Free calculators
Pool & spa calculators
Volume, chemistry, pumps, heating and pool service pricing.
27 calculators
Pool Volume
Works out pool volume, which every chemical dose and every piece of equipment sizing depends on..
Pool Gallons
Converts pool dimensions to gallons, the unit every chemical label uses..
Pool Water
Works out how much water a pool holds and what filling or topping it up involves..
Pool Pump Size
Sizes a pump from turnover rather than from horsepower, which is how it should be done..
Pool Heater Size
Sizes a gas heater from surface area and temperature rise, where the surface is where the heat goes..
Pool Heat Pump
Sizes a heat pump, which is efficient and slow and depends on air temperature..
Chlorine
Doses chlorine, where the pH and the stabiliser level decide how well it works..
Pool pH
Adjusts pH, the parameter that controls whether everything else works..
Pool Alkalinity
Adjusts total alkalinity, which is what stops pH swinging around..
Calcium Hardness
Adjusts calcium hardness, where too low eats the plaster and too high scales everything..
Pool CYA
Doses cyanuric acid, the one parameter you cannot bring back down with a chemical..
Pool Stabiliser
Doses stabiliser, which is cyanuric acid under its other name..
Pool Salt
Doses salt for a chlorine generator, where the cell needs a specific range to work..
Saltwater Pool
Works out a salt system conversion, which changes how the pool is maintained rather than removing chemistry..
Pool Shock
Doses a shock, where the point is reaching a threshold rather than adding a lot..
Pool Chemicals
Doses the main parameters together, which is how pool chemistry actually works..
Pump Electricity Cost
What the pump actually costs to run, worked from horsepower, a nameplate or a measured wattage, with the variable speed comparison that drives the decision..
Chemical Cost
What a season of chemicals costs, starting from the pool volume, which you can enter directly or have worked out from the shape..
Pool Repair Cost
Prices a pool heater installation, where the supply to it often costs as much as the unit..
Pool Repair Cost
Prices running a pool heater, where a cover changes the answer more than the heater does..
Pool Repair Cost
Prices pool maintenance, where the chemicals are the smaller half..
Pool Pricing
Prices pool service from cost upward, where route density decides profitability..
Pool Repair Cost
Builds a pool service quote, where the variable is time per stop..
Pool Repair Cost
Prices filter replacement, where the three filter types have completely different economics..
Pool Repair Cost
Prices a vinyl liner replacement, where the measurement is what makes it fit..
Pool Repair Cost
Prices resurfacing, where the startup in the first weeks determines how long it lasts..
Pool Repair Cost
Prices a new pool, where the barrier requirements are not optional and the site decides a lot..
Beyond the numbers
Tools that produce something you can send
Invoice Generator
Build a clean, itemised invoice and print it to PDF.
Open toolEstimate Generator
Turn a scope of work into a priced estimate the customer can approve.
Open toolWork Order Generator
Write the job down before the technician leaves: what, where, who, and what they need to take with them..
Open toolOther categories
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