Reinforcement calculators

Rebar for slabs, footings, walls and columns — sticks, in-place and purchase length, weight and lap splices, then what the steel costs.

2 calculators live

Quantities

Rebar CalculatorWork out how many rebar sticks a slab, driveway, wall, footing or column/beam needs — in-place length, purchase length and weight — plus a lap-splice length check against the ACI 318 code floor.

Costs

Rebar Cost CalculatorEstimate what rebar costs by the linear foot, from a dated national price band for black or galvanized bar, with a same-size per-pound and per-ton conversion for four common sizes.

How these calculators work

Every page computes in full precision and rounds once, at the point you buy — a whole bag, a whole block, a supplier's delivery increment. Each constant lists the data sheet or standard it came from and the date it was checked, and each page's worked examples run in the test suite and on the page itself.

Also on this site: Concrete · Masonry