How is compressive strength of concrete usually measured?

The compressive strength of concrete is typically measured in pounds per square inch (PSI). This unit reflects the amount of stress that concrete can withstand before failing under compression. Compressive strength is a key characteristic that indicates how well a concrete mix can support loads and is critical for construction and structural applications.

While other units like Pascals, megapascals (MPa), and bars are also used to measure pressure and strength in various contexts, PSI is widely recognized and utilized in the construction industry, particularly in the United States. The use of PSI gives contractors and builders a clear and practical understanding of the material's strength in terms that are commonly used in building codes and engineering practices.

In contrast, megapascals and bars are more prevalent in international contexts and specific engineering disciplines, which may explain their presence in the choices but do not make them the standard measure in this scenario.