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Percent of Fall Calculator

Mar 22, 2024 | Blog

Enter the highest invert in feet, the lowest invert in feet, and the length of the pipe in feet. The inputs will accept decimals.

Details: The “Percent of Fall” is a crucial measurement in the construction and civil engineering industries, particularly relevant when installing pipelines or drainage systems. It represents the gradient or slope of a pipe, calculated as the vertical drop of the pipe over a specified horizontal distance. This measurement is vital for ensuring that gravity-assisted flow systems, like sewer or stormwater drainage pipes, function correctly, allowing fluids to flow efficiently without the risk of stagnation or backflow. A correct percent of fall ensures that the system is efficient, complies with local building codes, and prevents potential environmental or structural issues.

The Percent of Fall Calculator is a straightforward yet powerful tool designed to simplify the calculation of this essential metric. Users are prompted to input three key pieces of information: the highest invert level (the vertical height at the pipe’s start), the lowest invert level (the vertical height at the pipe’s end), and the length of the pipe—all in feet. These inputs can include decimal values to accommodate precise measurements. Upon entering these values and clicking the “Calculate” button, the calculator performs the operation

(Highest invertLowest invert)÷Length of pipe×100

, thereby providing the percent of fall as a percentage. This result helps professionals quickly determine the slope of their pipeline installation, ensuring it meets the necessary criteria for effective fluid flow and infrastructure reliability.