Freezing Degree Days Calculator

Formula

The formula to calculate the Freezing Degree Days (FDD) is:

\[ \text{FDD} = (T_{\text{avg}} - 32) \times D \]

Where:

Freezing Degree Days (FDD): A measure used in various fields such as agriculture, meteorology, and construction to quantify the severity of freezing conditions over a period of time. It is calculated by taking the difference between the average daily temperature and the freezing point (32°F), and then multiplying this difference by the number of days. This metric helps in understanding the cumulative effect of freezing temperatures on crops, infrastructure, and other systems sensitive to cold weather.

Let's say the average daily temperature (T_avg) is 20°F and the number of days (D) is 10. Using the formula:

\[ \text{FDD} = (20 - 32) \times 10 = -120 \]

So, the freezing degree days (FDD) is -120.

Extended information about "Freezing-Degree-Days-FDD-Calculator"

Definition: Freezing degree days (FDD) are used to estimate the amount of freezing that occurs over a period of time.

Formula: \( \text{FDD} = \sum (\text{T}_{avg} - 32) \)

Example: \( \text{FDD} = (30 - 32) + (28 - 32) + (25 - 32) \)

Definition: Cooling degree days (CDD) are used to estimate the energy demand for cooling buildings.

Formula: \( \text{CDD} = \sum (\text{T}_{avg} - 65) \)

Example: \( \text{CDD} = (70 - 65) + (75 - 65) + (80 - 65) \)