Calculate Rebar for a Circular Concrete Slab
Use the BN Products-USA Circular Slab Rebar Calculator to estimate the total length and weight of reinforcing steel required for circular concrete slab construction.
This calculator helps contractors, concrete professionals, and construction estimators determine approximate rebar requirements based on slab radius, depth, rebar size, on-center spacing, lap factors, and the number of reinforcement mats.
Enter your project measurements into the calculator below to estimate the rebar materials needed for your circular concrete slab.
The Rebar in a Circular Shaped Slab calculator estimates the total length and weight of reinforcement bars (rebar) needed for a circular shaped concrete slab.
INSTRUCTIONS: Choose units and enter the following:
- (r) Radius of Circular Slab (e.g. 12 ft).
- (D) Depth of Slab (e.g. 6″)
- (i) Inset from the edge of the circular slab (e.g. 3 inches)
- (oC) on-center spacing of the rebar.
- (rS) Rebar Size
- (LF) Lapping Factor
- (M) Number of rebar mats
- (rL) un-cut Rebar Length
- (WL) Output choice: Choose rebar weight or length
Weight and Length of Rebar in a Circular Slab: The calculator returns the:
- Length of rebar in feet
- Weight rebar in pounds
- Surface Area of Slab in square feet
- Total Volume of the Slab in cubic yards
- Volume of Concrete in cubic yards
- Concrete Displaced by Rebar in cubic yards
However, these can be automatically converted to compatible units (e.g. meters or kilograms) via the pull-down menu.