Dew Point Calculator
Calculate dew point temperature from air temperature and relative humidity using meteorological formulas.
Dew Point Calculator
Most accurate for typical weather conditions
Dew Point Results
Celsius
12°C
Fahrenheit
53.6°F
Kelvin
285.1K
Comfort Assessment
Dry
Comfortable for most people
Additional Properties
Absolute Humidity:10.6 g/m³
Relative Humidity at Different Temperatures
15°C
100%
20°C
60%
25°C
2658%
30°C
1986%
Formula Used
Magnus-Tetens Formula:
α = (17.27 × T)/(237.7 + T) + ln(RH/100)
Td = (237.7 × α)/(17.27 - α)
Where T = temperature (°C), RH = relative humidity (%), Td = dew point (°C)
What is Dew Point Calculator?
Understanding Dew Point
Dew point is the temperature at which air becomes saturated with water vapor and dew begins to form. It's a crucial measurement for understanding comfort levels, weather prediction, and various industrial applications.
Key Concepts
- Saturation: When air can hold no more water vapor at a given temperature
- Condensation: Water vapor turns to liquid when air cools to dew point
- Comfort: Dew point affects how humid air feels to humans
- Weather: Dew point helps predict fog, precipitation, and storm development
Dew Point Comfort Scale
Below 10°C (50°F): Very dry, may cause skin irritation
10-13°C (50-55°F): Comfortable for most people
13-16°C (55-61°F): Pleasant conditions
16-18°C (61-64°F): Still comfortable
18-21°C (64-70°F): Becoming humid
21-24°C (70-75°F): Oppressive
Above 26°C (79°F): Extremely oppressive
Calculation Methods
- Magnus-Tetens Formula: Most accurate for typical weather conditions (-45°C to 60°C)
- Antoine Equation: Alternative method useful for comparison and validation
- Accuracy: Both methods typically accurate within ±0.4°C for normal conditions
FAQ - Dew Point Calculator
Relative humidity is a percentage that shows how much water vapor is in the air compared to the maximum it can hold at that temperature. Dew point is the actual temperature at which condensation occurs. Dew point is often more useful because it doesn't change with temperature fluctuations throughout the day.