorine to add to your pool to reach your target free chlorine. Supports liquid, cal-hypo, dichlor and trichlor with CYA.
- /pool-water-chemicals/shock-calculator/ — Shock treatment: Calculate how much shock your pool needs to clear chloramines, algae, or cloudy water. Sized by volume, current FC, and shock strength. Free and.
- /pool-water-chemicals/ph-adjustment/ — pH adjustment: Calculate how much muriatic acid, dry acid, or soda ash to add to raise or lower your pool pH to target. Sized to your volume. Free and instant. Free.
- /pool-water-chemicals/alkalinity-calculator/ — Alkalinity adjustment: Calculate how much baking soda to raise total alkalinity, or acid to lower it, to your target. Sized to your pool volume. Free and instant. Free.
- /pool-water-chemicals/calcium-hardness/ — Calcium hardness: Calculate how much calcium chloride to raise calcium hardness, or how much water to drain to lower it. Targets by pool surface type. Free and instant.
- /pool-water-chemicals/cya-calculator/ — CYA / stabilizer: Calculate how much stabilizer to add to reach your target CYA, or how much to drain to lower it, plus the minimum FC your CYA level requires. Free.
- /pool-water-chemicals/lsi-calculator/ — LSI calculator: Calculate your pool's Langelier Saturation Index from pH, temperature, calcium, alkalinity, and CYA. See if water is corrosive or scaling, and how.
- /pool-water-chemicals/salt-calculator/ — Salt level: Calculate how much salt to add to reach your SWG's target ppm, in pounds and 40 lb bags, or how much to drain if salt is too high. Free and instant.
- /pool-water-chemicals/breakpoint-chlorination/ — Breakpoint chlorination: Calculate combined chlorine (chloramines) from your total and free chlorine, then the breakpoint shock dose to eliminate it. Free and instant. Free.
- /pool-water-chemicals/bromine-dosage/ — Bromine dosage: Calculate how much bromine to add to a pool or spa to reach your target ppm, by product type. Ideal ranges for pools and hot tubs. Free and instant.
- /pool-water-chemicals/algaecide-dosage/ — Algaecide dosage: Calculate how much algaecide to add for maintenance or active treatment, by product type — polyquat, copper, and more. Sized to your pool. Free. Free.
- /pool-water-chemicals/clarifier-dosage/ — Clarifier dosage: Calculate how much clarifier or flocculant to add to clear cloudy pool water, scaled by cloudiness and pool size. Free and instant. Free to use.
- /pool-water-chemicals/phosphate-remover/ — Phosphate remover: Calculate how much phosphate remover to lower your pool phosphates to target, by product strength and pool size. Free and instant. Free to use online.
- /pool-water-chemicals/tds-calculator/ — TDS dilution: Calculate how much water to drain and refill to lower your pool's total dissolved solids to target. Shows drain percentage and projected TDS. Free.
- /pool-water-chemicals/borate-calculator/ — Borate dosage: Calculate how much borax or boric acid to reach your target borate level, plus the muriatic acid to offset borax's pH rise. Free and instant. Free.
- /pool-water-chemicals/hardness-conversion/ — Hardness conversion: Convert water hardness between ppm as CaCO3, grains per gallon, German °dH, French °fH, mg/L, and mmol/L. All units at once, instantly. Free. Free.
- /pool-water-chemicals/orp-chlorine/ — ORP vs chlorine: Estimate effective sanitizing power from an ORP millivolt reading, corrected for pH and temperature. Understand what your ORP controller is telling.
- /pool-water-chemicals/chlorine-demand/ — Chlorine demand: Measure your pool's chlorine demand from a dose-and-retest, then calculate the extra chlorine needed to satisfy it. Free and instant. Free to use.
- /pool-water-chemicals/annual-chemical-cost/ — Annual chemical cost: Estimate your total yearly pool chemical spend across chlorine, shock, balancers, and algaecide, with monthly average and cost per gallon. Free. Free.
- /pool-equipment-energy/pump-flow-rate/ — Pump flow rate: Calculate the pump flow rate (GPM) your pool needs to hit your daily turnover target in your chosen run hours. With pump HP guidance. Free and.
- /pool-equipment-energy/turnover-rate/ — Turnover rate: Calculate your pool's daily turnover rate and hours per turnover from pump flow and run hours, and check it against residential and commercial.
- /pool-equipment-energy/total-dynamic-head/ — Total dynamic head: Calculate your pool system's total dynamic head from pipe friction, fittings, filter loss, and static lift, with a component breakdown and pump.
