1 yd3 at 1:2:3
- Adjusted concrete
- 1.1 yd3
- Cement
- 4.95 ft3
- Sand
- 9.9 ft3
- Gravel
- 14.85 ft3
Concrete mix design depends on strength, moisture, aggregate size, additives, and code requirements. This is a planning estimate for simple batches.
Concrete Mix Calculator
Use this free concrete mix calculator to estimate cement bags, sand, and gravel from cubic yards, mix ratio, bag yield, and waste percent.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Convert cubic yards to cubic feet and add waste.
- Add the cement, sand, and gravel ratio parts.
- Split the adjusted volume by the ratio and round cement bags up.
How to use the concrete mix calculator
- Enter concrete volume, cement:sand:gravel ratio parts, cement bag yield, and waste percent.
- Press Estimate mix to see adjusted concrete volume plus cement, sand, gravel, and rounded cement bags.
- A 1:2:3 ratio means one part cement, two parts sand, and three parts gravel by volume.
- Concrete strength depends on water, aggregate, curing, additives, and product or engineering specs.
Common uses
Plan cement, sand, and gravel for small concrete batches.
Compare 1:2:3 and 1:2:4 style ratios.
Add waste before buying bagged materials.
Turn cubic yards into practical material quantities.
Examples
5 cement-bag cubic feet plus sand and gravel
Split material estimate
Updated material quantities
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Concrete Mix Calculator?
Use it when your task matches one of these common needs: Plan cement, sand, and gravel for small concrete batches. Compare 1:2:3 and 1:2:4 style ratios. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Concrete Mix Calculator doing with my inputs?
In plain language: The calculator converts cubic yards to cubic feet, adds waste, splits the adjusted volume by the cement:sand:gravel ratio, and rounds cement bags up. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What do the main Concrete Mix Calculator inputs mean?
Concrete volume: the final amount of concrete you want to make before waste is added. Mix ratio: cement, sand, and gravel parts, such as 1:2:3. Cement bag cubic feet: the approximate volume one cement bag contributes; use the bag or supplier label when available. Waste percent: extra material for spillage, uneven measuring, and small batch losses.
How should I read the Concrete Mix Calculator answer?
Read the headline estimate first, then check the material, waste, coverage, and unit lines. For project tools, the supporting lines are often the difference between a rough idea and a list you can actually shop from.
What should I double-check before trusting the answer?
Concrete strength depends on water, aggregate, cement type, moisture, additives, curing, and code requirements. This is a rough material planning tool, not a mix design. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
What does a 1:2:3 concrete mix mean?
It means 1 part cement, 2 parts sand, and 3 parts gravel by volume. The calculator uses those parts to split the total adjusted volume.
Can this guarantee concrete strength?
No. Strength depends on the actual mix design, water ratio, aggregate, curing, and product instructions. Use a specified mix for structural work.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
Related tools
Concrete Calculator Estimate concrete volume for a slab in cubic feet, cubic yards, and bags. Open Concrete Footing Calculator Estimate concrete volume and bag counts for straight rectangular footings. Open Cubic Yard Calculator Convert length, width, depth, and waste into cubic feet and cubic yards. Open