Relative Strain Discomfort Index Calculator
DeclaredThomDI=T−.55(1−RH/100)(T−14.5),empiricaldescriptor not medicaldiscomfortdiagnosis. Actual independent units,calibration,measurement definitions/coverage and model applicability;not a climate forecast,causal determination,geodesy operation or safe travel/design approval.
Description
A temperature–humidity discomfort index summarizes a declared empirical combination of air temperature and relative humidity.
A temperature–humidity discomfort index summarizes a declared empirical combination of air temperature and relative humidity.1
This tool applies the Thom expression using humidity as a percentage; it does not assess an individual’s heat risk or select an exposure limit.
When to use Relative Strain Discomfort Index Calculator
Use this tool to apply the stated relative strain discomfort index calculator operation with an explicit input and unit basis.
How to use Relative Strain Discomfort Index Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualTemperatureC, actualRelativeHumidityPercent and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualTemperatureC | Temperature C. Units, ordering and applicable branch are specified in the algorithm. | number | required; finite; further conditions in the algorithm |
| actualRelativeHumidityPercent | Relative humidity as a percentage from 0 through 100. | number | required; finite; further conditions in the algorithm |
Require humidity from 0 to 100 percent and a finite Celsius temperature. Apply the expression directly without assigning a medical category or a universal comfort threshold.
DI = T − 0.55(1−RHpercent/100)(T−14.5) Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Thom index value under the declared Celsius and humidity convention. | number |
{
"input": {
"actualTemperatureC": 20,
"actualRelativeHumidityPercent": 100
},
"output": {
"result": {
"value": 20
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A returned boolean, signed difference or tied result follows the stated convention; an input error instead means the required input contract was not satisfied. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Saturation Vapor Pressure Tetens Calculator. Saturation vapor pressure is the equilibrium water-vapor pressure over a chosen surface at a given temperature.
For a related operation, use Dewpoint from RH and T Magnus Calculator. Dew point is the temperature at which air reaches saturation under the chosen vapor-pressure approximation.
References
Similar or alternative tools
- Saturation Vapor Pressure Tetens Calculator
Saturation vapor pressure is the equilibrium water-vapor pressure over a chosen surface at a given temperature.
- Dewpoint from RH and T Magnus Calculator
Dew point is the temperature at which air reaches saturation under the chosen vapor-pressure approximation.