PoolCareCalcs: The Crystal-Clear Figures for Every Lap and Splash
Meet the Calcs Family →

Know your water before you treat it.

28 free calculators for pool volume, salt, chlorine, shock, equipment sizing and hot tub & spa care — exact gallons, exact doses.

Browse All Tools
Underwater view of a swimmer gliding toward the pool steps in crystal-clear water

Browse by category

Beaker of blue liquid beside a graduated measuring cylinder

8 calculators

Volume

Gallons, liters, cubic feet & more

 Four color-graduated pool test kit vials showing chlorine, pH, and alkalinity results

4 calculators

Chemicals

Salt, chlorine, shock, pH & more

 Pool vacuum hose coiled beside a cleaning caddy at poolside

2 calculators

Equipment

Pump size, heater size & more

 Architectural site plan for a proposed building, with a ruler laid across it

2 calculators

Planning

Pool cost, size chart & more

 Close-up of bubbling turquoise spa water with an ocean view beyond

8 calculators

Hot Tub & Spa

Volume, chemicals, running cost & more

 Close-up of a vintage analog scale dial with numeric graduations

4 calculators

Converters

Cubic feet, gallons, liters, ppm & more

 Overhead view of a magnifying glass on a light blue background

7 finders

Finders

Salt or Chlorine, Pool Water Problem, In-Ground vs Above-Ground Pool, Pool Heater Type & more

Start here

Pool Volume Calculator

Enter your pool's shape and dimensions to get gallons, liters and cubic feet.

Pool Salt Calculator

Find out how many pounds (and 40 lb bags) of salt your saltwater pool needs.

Pool Chemical Calculator

Pick an adjustment -- chlorine, pH or alkalinity -- and get a dose for your pool's volume.

Pool Shock Calculator

Find how many pounds of shock your pool needs for maintenance or an algae treatment.

Pool Pump Size Calculator

Find the GPM your pool pump needs to turn over your whole pool in your target hours.

Hot Tub Chemical Calculator

Dose chlorine, bromine, pH or alkalinity for your spa's exact volume.

All PoolCareCalcs tools