Savnik,

Your problem has been bugging me, I like math puzzles, and the post by Pic_User did clear things up.

Now if I understand your table correctly, POWER column is the reading you want and the VOLT column is the value you now have. If this is correct, then keep reading, if not than ...

This is the formula:

Step #1:

D = (VOLTS / 10) * 0.2 'D' is a dummy variable

Step #2:

POWER = VOLTS * D

This give an answer within .1 of the value in the power column.

Hope this helps.