Preformed Plastic Concrete Footing Forms

The Preformed Plastic Concrete Footing Forms Calculator helps you determine the amount of concrete required to fill durable, pre-made plastic forms for creating reliable concrete footings. These preformed plastic forms are designed to streamline setting footings for structures such as decks, fences, and posts, providing consistent shapes and reducing the need for custom on-site forms. Benefits

Concrete Volume Accuracy: By entering the form dimensions, capacity, and number of forms, this calculator provides an accurate estimate of the concrete volume needed in cubic feet, cubic yards, and cubic metres.
Consistency and Structural Integrity: Using preformed plastic forms ensures that each footing is uniform, contributing to the structural stability of decks, fences, and other installations.
Labour and Time Savings: Pre-made forms eliminate the need for custom form construction on-site, while the calculator simplifies concrete ordering by providing the exact volume needed for each project.
Brand Model Concrete Volume
Bigfoot BF20 1.75 ft³
Bigfoot BFT10 2.18 ft³
Bigfoot BF24 2.50 ft³
Bigfoot BF28 3.25 ft³
Bigfoot BF36 6.0 ft³
SquareFoot SF-22 2.0 ft³
SquareFoot SF-28 4.5 ft³
SquareFoot SF-32 7.0 ft³
Redi Base 8" x 24" 2.0 ft³
Plastic Concrete Footing Form

Plastic Concrete Footing Forms Calculator

Capacity of Plastic Form ft³
Diameter of Concrete Tube Form in
Height of Concrete Tube Form ft in.
Number of Plastic Forms #
     

Amount of concrete needed:

Cubic Feet ft³
Cubic Yards yd³
Cubic Metres m³

Calculator

  1. enter the volume of your concrete form in cubic feet
  2. diameter of the tube in inches
  3. height of tube(s) in feet and inches (for multiple forms add all individual height sections together)
  4. number of forms used

Results

  1. amount of concrete needed in cubic feet
  2. concrete needed in cubic yards
  3. required concrete in cubic metres

Conversions
one cubic foot (ft³)= 0.037037037037037 cubic yards (yd³)
one cubic foot (ft³) = 0.028316846592 cubic metres (m³)
Formula and Example Calculation
Capacity of Plastic Form: 2 cubic feet
Diameter of Tube Form: 12 inches
Height of Tube Form: 3 feet 6 inches (3.5 feet)
Number of Forms: 4


Calculate the Volume of the Concrete Tube Form (Cylinder):
The volume of a cylinder (tube form) can be calculated using the formula:
Volume = π * (Diameter / 2)² * Height


Convert Diameter to Feet:
The diameter is given in inches, so we convert 12 inches to feet:
Diameter = 12 inches ÷ 12 = 1 foot


Calculate Radius:
The radius is half the diameter:
Radius = 1 foot ÷ 2 = 0.5 feet


Calculate Volume of Tube Form:
Volume = π * (0.5)² * 3.5
Volume = 3.1416 * 0.25 * 3.5 = 2.7489 cubic feet


Add Capacity of the Plastic Form:
Since each plastic form already has a capacity of 2 cubic feet, add this to the volume of the tube form.
Total Volume per Form = Plastic Form Capacity + Tube Volume
Total Volume per Form = 2 + 2.7489 = 4.7489 cubic feet


Multiply the total volume per form by the number of forms:
Total Concrete Volume = Total Volume per Form * Number of Forms 
Total Concrete Volume = 4.7489 * 4 = 19 cubic feet
19 * 0.037037037037037 = 0.704 cubic yards
19 * 0.028316846592 = 0.538 cubic metres
Results
Concrete Volume: 
Cubic Feet: 19 cubic feet
Cubic Yards: 0.7 cubic yards
Cubic Meters: 0.54 cubic metres

This tool simplifies concrete volume calculations, ensuring you order the right amount of concrete for your project, avoiding waste and additional costs.


When Ordering Concrete

This concrete calculator will help you in estimating the amount of concrete needed for your project. The amount given as needed, does not include any waste. It is recommended, depending on the job you are doing, to add anywhere from an extra 4% to 10% to your concrete order to make sure you have enough concrete to finish the job. Ask when ordering the concrete. They will be able to give you a good idea of what is needed.

Concrete Volume Calculators

Estimate the amount of ready-mix concrete needed.
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