Calculateur de point de rosée
Calculate dew point, relative humidity, or temperature using the Magnus formula. Supports °C, °F, and K with comfort-level assessment.
Calculer
Choose a calculation type, enter your values, and click Calculate Now to see dew point results with comfort levels and step-by-step solutions.
Résultat
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Solution étape par étape
Guide d'utilisation complet
Qu’est-ce que le point de rosée ?
The dew point is the temperature at which air becomes saturated with water vapor and condensation starts to form. It is always less than or equal to the air temperature. Dew point is a better indicator of comfort than relative humidity alone, because it directly measures the amount of moisture in the air. This calculator uses the Magnus formula, widely used in meteorology and HVAC applications.
Formule Magnus
α = (A × T) / (B + T) + ln(RH / 100)
Td = (B × α) / (A − α)
Où A = 17,27, B = 237,7 °C, T = température (°C), HR = humidité relative (%), Td = point de rosée (°C)
4 Calculation Types
Point de rosée
Enter air temperature and relative humidity. Get dew point with comfort level.
Humidité relative
Entrez la température de l'air et le point de rosée. Obtenez l'humidité relative (%).
Température
Enter dew point and relative humidity. Get the air temperature.
Convertir des unités
Convert between °C, °F, and K.
Niveaux de confort du point de rosée
| Point de rosée (°C) | Niveau de confort | Description |
|---|---|---|
| < 10 | Sec | Very comfortable, dry air. |
| 10 – 16 | Confortable | Pleasant conditions. |
| 16 – 18 | Légèrement humide | Most people comfortable. |
| 18 – 21 | Humide | Some discomfort, sticky feeling. |
| 21 – 24 | Très humide | Uncomfortable, oppressive. |
| > 24 | Extrêmement humide | Dangerous, heat exhaustion risk. |
Remarques importantes
- Dew point is always ≤ air temperature.
- La formule Magnus est précise pour une température de -45 °C à 60 °C.
- Relative humidity must be between 0 % and 100 %.
- Dew point is a better comfort indicator than RH alone.