Concrete Mix Calculator
Estimate concrete mix ratios, cement, sand, gravel and water for small batches or planning-level mix design checks.
Estimate a concrete mix ratio
English concrete-mix intent splits into two jobs: a simple batch recipe for small mixers and a planning-level mix design check for cement, aggregate and water-cement ratio. Structural concrete still needs a specified mix from a qualified supplier or engineer.
Lower water-cement ratio generally increases strength but can reduce workability.
Small-batch mode scales cement, sand, gravel and water by bucket volume.
Limits of a ratio calculator
- Aggregate gradation, moisture, admixtures, air entrainment and curing change real performance.
- Driveways, slabs, foundations and structural members may need specified compressive strength and inspection.
- Always follow the bagged-mix label or ready-mix supplier specification for critical work.
Frequently Asked Questions
Sources and References
- Concrete Mix DesignAmerican Concrete Institute
- Concrete Mix Design BasicsPortland Cement Association
- Concrete Mix Ratio CalculatorInch Calculator
- Concrete Mix RatioConcrete Network
Calculations are based on the listed reference sources. Links open in a new tab.
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