Eccentric Footing Pressure Calculator
Calculate eccentric footing pressure with transparent engineering inputs and the displayed formula.
Run deterministic checks for missing or mixed units, physical bounds, detectable out-of-range values and formula applicability. This is not an engineering approval or a complete code/compliance check.
Export the current calculation inputs and outputs with formula, assumptions, confirmed source credits, automated verification status, tool version and timestamp.
PROFENG Pro unlocks calculation-record exports. The calculation itself remains free.
PROFENG provides this tool for engineering screening and educational use. Check the calculation basis, units, physical assumptions, applicable standards, safety factors, equipment data and project-specific requirements before design, procurement or operation.
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Why use this eccentric footing pressure calculator?
Calculate eccentric footing pressure with transparent engineering inputs and the displayed formula. The displayed relationship is qmax = P/A(1+6e/B).
What this calculation does
This calculator determines approx. maximum pressure from vertical load, footing length, footing width b, eccentricity along b. Use it for preliminary structural and civil quantity checks, not as a substitute for a complete code-based design.
Formula and engineering variables
qmax = P/A(1+6e/B)
| Variable | Definition | Unit | Working guidance |
|---|---|---|---|
load | Vertical load | kN | Illustrative screening band: 0 to about 10,000 kN. This is not a design limit. |
length | Footing length | m | Illustrative screening band: 0 to about 30 m. This is not a design limit. |
width | Footing width B | m | Illustrative screening band: 0 to about 30 m. This is not a design limit. |
eccentricity | Eccentricity along B | m | Illustrative screening band: 0 to about 1 m. This is not a design limit. |
Ranges above are screening guidance or physical bounds where stated. They are not code limits or manufacturer ratings.
Calculated outputs
- Approx. maximum pressure (kPa): load/(length*width)*(1+6*eccentricity/width)
Worked example
- Vertical load (load) = 1,000 kN
- Footing length (length) = 3 m
- Footing width B (width) = 3 m
- Eccentricity along B (eccentricity) = 0.1 m
(1000)/((3)*(3))*(1+6*(0.1)/(3)) = 133.333 kPaApprox. maximum pressure: 133.333 kPaAssumptions
- Geometry, loads and material parameters correspond to the simplified model shown.
- Loads are applied in the manner implied by the equation and support conditions are idealized.
- Section properties and units are consistent.
Limitations
- Load combinations, second-order effects, connections, durability, geotechnical variability and local code requirements are outside simple screening equations unless explicitly included.
- A complete project design must check the governing structural, geotechnical or civil requirements.
- The footing is idealized as rigid with linear bearing-pressure distribution.
- For full compression without soil tension, eccentricity must remain within the kern, e ≤ B/6.
- The equation is a screening relationship and does not replace bearing-capacity, settlement or code checks.
- The displayed default values are a worked example only; replace them with traceable project or measurement data.
Formula source and acknowledgement
Relationship used: qmax = P/A (1 + 6e/B) for linear soil-contact pressure under one-axis eccentric loading.
The relationship used here follows Braja M. Das, Principles of Foundation Engineering 10th edition (2024 copyright; publication date 2023), Cengage.
Credit for the underlying method belongs to the cited author(s). PROFENG presents its own implementation and wording and is not affiliated with or endorsed by the authors or publishers.
Limits of use for this relationship
- The footing is idealized as rigid with linear bearing-pressure distribution.
- For full compression without soil tension, eccentricity must remain within the kern, e ≤ B/6.
- The equation is a screening relationship and does not replace bearing-capacity, settlement or code checks.
Read the PROFENG methodology for formula sourcing and automated checks →
How to use it
Start with the inputs shown above, review the assumptions or options, then generate the result. Where the tool creates a file, keep the original until you have opened and checked the downloaded output.
Frequently asked questions
What does Eccentric Footing Pressure Calculator calculate?
This calculator determines approx. maximum pressure from vertical load, footing length, footing width b, eccentricity along b. Use it for preliminary structural and civil quantity checks, not as a substitute for a complete code-based design.
What formula does Eccentric Footing Pressure Calculator use?
The calculator uses qmax = P/A(1+6e/B). Every input used by the implementation is listed in the variable table on this page.
How is the worked example for Eccentric Footing Pressure Calculator checked?
PROFENG substitutes the displayed default values into the implemented relationship and compares the result against automated verification cases where an independent verifier is available.
What assumptions matter most for Eccentric Footing Pressure Calculator?
Geometry, loads and material parameters correspond to the simplified model shown. Loads are applied in the manner implied by the equation and support conditions are idealized. Section properties and units are consistent.
Can I use this result for final design or procurement?
Use it as an engineering screening calculation. Final design, procurement, operation or compliance decisions require project-specific data and the applicable engineering method, standard or manufacturer information.
QA, changelog and corrections
Last QA update: 30 September 2026.
Automated verification passed – 30 September 2026 – six numerical cases checked, with dimensional checks, independent cross-checks for calculators, and unit round-trip checks for converters where applicable.
Changelog
30 September 2026 – source/indexation status, metadata and correction pathway reviewed. Engineering tools display the automated verification label only when they are inside the passing Part 3 verification scope.