The reversible logic has been proved to play an important role in the low power VLSI design arena and the quantum dot cellular automata. The reversible circuits are building blocks of quantum computers since the operations involved in this are reversible. This paper proposes a novel 4∗4 reversible gate called BKG gate. The most significant feature of the proposed gate is that it can be operated singly as a reversible full adder. This feature is proved to be helpful in designing complex adder architectures using lesser number of reversible gates and lower area. The validation is done using comparison with existing reversible gates. © 2016 IEEE.