This document provides a concrete mix design calculation for M50 grade concrete. It includes the materials used, design stipulations, test data, target mean strength calculation, selection of water-cement ratio, and determination of cement, water, fine aggregate, and coarse aggregate quantities. Testing of the mix showed it was cohesive and homogeneous with a 120mm slump. Compressive strengths from cube testing exceeded the target strength at both 7 and 28 days.