# The Formula To Calculate Concrete Yardage

## Information about The Formula To Calculate Concrete Yardage The concrete calculator’s formula to work out cubic meters for a square or rectangular slab of concrete is (length x width x thickness) / 27. Convert all the numbers to feet before doing the calculation.

Below is a written formula for calculating the specific mileage for specific projects such as:

• Concrete slabs
• Round plates
• Concrete walls
• Foundations
• Pillars (square and round)
• Concrete steps
• Curbs and gutters

## Concrete calculator formula for floors and slabs How to use a formula to calculate concrete for a square concrete slab or a rectangular floor or slab.

It is measured with feet:

Concrete volume in cubic feet (ft3) = width x length x depth

(Depth is converted to feet by dividing inches / 12)

Total cubic meters (yd3) = volume in cubic feet (ft3) / 27

(27) is the number of cubic feet in 1 cubic meter of concrete.

Convert volume to cubic meters (M3)

Volume in cubic meters (M3) = volume in cubic feet (ft3) x 0.0283

EXAMPLE: 20 ‘X 20’ X 4 “SLAB

20 ‘x 20’ = 400 x 0.33 ‘= 132 cubic feet

132/27 = 4.89 cubic meters of concrete

132 x 0.0283 = 3.74 cubic meters of concrete

[Twenty seven (27) is the number of cubic feet in 1 yard of concrete 3x3x3]

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## Concrete calculator formula for a round slab The formula for calculating the length of concrete for a round slab is very different from the formula for a square slab. The square footage is calculated using pi and the diameter of the circle to determine the cubic meter.

Example: Diameter = 20 ‘(feet) and Depth = 4 “(inches)

The area in square feet is 3.14 x (20 ÷ 2) ², which is 3.14 x 100 = 314 square feet.

Volume in cubic feet = 0.33 x 314 = 103.62

Volume in cubic meters = 103.63 ÷ 27 = 3.84 cubic meters of concrete

Volume in cubic meters = 103.62 x 0.0283 = 2.93 cubic meters of concrete

## Calculator formula for a concrete wall Calculating the length of concrete for a wall uses the same formula as for a slab.

Example: Height = 8 ‘, Length = 40’, Thickness = 8 “

Convert wall thickness to feet: 8 ÷ 12 = 0.667 feet

Volume in cubic feet = 0.667 x 8 x 20 = 213.44 ft³

Volume in cubic yards = 213.44 ft³ ÷ 27 = 7.9 yd³

Volume in cubic meters = 213.44 ft³ x 0.0283 = 6.04 m³

## Formula for calculating concrete for a footer The calculation of the concrete length for a foundation is similar to that of a slab, you just usually have smaller units of measurement for the width.

Example: Width 18 “, Depth 8”, Length 50 ‘(convert inches to feet)

Volume in cubic feet = 1.5 x 0.66 x 50 = 49.5 cubic feet

Volume in cubic yards = 49.5 ÷ 27 = 1.83 cubic yards

Volume in cubic meters = 49.5 x 0.0283 = 1.4 cubic meters

## Concrete calculator formula for a square column The first step in calculating concrete for a square pillar is calculating the cubic feet of the pillar.

Example: Width = 2 ‘, Length = 3’ Height = 18 ‘

To get cubic feet, multiply 2 x 3 x 18, which is 108 cubic feet

To find cubic meters, divide 108 by 27, which is 4 yd³

To find cubic feet of concrete, multiply 108 cubic feet by 0.0283 = 3.05 M³

## Formula for calculating concrete for a round column The formula for calculating the concrete length for a round column corresponds to the formula above for the round slab. The difference is that the height of a column is usually much greater than that of a slab.

Example: diameter 3 ‘, height 30’

The area of ​​the circle in square feet is 3.14 x (3 ÷ 2) ² = 7.065 ft²

Volume in ft³ = 30 (H) x 7.065 (A) = 211.95 ft³

Volume in yd³ = 211.95 ft³ ÷ 27 = 7.85 yd³

Volume in m³ = 211.95 ft³ x 0.0283 = 5.99 m³ concrete

## How to calculate concrete for steps How to calculate the concrete distance for a series of concrete steps.

Example: Platform depth 3 ‘, width 6’, run 1 ‘, rise 8 “.

1. Calculate cubic feet for each step. In the example above, the first step is:

Running depth = 1 ‘x (rise height) 0.66’ x 1 (step # 1) x 6 (step width) = 3.96 ft³ for step # 1

2nd step is:

Running depth = 1 ‘x (rise height) 0.66’ x 2 (step # 2) x 6 (step width) = 7.92 ft³ for step # 2

Platform is:

Platform depth = 3 ‘x (rise height) 0.66 x 3 (total steps) x 6 (step width) = 35.64 ft³ for platform

Total cubic feet volume = 35.64 + 7.92 + 3.96 = 47.52 cubic feet

Cubic meter volume = 47.52 ft³ ÷ 27 = 1.76 yd³ concrete

Cubic meter volume = 47.52 ft³ x 0.0283 = 1.34 m³ concrete

## Formula for calculating concrete for curbs and gutters Using a formula to calculate the concrete length for the curb and gutter is very similar to the steps.

You divide it into sections and calculate for each section, then add the sections together.

Example: curb depth 6 “, curb height 6”, channel width 18 “, flag thickness 1 ‘, length 80’

(Convert all dimensions to feet) and calculate cubic feet for each section.

Curb = 0.5 x (0.5 + 1) x 80 = 60 cubic feet

Gutter = 1.5 x 1 x 80 = 120 cubic feet

Total for cubic feet = 180 cubic feet

Cubic Meters = Cubic Feet 180 ÷ 27 = 6.66 yd³ of concrete

Cubic meters = 180 cubic feet x 0.0283 = 5.09 m³ of concrete

You can use it to check yourself:

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