Given that Manik is fourteenth from the right end in a row of 40 boys, we can calculate his position from the left end using the formula:
\[
\text{Position from left} = \text{Total boys} - \text{Position from right} + 1
\]
Substituting the given values:
\[
\text{Position from left} = 40 - 14 + 1 = 27.
\]
Thus, Manik's position from the left end is 27th.