The Rebar Calculator contains equations and data used in working with reinforcement bars (rebar) in concrete slabs. The formulas calculate materials needed for rectangular, circular and irregular shaped slabs. ( ) .
The following are price estimates of rebar products based on the current market price of steel and a reasonable markup from raw steel to retail rebar product.
|Current Rebar Price Estimate (2022-10-04)|
|Rebar Size||20' Price||40' Price|
|3||$6.43 USD||$11.11 USD|
|4||$11.15 USD||$20.02 USD|
|5||$16.57 USD||$30.64 USD|
|6||$23.88 USD||$44.59 USD|
|8||$41.63 USD||$76.55 USD|
BN Products BNT-40X Rebar Tier
When the dimensions of your slab or wall exceed the length of a single piece of rebar, it is required topieces to create the added length. This is called Lapping, and the length of the overlapping rebar is the Lapping Length. There are a few considerations. First, the length of the lap is specified by a "Lapping Factor (LF)" which is often 40 times the diameter of the rebar. 60 is also a common factor, but the engineering specifications should always be applied. See these YouTube videos to better understand rebar lap:
The typical length of pre-cut rebar is 40' and 60' in the United States.
The Rebar in a Wall function also computes the size of the forms. Concrete forms are a vital part of construction. The Form Area of Concrete Wall function in this calculator helps compute the amount of plywood or OSB needed to construct the forms. It give you the choice of specifying whether you want to compute:
The term rebar is short for reinforcement bars, and refers to bars of steel embedded in concrete to improve tensile strength.
The Rebar Calculator is now available in Spanish. It has Spanish language descriptions, labels and diagrams and it also has default units in the metric system (SI). The lengths are in meters and centimeters, the areas are in square meters, the volumes are in cubic meters, and the weights are in kilograms and metric tons.