Pools, HVAC & energy Calculators
Updated Formulas shown
Pool and aquarium volume, AC BTU sizing and electricity cost. Every calculator shows its formula and works on your phone at the job site.
Related calculators
- Pool Volume CalculatorCalculate pool gallons for rectangle, round, oval and kidney pools from length, width and shallow/deep depth, plus liters and chlorine dosing.
- Aquarium Volume CalculatorCalculate fish tank volume in gallons and liters from length, width and height in inches, plus water weight.
- BTU CalculatorFind the right air conditioner size in BTU for any room using the ENERGY STAR sizing chart, adjusted for sun, occupants and kitchens.
- Electricity Cost CalculatorCalculate the cost to run any appliance per day, month and year from its wattage, hours of use and your electricity rate.
- Pipe Volume CalculatorCalculate how many gallons a pipe holds from its inside diameter and length, with liters, cubic feet and water weight.
- Septic Tank Size CalculatorEstimate the minimum septic tank size for a home by number of bedrooms and garbage disposal use, based on common code minimums.
- Ceiling Fan Size CalculatorFind the right ceiling fan blade span for your room size, plus the downrod length for high ceilings.