Description
Convert signed matric head to pressure.
Soil bench and profile terms depend on geometry, reference origins, heat-capacity bases and sign conventions. A pressure, stress or strain is a limited measured/model quantity rather than a complete soil-strength, heat-transport or field-state assessment. Reference lines and physical coefficients are supplied rather than inferred.
Convert signed matric head to pressure.
When to use this tool
Use Soil Matric Head Pressure Factor when checking the stated soil geometry, thermal, mechanical or measurement convention.
How to use the tool and how it works
- Enter headMeters, density, gravity. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read pressurePa. Use the output convention below.
Convert signed matric head to pressure. Require positive density/gravity; pressurePa = headMeters*density*gravity.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| headMeters | Signed matric head in metres; pressurePa=density*gravity*headMeters. | Required. Finite number. |
| density | Mass or count divided by the explicitly stated volume/area basis; use compatible units. | Required. Finite number; strictly above 0. |
| gravity | Gravity | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| pressurePa | Pressure Pa | Required. Finite number. |
{
"input": {
"headMeters": -1,
"density": 1000,
"gravity": 9.81
},
"output": {
"pressurePa": -9810
}
}Limitations and assumptions
- Pa requires kg/m³ and m/s²; head sign/reference are supplied and no matric potential, pore geometry or actual soil water state is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated measurements and an appropriate complete soil/engineering model for material properties, field behavior or safe practical loading.
References
Similar or alternative tools
- Aquatic Sample Depth Pressure Reference
Return gauge and reference-adjusted water pressure.
- Capillary Rise Pore Radius Factor
Return ideal signed capillary-rise head.