Dew Point Calculator

Calculate the dew point based on temperature and relative humidity, for free with this calculator.

Required Information

Result:

What is Dew Point?

Dew point is the temperature that the air must reach for it to be completely saturated with water, effectively making it 100% humid. At this point, it will likely rain or become very foggy.

How to Calculate Dew Point

Calculating dew point can be done with the following equation that is called the Magnus formula:

Magnus Formula:

Td = (b × α(T, RH)) / (a - α(T, RH))

where α(T, RH) = a × (T / (b + T)) + ln(RH / 100)

Constants:

  • a: 17.27
  • b: 237.7

How to Use the Dew Point Calculator

  1. Enter the temperature, as well as changing the measurement type to the correct unit.

  2. Enter the humidity percentage. Do not enter the percent symbol, the number itself is all that is needed. For example, just entering 5 will do the job.

  3. Hit calculate and get your results instantly!

Dew Point - Frequently Asked Questions

Dew point is the temperature at which the air becomes saturated with water favor where humidity is the percent of the air that is current full of water. If it is more humid out it means the air is holding onto more water currently, which can make it feel muggy and sticky out. Low humidity makes it feel very dry out.

Yes, there is a chance that dew point can be a temperature than is lower than 0.

The highest dew point ever recorded was 95°F in Saudi Arabia, back in 2003 where it was 108°F at the time.

Create Date: July 17, 2024

Last Modified Date: July 17, 2024