In this study, a dimensional analysis is used to predict the compressive behavior of lightweight concrete (LWC). The Buckingham pi theorem and Rayleigh’s method are used to predict the strength of LWC. In general practice, concrete’s constituent materials are cement, aggregate, mineral admixture, and water, which are used here to make the high-strength, lightweight concrete for this study. LWC can be developed in a way to yield a high-strength product. When the produced concrete fails to meet requirements, then remedial measures must be taken to rectify the problem. This failure is time-consuming, and it is expensive in that it wastes materials in the manufacturing of high-strength, lightweight concrete. By conducting a dimensional analysis and an experimental investigation using specific parameters, we can avoid failures and predict the strength of lightweight concrete. The outcomes of the dimensional analysis are then contrasted with the outcomes of the experiments to demonstrate how to predict outcomes via a method of analysis that is simple and sufficiently accurate.