About the Footing Sizing Estimator Online Free Tool

The Footing Sizing Estimator Online Free Tool calculates preliminary isolated footing area and suggested length and width from service load, allowable soil bearing capacity, L/B ratio, and self-weight allowance.

How to Use the Footing Sizing Estimator Online

1. Enter the service axial load, allowable soil bearing capacity, target L/B ratio, and self-weight allowance.
2. Run the calculation to get required footing area and suggested plan dimensions.
3. Review the check pressure against the allowable bearing value.
4. Use the result as a starting point for detailed footing design.

Choosing Options Correctly

L/B ratio:
Use 1 for a square footing or a larger value for a rectangular footing.

Self-weight allowance:
Add a percentage allowance for footing and overburden weight when the service load excludes it.

Common Use Cases

• Estimate isolated footing plan size during early design.
• Check how soil bearing capacity affects required area.
• Compare square and rectangular footing proportions.

Quick FAQ

What does this estimate?
It estimates footing area or dimensions from load and allowable bearing assumptions.

Does it check settlement?
No. Settlement, punching shear, bending, sliding, uplift, and reinforcement need separate checks.

Where should bearing capacity come from?
Use values from a geotechnical report or approved project criteria, not guesses.

Can this be used for final foundation design?
No. Final design needs geotechnical and structural verification.