How do you mix concrete 1m3?

To mix 1 cubic meter of concrete, you'll need approximately 350-400 kg of cement, 700-800 kg of sand, and 1,100-1,200 kg of gravel, along with about 200-250 liters of water. First, combine the dry ingredients (cement, sand, and gravel) in a concrete mixer until evenly mixed. Then, gradually add water while mixing until you achieve a uniform, workable consistency. Ensure all materials are mixed thoroughly for optimal strength and durability.