- /pool-equipment-energy/pipe-friction-loss/ — Pipe friction loss: Calculate head loss from pipe friction by diameter, length, flow rate, and material using the Hazen-Williams method, plus water velocity check.
- /pool-equipment-energy/filter-runtime/ — Filter run time: Calculate how many hours a day to run your pool pump for proper turnover, plus annual run hours and a seasonal schedule suggestion. Free and.
- /pool-equipment-energy/pump-sizing/ — Pump sizing: Find the correct pump horsepower for your pool's flow rate and total dynamic head, with a single-speed vs variable-speed energy cost comparison. Free.
- /pool-equipment-energy/vsp-savings/ — VSP savings: Calculate annual energy savings and payback period from running a variable-speed pool pump at lower speed, using the affinity law. Free and instant.
- /pool-equipment-energy/backwash-volume/ — Backwash volume: Calculate how much water each filter backwash uses, plus monthly and annual water loss and cost for sand and DE filters. Free and instant. Free.
- /pool-equipment-energy/sand-filter-sizing/ — Sand filter sizing: Size a sand filter to your pump flow using the 15 GPM per square foot standard, with recommended tank size and sand quantity. Free and instant. Free.
- /pool-equipment-energy/cartridge-filter-sizing/ — Cartridge filter sizing: Size a cartridge filter to your pump flow using the 0.375 GPM per square foot standard, with recommended cartridge area and cleaning interval. Free.
- /pool-equipment-energy/de-filter-sizing/ — DE filter sizing: Size a diatomaceous earth (DE) filter to your pump flow using the 2 GPM per square foot standard, with filter size and DE charge amount. Free. Free.
- /pool-equipment-energy/pipe-sizing/ — Pipe sizing: Size pool plumbing to your flow rate and target velocity for suction, return, and main drain lines, with the right pipe diameter. Free and instant.
- /pool-equipment-energy/flow-velocity/ — Flow velocity: Calculate water velocity in pool pipe from flow rate and diameter in feet per second and m/s, with a safe-range check. Free and instant. Free to use.
- /pool-equipment-energy/btu-calculator/ — Heater BTU: Calculate the BTU per hour your pool heater needs to reach target temperature in your chosen time window, with a heater size recommendation. Free.
- /pool-equipment-energy/heat-pump-sizing/ — Heat pump sizing: Size a pool heat pump to your surface area, target temperature, and climate, with estimated COP and electricity draw. Free and instant. Free to use.
- /pool-equipment-energy/solar-heater-sizing/ — Solar heater sizing: Calculate how many solar collector panels you need to heat your pool, based on surface area and climate zone, with roof space required. Free and.
- /pool-equipment-energy/heating-cost/ — Heating cost: Calculate the cost to heat your pool by fuel type — natural gas, propane, electric resistance, or heat pump — from total BTU and your local rates.
- /pool-equipment-energy/heat-loss-rate/ — Heat loss rate: Calculate your pool's heat loss rate from evaporation, convection, and radiation, factoring wind and cover type, in BTU per hour and per day. Free.
- /pool-equipment-energy/heat-time-calculator/ — Time to heat: Calculate how long your pool heater takes to reach target temperature from its BTU rating, volume, and temperature rise, with a heat-loss buffer.
- /pool-equipment-energy/solar-cover-savings/ — Solar cover savings: Calculate the overnight heat a solar cover retains, the temperature drop it prevents, and the annual money saved, with payback period. Free and.
- /pool-equipment-energy/heater-comparison/ — Heater comparison: Compare the annual running cost of natural gas, propane, electric resistance, and heat pump pool heaters side by side from your heating demand and.
- /pool-equipment-energy/annual-energy-cost/ — Annual energy cost: Estimate your pool's total yearly energy cost from pump and heater usage, with the split between circulation and heating. Free and instant. Free.
- /pool-water-chemicals/evaporation-rate/ — Evaporation rate: Calculate your pool's daily, monthly, and yearly evaporation loss from temperature, humidity, and wind, with annual water cost. Free and instant.
- /pool-water-chemicals/bucket-test/ — Bucket test: Run the standard bucket test to detect a pool leak: enter the pool and bucket water drop and get the leak rate in gallons per day and a severity.
- /pool-water-chemicals/splash-out/ — Splash-out loss: Estimate how much water is lost to splash-out and swimmer carry-out by bather count, activity level, and swim days, with annual cost. Free and.
- /pool-water-chemicals/backwash-loss/ — Backwash loss: Calculate annual water lost to filter backwashing from rate, duration, and frequency, with the yearly cost. Free and instant. Free online; no account.
