Construction Calculator
Concrete Mix Ratio Calculator
Estimate cement, sand, gravel, water, cement bags, and batch quantities for common concrete mix ratios such as 1:2:3, 1:2:4, and custom mixes.
Best for
Small batches
Calculates
Cement + aggregate
Includes
Water estimate
Common mix ratios
Ratios are cement : sand : gravel by volume. Final strength depends on materials, water, curing, compaction, and project specifications.
Calculate concrete mix materials
Choose a common mix ratio or enter a custom cement:sand:gravel ratio to estimate cement bags, sand, gravel, water, and material cost.
Mix estimate
Estimated material cost
$170
$170 per cubic yard.
This calculator estimates small-batch material quantities. Concrete strength depends on material quality, moisture, water content, mixing, placement, compaction, curing, and project specifications.
For small concrete batches
Estimate cement, sand, gravel, and water when mixing concrete by volume instead of ordering ready-mix.
For material planning
Convert a target concrete volume into approximate cement bags, aggregate volume, and water requirements.
For jobsite checks
Use the ratio breakdown to sanity-check small-batch quantities for pads, posts, repairs, and non-engineered work.
Concrete mix ratio FAQs
What does 1:2:3 concrete mix mean?
It means 1 part cement, 2 parts sand, and 3 parts gravel by volume before water is added.
How much water should I add?
Water depends on material moisture, desired slump, and mix requirements. Add water gradually and avoid making the mix too wet.
Is 1:2:3 concrete good for all projects?
No. It is a common general-purpose ratio, but structural work, driveways, foundations, and code-regulated projects may require specified concrete strength.
Should I use ready-mix instead?
For larger pours or structural work, ready-mix is usually more consistent and easier to place than hand-mixed concrete.