FourNineFour Rule Calculator

The FourNineFour Rule Calculator can be used to estimate the amount of concrete needed for a footing or other structural elements.

Input Parameters

Calculation Results

Calculation Formula

Concrete needed (cubic yards) = (Length x Width x Depth) / 27

Where:
Length: Length of the footing in feet
Width: Width of the footing in feet
Depth: Depth of the footing in feet
27: Number of cubic feet in a cubic yard

FourNineFour Rule Calculator Calculator Usage Guide

Learn how to use the FourNineFour Rule Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the length, width, and depth of the footing in feet.
  2. Click the "Calculate" button to estimate the amount of concrete needed.
  3. The result will be displayed in cubic yards.

Understanding the FourNineFour Rule

The FourNineFour Rule is a simplified method to estimate the volume of concrete needed for a footing. It works by multiplying the length, width, and depth of the footing in feet, and then dividing the result by 27 (since there are 27 cubic feet in a cubic yard).

Example Calculation

If you have a footing that is 6 feet long, 4 feet wide, and 4 inches deep, the calculation would be:

Volume (cubic feet) = 6 ft * 4 ft * 0.33 ft = 7.92 cubic feet

Volume (cubic yards) = 7.92 / 27 ≈ 0.29 cubic yards