- /pool-water-chemicals/annual-water-cost/ — Annual water cost: Total your pool's yearly water loss across evaporation, splash-out, backwash, and leaks, with the annual cost and a breakdown by source. Free. Free.
- /pool-water-chemicals/leak-vs-evaporation/ — Leak vs evaporation: Compare your pool's observed daily water drop against expected evaporation from weather to judge leak probability and estimate the leak rate. Free.
- /pool-size-design/excavation-volume/ — Excavation volume: Calculate pool excavation in cubic yards and dump-truck loads, including working room, base over-dig, and soil expansion, with a hauling cost.
- /pool-size-design/concrete-shell/ — Concrete shell: Calculate the concrete needed for a pool shell from floor and wall area and shell thickness, in cubic yards, with weight and cost estimates. Free.
- /pool-size-design/rebar-calculator/ — Rebar quantity: Calculate rebar for a pool shell from surface area and grid spacing — linear feet, 20-foot sticks, and total weight by bar size, with cost. Free and.
- /pool-size-design/gunite-calculator/ — Gunite volume: Calculate gunite or shotcrete to order for a pool shell including rebound waste, with adjusted cubic yards and batch truck count. Free and instant.
- /pool-size-design/coping-calculator/ — Coping: Calculate pool coping perimeter, square footage, and cost for rectangular, round, oval, and freeform pools by coping width and material. Free and.
- /pool-size-design/decking-calculator/ — Decking: Calculate net pool deck square footage by subtracting the pool footprint from your patio area, with material quantity and cost by deck type. Free.
- /pool-size-design/plaster-calculator/ — Plaster / surface area: Calculate pool interior surface area to plaster from floor and wall area, with material cost by finish — white, quartz, pebble, or glass bead. Free.
- /pool-size-design/tile-calculator/ — Waterline tile: Calculate waterline tile square footage, tile count by tile size, and cost from your pool perimeter and tile band height. Free and instant. Free.
- /pool-size-design/fence-calculator/ — Pool fence: Calculate linear feet of pool fence and total cost to enclose your pool, including gates, by fence style, with safety-code height notes. Free and.
- /pool-size-design/berm-fill-calculator/ — Berm & fill dirt: Calculate cubic yards of fill dirt for a pool berm or raised area, with compaction factor, truckloads, and cost by fill type. Free and instant. Free.
- /pool-size-design/depth-profile/ — Depth profile / slope: Design your pool floor slope: calculate the grade, slope ratio, and depth at each interval from shallow to deep end, with diving-depth notes. Free.
- /pool-size-design/bather-load/ — Bather load: Calculate the maximum bather load for a commercial pool by surface area and type using MAHC square-feet-per-bather standards, with lifeguard count.
- /pool-size-design/turnover-rate/ — Commercial turnover: Calculate the required flow rate (GPM and GPH) to meet MAHC turnover standards for commercial pools by type, with pump sizing. Free and instant. Free.
- /pool-size-design/chemical-feed-rate/ — Chemical feed rate: Calculate the chlorine feed rate to meet bather demand on a commercial pool, in gallons or pounds per hour, with metering pump sizing. Free and.
- /pool-size-design/lifeguard-ratio/ — Lifeguard ratio: Calculate how many lifeguards and supervisors you need by active bather count, age group, and standard (YMCA, Red Cross, MAHC). Free and instant.
- /pool-size-design/disinfection-calculator/ — Disinfection / CT: Calculate chlorine contact time (CT) to inactivate Giardia, Crypto, and E. coli to target log reduction, with UV requirement flags. Free and.
- /pool-size-design/inspection-checklist/ — Inspection checklist: Check your commercial pool's chemistry and safety parameters against health-code pass/fail ranges for FC, pH, alkalinity, hardness, CYA, turnover.
- /pool-equipment-energy/breaker-sizing/ — Breaker sizing: Size the circuit breaker for a pool pump from motor HP and voltage using NEC full-load amps and the 125% continuous-load rule, with GFCI notes.
- /pool-equipment-energy/wire-gauge/ — Wire gauge: Calculate the correct wire gauge (AWG) for a pool circuit from amps, run length, and allowable voltage drop, checked against NEC ampacity. Free and.
- /pool-equipment-energy/voltage-drop/ — Voltage drop: Calculate voltage drop for a pool circuit from wire gauge, length, load amps, and conductor material, in volts and percent, with a compliance check.
- /pool-equipment-energy/total-load/ — Total electrical load: Add up the total electrical load of all your pool equipment — pump, heater, lights, salt cell, automation — in amps and kW, with annual kWh. Free.
