## How to calculate compressive strength of concrete?

after curg period of 3,7,28 days test under compressive testg mache.then caclculate result by usg formula Compressive strength =load newton/Area of cube mm2 (150x150) generally compressive testg mache shows load Kilonewton so we required Kilonewton convert to the Newton.by multiplyg kN X 1000 (1N = 1000 kN) e.g.