Start with accurate measurements
Pool dimensions, average water depth and recent test results are useful starting points for many pool calculations. If you are unsure how to collect measurements, open the pool measurement guide first.
POOL CALCULATOR DIRECTORY
All Pool Calculators & Tools
Explore pool calculators and practical guides for common water-care, equipment, volume and cost questions. Choose a tool to learn what it covers and what information you may need.
ALL TOOLS
4 categoriesFind a calculator by topic
Choose from the interactive calculators and practical guides below. Each tool explains its purpose, the inputs it uses and the assumptions that can affect its estimate.
20 tools shown across all categories
POOL WATER CARE
View category →Water Chemistry
01
Pool Salt Calculator
Estimate how much salt may be needed to adjust your pool's salinity.
View tool guide →02
Pool Shock Calculator
Understand the information used to estimate a pool shock treatment.
View tool guide →03
Muriatic Acid Pool Calculator
Review the factors involved in estimating muriatic acid for pool water adjustment.
View tool guide →04
Pool Chlorine Calculator
See what goes into estimating a chlorine adjustment for pool water.
View tool guide →05
Pool pH Chart
A simple reference to help understand pool pH readings and their meaning.
View tool guide →06
Baking Soda Pool Calculator
Learn how pool volume and alkalinity readings relate to baking soda estimates.
View tool guide →07
Cyanuric Acid (CYA) / Stabilizer Calculator
Estimate cyanuric acid (CYA) needed to raise pool stabilizer to a target level, or estimate water replacement when CYA is too high.
View tool guide →08
Calcium Hardness Pool Calculator
Calculate how much calcium chloride to add to raise pool calcium hardness to your target level.
View tool guide →PUMPS & HEATERS
View category →Pool Equipment
01
Pool Pump Size Calculator
Estimate the pump flow rate your pool needs in GPM from its volume and target turnover time.
View tool guide →02
Pool Heater Size Calculator
Estimate the heater size your pool needs in BTU per hour from its volume, temperature rise and warm-up time.
View tool guide →03
Pool Pump Run Time Calculator
Work out how many hours your pool pump needs to run each day from pool volume, actual flow rate and turnovers.
View tool guide →POOL MEASUREMENTS
View category →Pool Volume
01
Pool Sand Calculator
Estimate pool sand for a base layer, or the number of filter sand bags your sand filter needs.
View tool guide →02
Pool Volume Calculator
Find out how many gallons or litres of water your pool holds from its shape, size and average depth.
View tool guide →03
24 ft Pool Gallons
Find how many gallons a 24 ft round pool holds from its average water depth, in US gallons and litres.
View tool guide →04
30 ft Round Pool Gallons
Find how many gallons a 30 ft round pool holds from its average water depth, in US gallons and litres.
View tool guide →05
How to Measure a Pool
A practical guide to measuring pool dimensions for volume and planning calculations.
View tool guide →06
Pool Surface Area Calculator
Find the water surface area of a swimming pool in square feet, square metres and square yards from its shape and inside dimensions.
View tool guide →POOL OWNERSHIP COSTS
View category →Pool Costs
01
Swimming Pool Heating Cost Calculator
Estimate what it costs to heat your pool with electric, heat pump, gas or propane from your pool size, temperatures and energy rate.
View tool guide →02
Pool Water Refill Calculator
Estimate the cost and time required to fill or top off your swimming pool with municipal or trucked water.
View tool guide →03
Pool Pump Electricity Cost Calculator
Calculate the daily, monthly, and annual electric bill of running your pool pump.
View tool guide →No matching tools found
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Use estimates carefully
Results depend on input accuracy, product concentration, equipment specifications and pool conditions. Follow relevant product labels and manufacturer instructions when making real-world decisions.