Concrete Mix Design (Simplified)

Water-to-cement ratio interpolated from ACI 211-style curves; cement, coarse, fine aggregate per cubic yard.

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Formula and source

ACI 211 simplified: w/c ratio interpolated by target strength and exposure class; water content from aggregate size + slump; cement = water / w_c; aggregate proportions per ACI 211 absolute-volume method.

ACI 211.1 (Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete) by name.

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Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.