Enter the Greenwich mean time (GMT) and the zone description (ZD) into the LMT Calculator. The calculator will evaluate the LMT. 

LMT Formula

The following two example problems outline the steps and information needed to calculate the LMT.



  • LMT is the LMT ( )
  • GMT is the Greenwich mean time (GMT) 
  • ZD is the zone description (ZD) 

To calculate LMT, add the GMT time to the zone description.

How to Calculate LMT?

The following steps outline how to calculate the LMT.

  1. First, determine the Greenwich mean time (GMT). 
  2. Next, determine the zone description (ZD). 
  3. Next, gather the formula from above = LMT= GMT + ZD.
  4. Finally, calculate the LMT.
  5. 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.

Greenwich mean time (GMT) = 7

zone description (ZD) = 6

LMT= GMT + ZD = ?