DesignMix
PRELIMINARY PROPORTIONING

ACI PRC-211.1-22 Concrete Mixture Calculator

Build a transparent starting mixture for normal-density concrete from specified strength, slump, aggregate size, sand fineness modulus and measured material properties. The calculation trail shows where each starting value comes from and what still has to be verified by trial batches.

ACI PRC-211.1-22
Important: ACI 211.1 is a proportioning guide, not a project approval. Enter any maximum w/cm or minimum cementitious content only after checking the project specification and the ACI 318 edition adopted for the work. Exposure class is recorded below for context; it does not silently overwrite your limits.
Display units:
01

Design requirements

Use the project-specified values where available.

For air-entrained concrete, enter the target total air required by the project/adopted code. For non-air-entrained concrete, the calculator uses the guide's approximate entrapped-air starting value.

02

Measured material properties

Actual aggregate properties make the starting mixture more useful than a generic “psi recipe.”