Rebar Calculator
Estimate reinforcement material from project dimensions and planned bar spacing.
How it works
Enter the area dimensions, choose a planning spacing, and allow for cutting and overlap waste. This produces an approximate material quantity, not a structural design.
Formula
Number of bars ≈ span ÷ spacing + 1. Total rebar length is then rounded for cuts, overlaps, and purchase lengths.
FAQ
Does this replace structural plans?
No. Rebar size, spacing, laps, cover, and structural requirements must come from project plans, local requirements, or a qualified professional.
Should I include waste?
Yes. Cutting and overlap requirements can increase the amount ordered, so keep the allowance editable.