Rebar Calculator
Calculate estimated rebar quantities and total linear footage for concrete slabs and other reinforcing projects.
How to Use the Rebar Calculator
Enter the length and width of your concrete area, choose the desired rebar spacing, and enter the standard length of the rebar you plan to use.
The calculator estimates the number of rebar runs in each direction and the total linear footage required. It also estimates how many standard-length bars may be required.
Example
For a 20 ft × 15 ft slab with rebar spaced 12 inches apart, the calculator estimates the number of bar runs required in each direction and the total amount of rebar needed.
Actual rebar requirements can vary based on structural plans, lap lengths, bends, supports, edge clearances, and local building requirements. Always follow the project plans and applicable building codes.