The paper put forward a Load Flow algorithm for radial distribution system to evaluate the losses which is the basic requirement of many power system operation, planning and control problem. The Backward Forward Sweep method is utilized with amendment in the line data handling. The proposed method utilizes BIBC and BCBV matrices to estimate the line flow and voltage drop to reduce the memory requirements. The Distributed Generations (DGs) are incorporated into the Distribution load flow program to study the impact of penetrations of DG for Distribution system. A program is written in MATLAB R2012. This is used to test the efficiency of the proposed algorithm on IEEE 33 bus system with and without DG. The result demonstrates the capability and simplicity of the algorithm. © Springer Science+Business Media Singapore 2017.