- /pool-equipment-energy/waterfall-flow-rate/ — Waterfall flow rate: Calculate the GPM a pool waterfall needs by weir width and style — thin sheet, curtain, or cascade — with pump and pipe sizing. Free and instant.
- /pool-equipment-energy/deck-jet-calculator/ — Deck jet arc: Calculate total GPM and approximate arc distance for pool deck jets by jet count and flow per jet, with pump sizing. Free and instant. Free to use.
- /pool-equipment-energy/spillover-spa/ — Spillover spa: Calculate spillover spa flow from spillway width and style, plus total system GPM when sharing or separating from the pool pump. Free and instant.
- /pool-equipment-energy/fountain-pump/ — Fountain pump sizing: Size a pump for a pool fountain or water feature — bubbling rock, sheer descent, scupper, or laminar jet — by required GPM, head, and horsepower.
- /pool-water-chemicals/spa-volume/ — Spa volume: Calculate the volume of a spa or hot tub in gallons and liters by shape and fill level, with fill time and water weight. Free and instant. Free.
- /pool-water-chemicals/spa-chemical-dosage/ — Spa chemical dosage: Calculate precise spa chemical doses — chlorine, bromine, pH, alkalinity, calcium, shock — scaled for small spa volumes in teaspoons and ounces. Free.
- /pool-water-chemicals/spa-heating-time/ — Spa heating time: Calculate how long a spa takes to heat to target and the cost, by volume, temperature rise, and heater type, with a cover comparison. Free and.
- /pool-water-chemicals/spa-energy-cost/ — Spa energy cost: Estimate the monthly and annual energy cost of a hot tub from heater duty cycle, jet pump, circulation, and controller, with a cover-savings note.
- /pool-costs-planning/installation-cost/ — Installation cost: Estimate the cost to build a new pool by type (gunite, vinyl, fiberglass), size, region, and add-ons, with a low-to-high range and cost per square.
- /pool-costs-planning/annual-ownership-cost/ — Annual ownership: Estimate the true annual cost of owning a pool — chemicals, electricity, heating, water loss, and maintenance — with a monthly equivalent and 10-year.
- /pool-costs-planning/resurfacing-cost/ — Resurfacing cost: Estimate pool resurfacing cost by surface area, finish type (plaster, quartz, pebble), and region, including drain and prep costs. Free and instant.
- /pool-costs-planning/pool-roi/ — Pool ROI: Estimate the home-value increase from a pool against its install and ownership cost, with ROI percentage and break-even years by region and pool.
- /pool-costs-planning/chemical-annual-cost/ — Annual chemical cost: Budget your annual pool chemical spend from product prices and usage, with a DIY-versus-service comparison and seasonal starter-kit estimate. Free.
- /pool-costs-planning/renovation-cost/ — Renovation cost: Estimate pool renovation cost by selecting scope items — resurface, liner, pump, filter, heater, tile, coping, deck — with a low-to-high range by.
- /pool-costs-planning/monthly-maintenance/ — Monthly maintenance: Calculate your monthly pool maintenance cost for full service, chemical-only service, or self-maintained including the value of your time. Free and.
- /pool-costs-planning/above-vs-inground/ — Above vs in-ground: Compare the 10-year total cost of above-ground, in-ground vinyl, and in-ground concrete pools, including install, upkeep, lifespan, and value add.
- /pool-water-chemicals/winterization-chemicals/ — Winterization chemicals: Calculate the exact closing chemicals to winterize your pool — winter shock, algaecide, stain preventer, and balancing doses — with a closing.
- /pool-water-chemicals/glass-media-filter/ — Glass media conversion: Calculate how much glass filter media replaces your sand — about 80% of the weight — with bag count, cost, and the filtration and backwash benefits.
- /pool-water-chemicals/slam-calculator/ — SLAM protocol: Calculate your SLAM target free chlorine from CYA, the initial dose, expected duration by algae type, and the OCLT pass criteria to clear a green.
- /pool-water-chemicals/pool-opening/ — Pool opening: Calculate the chemicals to open your pool in spring based on winter condition and test results — balance, shock, and algaecide — with the right step.

## Audience paths
- /for/ — Pool calculators by role
- /for/pool-builders/ — Pool Calculators for Builders
- /for/cpo/ — Pool Calculators for CPOs and Service Technicians
- /for/property-managers/ — Pool Calculators for Property Managers
- /for/homeowners/ — Pool Calculators for Homeowners

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## Scope
94 calculators across four public pillars and 12 internal categories. All Pool Calculators is operated by Amit Madhra, an individual sole proprietor based in Agra, Uttar Pradesh, India.