Concrete mix material estimator

Concrete Mix Calculator

Estimate cement bags, sand volume, gravel volume, waste, and rough material cost from a target concrete volume and a simple mix ratio. Use it for small non-engineered pours, repair batches, and planning calls before a supplier quote.

Units

Target concrete volume (yd³)Dry volume factor Cement parts Sand parts Gravel parts Cement bag yield (yd³)Waste / batch loss (%)Cost per cement bag ($)Sand cost per volume ($)Gravel cost per volume ($)

Cement bags to buy

Sand volume

Gravel volume

Rough cost

Concrete mix is not structural design

This calculator estimates ingredients from a simple parts ratio. Strength, slump, water-cement ratio, admixtures, reinforcement, exposure, code, and engineered mix design must be verified for slabs, footings, structural work, and inspected pours.

Android App

Need concrete mix cement, sand, and gravel estimates hands-free?

Use the Android app when you need voice input, offline use, material lists, or PDF export. Free, no ads, no accounts.

Get the Free App Free. Built for Android phones. Donations welcome.

Saved you a mistake? Support VibeCalc

Concrete Calculator

Get the slab, footing, or pad volume before choosing mix ingredients.

Sand Calculator

Estimate sand volume, tons, and bags as a separate supplier order.

Gravel Calculator

Estimate aggregate volume and tonnage for the same job.

View all

Concrete mix formula

Dry batch volume = target concrete volume × dry-volume factor × (1 + waste %)

Cement volume = dry batch volume × cement parts ÷ total parts

Sand volume = dry batch volume × sand parts ÷ total parts

Gravel volume = dry batch volume × gravel parts ÷ total parts

Cement bags = cement volume ÷ bag yield

Sample takeoff

For 1 yd³ of concrete at a 1:2:3 ratio, 1.54 dry-volume factor, 5% waste, and 0.035 yd³ cement-bag yield, plan about 8 cement bags, 0.54 yd³ of sand, and 0.81 yd³ of gravel.For 1 m³ of concrete at a 1:2:3 ratio, 1.54 dry-volume factor, 5% waste, and 0.017 m³ cement-bag yield, plan about 16 cement bags, 0.54 m³ of sand, and 0.81 m³ of gravel.

Concrete Mix Calculator FAQ

How do I calculate concrete mix quantities?+

Convert the target concrete volume into dry batch volume, split it by the ratio parts, then divide the cement volume by bag yield.Convert the target concrete volume into dry batch volume, split it by the ratio parts, then divide the cement volume by bag yield.

What does a 1:2:3 concrete mix mean?+

It is a simple parts ratio: one part cement, two parts sand, and three parts gravel by volume. The correct mix for structural work must come from the plan, supplier, or code requirements.It is a simple parts ratio: one part cement, two parts sand, and three parts gravel by volume. The correct mix for structural work must come from the plan, supplier, or code requirements.

Can this replace ready-mix design?+

No. Use it for planning small batches and material conversations only. Ordered concrete and inspected structural work need product data and engineered mix requirements.No. Use it for planning small batches and material conversations only. Ordered concrete and inspected structural work need product data and engineered mix requirements.