Rebar Grid Calculator

Rebar quantity for gunite/shotcrete pool shell.

Pool length (ft)

Pool width (ft)

Shallow end depth (ft)

Deep end depth (ft)

Rebar size (#3, #4, #5)

Grid spacing (inches)

Lap splice length (in)

Tab to move between fields

Total rebar (linear ft)

2,308

Total weight (lbs)868

Total weight (tons)0.43

20-ft sticks needed116

Shell surface area (sq ft)968

Floor rebar (linear ft)945

Wall rebar (linear ft)1,153

How to Use This Calculator

Enter the pool interior length, width, shallow end depth, and deep end depth in feet.
Select rebar size: #3 (3/8 in, most common), #4 (1/2 in), or #5 (5/8 in for heavy construction).
Set the grid spacing in inches — 12 inches on center is the residential standard.
Set the lap splice length — typically 24 inches for #3 rebar.
Review Total Rebar (linear ft), Total Weight, and 20-ft Sticks Needed to order material.

How the result changes with Grid spacing (inches)

Pool length (ft): Interior length of the pool in feet.
Pool width (ft): Interior width of the pool in feet.
Shallow end depth (ft): Depth at the shallow end.
Deep end depth (ft): Depth at the deep end.
Rebar size (#3, #4, #5): #3 = 3/8 inch, #4 = 1/2 inch, #5 = 5/8 inch. #3 is most common for residential pools.
Grid spacing (inches): Center-to-center spacing of the rebar grid. 12 inches is standard for residential pools.
Lap splice length (in): Overlap length where bars are joined. Typically 24-30 bar diameters.

Total rebar (linear ft): Total linear feet of rebar including lap splice allowance.
Total weight (lbs): Total weight of rebar in pounds.
Total weight (tons): Total weight of rebar in US tons.
20-ft sticks needed: Number of standard 20-foot rebar sticks to order.
Shell surface area (sq ft): Total pool shell area (floor + walls).
Floor rebar (linear ft): Linear feet of rebar for the pool floor grid.
Wall rebar (linear ft): Linear feet of rebar for the pool wall grid.

Identify Input Parameters
4 parameters
Pool length (ft) = 30, Pool width (ft) = 15, Shallow end depth (ft) = 3.5, Deep end depth (ft) = 8 = 7 input(s) provided
Calculate Total rebar
Total rebar = subtotalLinearFt * lapSpliceFactor
2308 = 2308
Calculate Total weight
Total weight = totalLinearFt * barWeightPerFt
868 = 868
Calculate Total weight
Total weight = totalWeightLbs / 2000
0.43 = 0.43