Mat Foundation Pressure Calculator
Ideal uniform mat foundation averageq=N/A, not eccentric maximum/contact separation, bearing capacity or ground movement. Actual independently established compatible SI units/model context; conditional arithmetic, not code compliance, engineering design or safe operation approval.
Description
A uniform mat-pressure estimate divides vertical force by contact area.
A uniform mat-pressure estimate divides vertical force by contact area.1
This tool calculates signed average pressure without predicting eccentric peak pressure, separation or settlement.
When to use Mat Foundation Pressure Calculator
Use this tool to calculate signed average pressure without predicting eccentric peak pressure, separation or settlement.
How to use Mat Foundation Pressure Calculator and how it works
- Prepare actualVerticalFoundationForceNewtons, actualMatContactAreaSquareMeters, with the units, conventions and assumptions below.
- Enter the required fields and run Mat Foundation Pressure Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualVerticalFoundationForceNewtons | Actual Vertical Foundation Force Newtons. Use the units and matching context stated in the calculation below. | number | Required; finite; other constraints below |
| actualMatContactAreaSquareMeters | Actual Mat Contact Area Square Meters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Supply finite signed vertical force in newtons and positive loaded mat area in square meters. Return force/area in pascals, preserving sign. This is average pressure only, without eccentricity, contact loss or a soil-structure pressure distribution.
averagePressurePascals=verticalForceNewtons/matAreaSquareMeters Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Signed average mat contact pressure in pascals. | number |
{
"input": {
"actualVerticalFoundationForceNewtons": 10,
"actualMatContactAreaSquareMeters": 2
},
"output": {
"result": {
"value": 5
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Caisson Bearing Calculator for a complementary operation: Caisson bearing depends on soil, embedment, water and loading under an independently validated method.
Use Square Footing Size Calculator for a complementary operation: A square footing spreads a centered vertical force across its plan area.
References
-
Mat Foundation Pressure Calculator — tool.io
Similar or alternative tools
- Caisson Bearing Calculator
Caisson bearing depends on soil, embedment, water and loading under an independently validated method.
- Square Footing Size Calculator
A square footing spreads a centered vertical force across its plan area.