# Rebar Calculator - Slab, Driveway or Patio

Calculate the amount of rebar reinforcement needed for slabs and drive ways.

The grid is the horizontal and vertical spacing of your rebar. It assumed in this calculator that they are the same.

#### The Calculation

- Enter the length. (feet + inches)
- Enter the width. (feet + inches)
- Enter the grid spacing. (inches)
- Enter the required splice (overlap) of your bars. (inches)
- Enter a waste factor, if required. (percentage)

#### The Results

- Amount of rebar needed in lineal feet.
- the amount the waste factor will add in lineal feet.
- lineal feet of rebar plus the amount of waste.
- the amount of result 3 divided by 20.

##### Rebar and Concrete Reinforcement

Rebar - Footings and Foundation WallRebar - Slab, Driveway or Patio

Slab using custom cut length Rebar

Canadian Rebar Weight

European Rebar Weight

American Rebar Weight

##### Concrete using Concrete Mix

Bags Needed for a ColumnBags Needed for a Column and Pad

Bags Needed for Footings

Bags Needed for a Foundation Wall

Bags Needed for a Slab

Volume and Cost

##### Concrete Weight

Pounds per Cubic Yards / Pounds per Cubic FootKilos per Cubic Metre

##### Concrete Volume and Cost

Cubic YardsCubic Metres

##### Conversion

Mass / Volume ConversionConvert Cubic Feet to Cubic Yards and Metres