Need help in figuring out your material consumables? The Rebar Calculator contains equations and data specifically used in working with reinforcement bars (rebar) in concrete slabs. You’re able to choose the shape of your concrete slab, rebar size, number of rebar mats and even the inset and rebar spacing. Both weight and length are returned in feet and pounds, respectively, but can be easily converted to different metrics.

## Types of Calculators

Length of Rebar in a Grid: Computes the linear feet of rebar in one or more mats of rebar.

Weight of Rebar in a Grid: Computes the weight of rebar in one or more mats of rebar.

Weight of a Length of Rebar: Computes weight from a rebar size and any length.

Area of a Concrete Slab: Computes the area based on length and width of a rectangular slab.

Volume of a Concrete Slab: Compute the cubic yards of concrete needed for a slab.

Weight of a Concrete Slab: Computes the approximate weight of concrete in a slab.

Weight of Rebar Grid and Concrete Slab: Computes the combined slab and rebar weight.

Rebar – Irregular Shaped Slab: Estimates the amount of rebar in an irregular shaped slab.

Volume of a Circular Slab: Computes the cubic yards of concrete in a circular slab.

Wall – Rebar, Concrete and Forms: Computes the amount of rebar, concrete and material for forms needed for a concrete wall.

Rebar Lapping Length: Computes the length overlap needed at rebar joints based on the size of the rebar.

The Rebar Calculator also has concrete functions to help you compute:

- Surface Areas of slabs in square feet, yards and meters
- Volume of Concrete in slabs in cubic yards and meters
- Amount of plywood or OSB needed for wood forms for poured concrete walls