Lightweight concrete (LWC) is a type of concrete with a density lower than traditional concrete typically in the range of 1400–2000 kg/m3.LWC can reduce the dead load on structures leading to lower material costs and improved structural efficiency. To make concrete lightweight, lightweight expanded clay (LECA) is used as the partial replacement of coarse aggregate. Cement content contributes to high carbon emissions and also leads to greenhouse gas emissions. To reduce the problem low cement concept is introduced. Cement is partially replaced with two materials, namely, silica fume and limestone powder. Compressive strengths and densities of LWC with different combinations were compared. For the experimental work, LECA is used in varying percentages of 70, 60, 50, and 40%. The percentage variations used for silica fume (SF) and limestone powder (LP) combinations are 35 & 5%, 25 & 5%, and 15 & 5% respectively. Compressive strength tests and density were conducted over 28 days. 40% of LECA shows better compressive strength and density than other percentages. This obtained percentage of LECA is used for cement replacement. Comparing the compressive strength of varying percentages of (SF) and (LP) 15% LP and 5% SF shows better results. After comparing the compressive strengths, the one with the highest value was suggested for low cement LWC.