Enter the normal daytime (hrs) into the Calculator. The calculator will evaluate the Half Day Time. 

Half Day Time Formula

HDT = NDT /2


  • HDT is the Half Day Time (hrs)
  • NDT is the normal daytime (hrs)

To calculate Half Day Time, simply divide the normal daytime hours by 2.

How to Calculate Half Day Time?

The following steps outline how to calculate the Half Day Time.

  1. First, determine the normal day time (hrs). 
  2. Next, gather the formula from above = HDT = NDT /2.
  3. Finally, calculate the Half Day Time.
  4. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

normal day time (hrs) = 8