The Rectangle Swimming Pool Water Capacity and Time to Fill calculator determines the water Volume Capacity (V) in gallons (gal.) of a rectangular pool given the Length (L), Width (W) and Depth (Dp) of the pool.  It also returns the approximate time to fill based on the garden hose flow rate. 

INSTRUCTIONS: Enter the following:

• (L) Length of the pool
• (W) Width of the pool.
• (wD) Depth of Water
• (FR) Hose Flow Rate

The Math / Science

This calculator determines the amount of water at a constant depth of a rectangular swimming pool, multiplying the volume in cubic feet times 7.5 gallons (gal.) because there are 7.5 gallons of water in 1 cubic foot. 

The formula for the capacity of an rectangular shaped pool is:

  `V = L*W*wD`

where:

• V = Water volume (capacity) of the pool
• L = Length of the pool
• W = Width of the pool
• wD = Depth of the pool

The time to fill the pool is based on the range of flow rate for garden hoses of between 9 gallons per minute to 17 gallons per minute.  A default of 12 gallons per minute is provided.  This should be used as an estimate.

Swimming Pool Calculators

• Water Capacity and Time to fill an Oval Swimming Pool
• Water Capacity and Time to fill a Round Swimming Pool
• Water Capacity and Time to fill a Rectangular Swimming Pool