Free Online Calculator for Isolated Footing Design – Square & Rectangular

In previous post, I explained the detailed design procedure of an isolated footing. You can read it here: Basic Design of Isolated Footing.

This post introduces the Isolated Footing Design Calculator, a powerful tool developed to assist civil engineers in designing square or rectangular isolated footings quickly and accurately. By entering key parameters such as vertical and horizontal loads, moments, soil bearing capacity, and concrete properties, the calculator automatically performs all essential design checks — including stability, eccentricity, bi-axial bearing pressure, shear, and reinforcement requirements.

Important Notes:

• The footing is concentric, meaning the column center coincides with the footing center.
• Only square and rectangular-shaped isolated footings are designed using this calculator.
• Eccentricity is kept less than L/6 to ensure the footing remains within the compression zone.
• The X and Z axes represent the horizontal plane, while Y is the vertical axis.
• For rectangular footings, X represents the longer dimension of the footing.

👉 Simply fill in the form and click “Calculate” to start designing your isolated footing instantly!

Isolated Footing Design Calculator

© 2025 Knowledge Sharing Platform. This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) .