Infinity Edge Calculator

Catch basin sizing and pump requirements for vanishing edge.

Infinity edge length (ft)

Overflow depth (inches)

Pool volume (gallons)

Wind exposure (1=low, 2=med, 3=high)

Edge drop height (ft)

Tab to move between fields

Design flow rate (GPM)

232.4

Calm weir flow (GPM)186

Catch basin volume (gal)1,515

Catch basin footprint (sq ft)67.5

Edge pump (HP)2

Total dynamic head (ft)19.6

Calculated HP (exact)1.77

How to Use This Calculator

Enter the infinity edge length in feet — the total span of the vanishing edge.
Set the overflow depth in inches (the water sheet thickness over the edge; 3/8 inch is typical).
Enter the total pool volume in gallons for surge basin sizing.
Set wind exposure: 1 = sheltered courtyard, 2 = typical backyard, 3 = exposed hilltop or coastal.
Enter the edge drop height from the pool deck to the catch basin floor.
Review Design Flow Rate (GPM), Catch Basin Volume, and Edge Pump HP to specify equipment.

How the result changes with Overflow depth (inches)

Infinity edge length (ft): Length of the vanishing edge where water flows over.
Overflow depth (inches): Depth of water sheet flowing over the edge. Typically 1/4 to 1/2 inch for visual effect.
Pool volume (gallons): Total pool water volume for surge calculations.
Wind exposure (1=low, 2=med, 3=high): Wind exposure level. Hilltop or coastal = high; sheltered courtyard = low.
Edge drop height (ft): Vertical drop from the pool edge to the catch basin floor.

Design flow rate (GPM): Flow rate the edge pump must handle, including wind surge factor.
Calm weir flow (GPM): Flow rate over the edge under calm conditions.
Catch basin volume (gal): Minimum catch basin (surge tank) capacity in gallons.
Catch basin footprint (sq ft): Catch basin surface area assuming 3 ft depth.
Edge pump (HP): Recommended pump motor size (next standard size up).
Total dynamic head (ft): Total head the edge pump must overcome.
Calculated HP (exact): Exact calculated horsepower before rounding to standard size.

Identify Input Parameters
4 parameters
Infinity edge length (ft) = 25, Overflow depth (inches) = 0.375, Pool volume (gallons) = 15000, Wind exposure (1=low, 2=med, 3=high) = 2 = 5 input(s) provided
Calculate Design flow rate
Design flow rate = flowGPM * windFactor
232.4 = 232.4
Calculate Calm weir flow
Calm weir flow = flowCfs * 448.83
186 = 186
Calculate Catch basin volume
Catch basin volume = max(200, transitVolGal + surgeAllowanceGal + windSurgeGal)
1515 = 1515