Dewpoint from RH and T Magnus Calculator
Magnusliquidwaterdewpoint17.625/243.04,T−40…50C,0<RH≤1,no arbitrarydry0log/inferred saturationphase. Actual independent units,calibration,measurement definitions/coverage and model applicability;not a climate forecast,causal determination,geodesy operation or safe travel/design approval.
Description
Dew point is the temperature at which air reaches saturation under the chosen vapor-pressure approximation.
Dew point is the temperature at which air reaches saturation under the chosen vapor-pressure approximation.1
This calculator inverts a liquid-water Magnus expression and expects humidity as a fraction, not a percentage.
When to use Dewpoint from RH and T Magnus Calculator
Use this tool to apply the stated dewpoint from rh and t magnus calculator operation with an explicit input and unit basis.
How to use Dewpoint from RH and T Magnus Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualRelativeHumidityFraction, actualAirTemperatureC 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 |
|---|---|---|---|
| actualRelativeHumidityFraction | Relative humidity as a fraction strictly above 0 through 1. | number | required; finite; strictly positive; 0–1 inclusive; further conditions in the algorithm |
| actualAirTemperatureC | Air Temperature C. Units, ordering and applicable branch are specified in the algorithm. | number | required; finite; further conditions in the algorithm |
Require Celsius air temperature −40–50 inclusive and relative humidity strictly above zero through one. Compute γ using the natural logarithm and the stated constants, then solve for dew point; no ice branch or pressure correction is installed.
γ = ln(RHfraction)+17.625T/(243.04+T); Td = 243.04γ/(17.625−γ) Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Liquid-water Magnus dew point in °C. | number |
{
"input": {
"actualRelativeHumidityFraction": 1,
"actualAirTemperatureC": 20
},
"output": {
"result": {
"value": 20.000000000000004
}
}
}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 Relative Strain Discomfort Index Calculator. A temperature–humidity discomfort index summarizes a declared empirical combination of air temperature and relative humidity.
References
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Dewpoint from RH and T Magnus Calculator — tool.io
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.
- Relative Strain Discomfort Index Calculator
A temperature–humidity discomfort index summarizes a declared empirical combination of air temperature and relative humidity.