Reference tables

Look-up charts built from geometry and stable constants — pool gallons, shape multipliers, salt, chemical dosing and heat-up time.

Pool gallons by size and shapeHow many gallons common pool sizes hold, by shape — rectangular and round/above-ground at typical average depths.Pool shape volume multipliers (derivation)The 7.5 (rectangular) and 5.9 (round/oval) multipliers used to turn length × width × average depth into gallons, and where they come from.Salt chart: pounds by pool size and ppm increasePounds of pool salt needed to raise salinity by a given ppm for common pool volumes, from the 8.34 lb/gal solute math.Standard chemical dosing per 10,000 gallonsStandard dosing increments per 10,000 gallons: chlorine, baking soda (TA), stabilizer (CYA) and calcium chloride (CH).Heat-up time by heater size and temperature riseIdeal hours to raise a 20,000-gallon pool by 5–20 °F with 100k–400k BTU heaters, from mass × specific heat.