Magnus dew or frost point by phase
Uses the Magnus formula as documented by KNMI: 611.2 Pa, with a/b = 17.62/243.12 over water and 22.46/272.62 over ice.
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Uses the Magnus formula as documented by KNMI: 611.2 Pa, with a/b = 17.62/243.12 over water and 22.46/272.62 over ice. The profile covers −40 to 35 °C over water and −40 to 0 °C over ice. At 0% relative humidity there is no finite dew point. Outside the profile the inverse is withheld. This is not a mold diagnosis.
Model, grammar and limits
es=611.2exp(aT/(b+T)); γ=ln(RH/100)+aT/(b+T); Td=bγ/(a−γ)
Numbers can have up to 48 characters, with a decimal point or e, and no thousands separators. Curves use 2 to 501 samples plus up to 16 section endpoints. Use up to 32 forces or sources and up to 16 sections. Springs take 1 to 20 periods with at least 8 samples per period; pendulum angles run from 0 to 179°. Magnus covers −40 to 35 °C over water and −40 to 0 °C over ice; relative humidity 0 to 100%, pressure 5 to 200 kPa, and vapor pressure must be below total pressure. Backup is limited to 1 MiB. Invalid, non-unique or unresolved data are rejected.
Results are numerical idealizations in SI units, shown with up to 10 digits; CSV keeps the numeric values and units. 9.80665 m/s² is the conventional standard g, not local gravity. Uncertainty in your inputs or the model is not estimated, and nothing here is a physical approval.
Calculation and backup stay in this browser. Workers stop after 15 seconds, or when you edit, reset or cancel. Inputs are never uploaded or stored. Input data, formulas and filenames are never sent. Only with your optional consent, Refentra sends aggregate counts of actions and outcomes, without input content.
Use the chosen model
- Model, grammar and limits
Uses the Magnus formula as documented by KNMI: 611.2 Pa, with a/b = 17.62/243.12 over water and 22.46/272.62 over ice. The profile covers −40 to 35 °C over water and −40 to 0 °C over ice. At 0% relative humidity there is no finite dew point. Outside the profile the inverse is withheld. This is not a mold diagnosis.
- Calculate
es=611.2exp(aT/(b+T)); γ=ln(RH/100)+aT/(b+T); Td=bγ/(a−γ). Numbers can have up to 48 characters, with a decimal point or e, and no thousands separators. Curves use 2 to 501 samples plus up to 16 section endpoints. Use up to 32 forces or sources and up to 16 sections. Springs take 1 to 20 periods with at least 8 samples per period; pendulum angles run from 0 to 179°. Magnus covers −40 to 35 °C over water and −40 to 0 °C over ice; relative humidity 0 to 100%, pressure 5 to 200 kPa, and vapor pressure must be below total pressure. Backup is limited to 1 MiB. Invalid, non-unique or unresolved data are rejected.
- Download CSV report
Results are numerical idealizations in SI units, shown with up to 10 digits; CSV keeps the numeric values and units. 9.80665 m/s² is the conventional standard g, not local gravity. Uncertainty in your inputs or the model is not estimated, and nothing here is a physical approval. Calculation and backup stay in this browser. Workers stop after 15 seconds, or when you edit, reset or cancel. Inputs are never uploaded or stored. Input data, formulas and filenames are never sent. Only with your optional consent, Refentra sends aggregate counts of actions and outcomes, without input content.
Model questions
Model, grammar and limits
Uses the Magnus formula as documented by KNMI: 611.2 Pa, with a/b = 17.62/243.12 over water and 22.46/272.62 over ice. The profile covers −40 to 35 °C over water and −40 to 0 °C over ice. At 0% relative humidity there is no finite dew point. Outside the profile the inverse is withheld. This is not a mold diagnosis. es=611.2exp(aT/(b+T)); γ=ln(RH/100)+aT/(b+T); Td=bγ/(a−γ)
Unit
Air temperature; Saturation surface; Relative humidity for selected phase (%); Curve sample count (1). Numbers can have up to 48 characters, with a decimal point or e, and no thousands separators. Curves use 2 to 501 samples plus up to 16 section endpoints. Use up to 32 forces or sources and up to 16 sections. Springs take 1 to 20 periods with at least 8 samples per period; pendulum angles run from 0 to 179°. Magnus covers −40 to 35 °C over water and −40 to 0 °C over ice; relative humidity 0 to 100%, pressure 5 to 200 kPa, and vapor pressure must be below total pressure. Backup is limited to 1 MiB. Invalid, non-unique or unresolved data are rejected.
Model results
Results are numerical idealizations in SI units, shown with up to 10 digits; CSV keeps the numeric values and units. 9.80665 m/s² is the conventional standard g, not local gravity. Uncertainty in your inputs or the model is not estimated, and nothing here is a physical approval.
Download input backup
Calculation and backup stay in this browser. Workers stop after 15 seconds, or when you edit, reset or cancel. Inputs are never uploaded or stored. Input data, formulas and filenames are never sent. Only with your optional consent, Refentra sends aggregate counts of actions and outcomes, without input content.