Pool & Spa Calculators
Essential calculators for pool and spa owners. Calculate chemical dosing, pool volume, pump sizing, heater BTU, filter requirements, and maintenance costs with precision.
Pool & Spa Hot Tub Chemical Calculator
Estimate sanitizer, pH correction, and alkalinity dosing requirements for hot tub and spa water maintenance.
Pool & Spa Pool Alkalinity Calculator
Calculate pool total alkalinity adjustments using sodium bicarbonate or acid-treatment estimates with staged dosing guidance for stable water balance.
Pool & Spa Pool Calcium Hardness Calculator
Estimate calcium chloride needed to raise calcium hardness and dilution percentage guidance when CH is above target.
Pool & Spa Pool Chlorine Calculator
Calculate chlorine needed for your pool. Determine liquid chlorine, granular chlorine, or tablet doses based on current and target free chlorine levels with cost comparison.
Pool & Spa Pool Chemical Dosing Calculator
Calculate chemical doses for pool water balance. Determine exact amounts of chlorine, pH adjusters, alkalinity increaser, and calcium hardness needed for perfect pool chemistry.
Pool & Spa Pool Cost Calculator
Estimate annual pool ownership cost across chemicals, energy, service, and repair reserve categories for budgeting and planning.
Pool & Spa Pool Equipment Sizing Calculator
Estimate pump flow, practical pump class, filter area, and heater BTU requirements for coordinated pool equipment sizing.
Pool & Spa Pool Cyanuric Acid Calculator
Estimate stabilizer additions for target CYA and dilution guidance for elevated cyanuric acid levels.
Pool & Spa Pool Filter Sizing Calculator
Estimate required filter area and recommended sizing for sand, cartridge, and DE pool filters using design flow and oversizing assumptions.
Pool & Spa Pool Heater BTU Calculator
Estimate required pool heater BTU/hr, fuel therm use, and heating cost from pool volume, temperature rise, and heat-up goals.
Pool & Spa Pool Opening Chemical Calculator
Estimate startup pool chemical doses for chlorine, pH, and alkalinity adjustments from current and target readings.
Pool & Spa Pool pH Calculator
Calculate muriatic acid or soda ash dosing to move pool pH from current reading to target range with alkalinity-aware estimates.
Pool & Spa Pool Plaster Startup Calculator
Estimate startup chemistry corrections for pH, alkalinity, calcium hardness, and stabilizer during new plaster curing.
Pool & Spa Pool Pump Sizing Calculator
Estimate required pool pump flow rate, hydraulic horsepower, and practical pump class from turnover goals and total dynamic head.
Pool & Spa Pool Salt Calculator
Calculate pool salt additions in pounds, kilograms, bag count, and estimated cost for saltwater chlorine generator salinity targets.
Pool & Spa Pool Turnover Rate Calculator
Calculate pool turnover hours, daily turnovers, and required GPM from volume, flow, runtime, and target circulation goals.
Pool & Spa Pool Volume Calculator
Calculate pool volume in gallons and liters for rectangular, oval, kidney, and circular pools. Essential for chemical dosing, equipment sizing, and maintenance planning.
Pool & Spa Pool Water Evaporation Calculator
Estimate pool evaporation loss in inches and gallons with monthly refill water cost projections.
Pool & Spa Pool Winterizing Chemical Calculator
Estimate pool closing chemical doses for winterizing, including shock, polyquat, and stain or scale treatment.
Pool & Spa Saltwater Pool Cell Runtime Calculator
Estimate required salt cell runtime and output settings from pool volume, daily chlorine demand, and generator capacity.
About Pool & Spa Calculators
Our pool and spa calculators help you maintain perfect water chemistry, size equipment correctly, and plan maintenance budgets with scientific precision. Whether you're calculating chlorine doses for shocking your pool, determining the right pump size for optimal circulation, sizing a heater for year-round swimming, or estimating annual maintenance costs, these tools eliminate the guesswork.
From DIY pool owners balancing their own water chemistry to professional service technicians managing multiple accounts, these calculators are designed to help you achieve crystal-clear water, efficient operation, and cost-effective maintenance. Get the right doses, perfect your equipment sizing, and maximize your pool or spa investment with data-driven tools.