QMix Designer

Preliminary concrete mix design calculator for estimating cement, water, sand, coarse aggregate, water-cement ratio, slump, batch quantities, moisture correction, and ACI-style / Eurocode EN 206 durability checks.

Concrete QA/QC calculator

QMix Designer

Estimate preliminary concrete proportions, batch quantities, water-cement ratio, moisture correction, and ACI-style / Eurocode EN 206 durability boundaries before final lab approval.

Mix design inputs

Use project specification values when available. Defaults are preliminary estimating assumptions.

Target compressive strength

MPa at specified age

Durability / exposure condition

Slump target

Nominal maximum aggregate size

Admixture condition

Batch / mixer capacity

m³ per batch

Advanced site corrections

Sand moisture / bulking correction

Field sand weight increases and batch water to add decreases by this correction.

Sand fineness modulus

Assumed air content

% by absolute volume

Coarse aggregate dry-rodded density

kg/m³

Aggregate specific gravity

Used for absolute volume calculation

✓

Ready to verify

Enter your site conditions and calculate a preliminary concrete batch estimate.

Design W/C —

Water demand —

Cement —

Dry ratio —

Absolute volume

1.00 unit yield

Water—

Cement—

Aggregates—

Air—

Yield recipe card

Per 1.00 m³

Material / note	Per unit	Batch
Calculate to display the material schedule.

Batch calculator modifier Set the mixer capacity to convert the recipe to your site batch.

QA/QC verification notes

Preliminary checks

ℹ️

Waiting for calculation Warnings will appear here after the mix estimate is calculated.

Ready to control the pour on site?

Download the Quollnet Concrete Pour Log & Batch Plant Inspection Checklist to track slump, temperature, delivery time, batch tickets, and cube/cylinder samples.

Download checklist

Engineering note: QMix Designer is a preliminary front-end calculator using editable ACI-style absolute-volume logic and Eurocode / EN 206 style durability boundaries. It does not replace the approved project specification, laboratory trial mixes, local code requirements, material certificates, or engineer approval.