Aggregate Calculator(Aggregate Quantity, Weight & Volume)

Estimate coarse aggregate quantity and aggregate weight instantly from concrete mix ratio.

Calculate coarse aggregate quantity, aggregate volume, and aggregate weight for concrete, PCC, and construction works using mix ratio, aggregate part, dry volume factor, and wastage with results in m³, cft, kg, and tons.

🕒 Last updated: May 28, 2026

Aggregate Details & Inputs

Concrete Volume

Aggregate Size

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ℹ️Selecting aggregate size updates the default ratio, aggregate part, and bulk density.

Mix Ratio

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Aggregate Ratio Part

ℹ️For a 1:2:4 concrete ratio, the aggregate part is 4.

Dry Volume Factor

ℹ️Typical value is 1.54 for concrete and PCC aggregate estimation.

Bulk Density

ℹ️Used to estimate weight from calculated loose aggregate volume.

Wastage Allowance

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Theoretical Aggregate

0.88 m³

Aggregate Volume: 0.88 m³ (31.08 cft)

Aggregate Weight: 1364 kg (1.364 tons)

Density Used: 1550 kg/m³

Wet Volume: 1 m³

Dry Volume: 1.54 m³

Ratio Used: 1:2:4

Recommended Aggregate
(Including 5% Wastage)

0.924 m³

Aggregate Volume: 0.924 m³ (32.63 cft)

Aggregate Weight: 1432.2 kg (1.432 tons)

Rounded Order Volume: 1 m³

Rounded Order Weight: 1.5 tons

Aggregate Part: 4

Dry Volume Factor: 1.54

Assumption

Aggregate size = 20mm

Bulk density used = 1550 kg/m³

Actual weight varies by aggregate size, stone type, moisture, and compaction.

Approximate results for planning only. Verify with a professional.

What is the purpose of this Aggregate Calculator?

This Aggregate Calculator helps estimate coarse aggregate quantity, loose aggregate volume, and approximate aggregate weight for concrete and PCC works based on concrete volume, aggregate size, mix ratio, dry volume factor, bulk density, and wastage allowance.

It is useful for site engineers, contractors, estimators, masons, and homeowners who need a quick practical estimate before ordering 10mm, 20mm, or 40mm aggregate. The Aggregate Size selector applies practical default bulk densities while still allowing manual adjustment for local material conditions.

The calculator provides both volume and approximate weight because aggregate suppliers may quote material in cubic meters, cubic feet, truckloads, kilograms, or tons depending on local supply practice.

Use it during preliminary material planning, supplier quotation comparison, BOQ preparation, and construction quantity estimation for concrete, PCC, and related aggregate works.

Step-by-step aggregate quantity calculation method

Aggregate quantity calculation starts with the required wet concrete volume. The calculator converts wet volume into dry material volume, applies the selected mix ratio, calculates the aggregate share, and converts loose aggregate volume into approximate weight using bulk density.

Step 1 - Enter required concrete volume

Concrete volume is the finished wet concrete volume required for slabs, beams, columns, PCC, foundations, or other construction works. You can enter the value in m³, cubic feet, cubic yards, or liters.

Wet Volume = Required Concrete Volume

Step 2 - Convert wet volume to dry volume

Dry volume factor accounts for voids between aggregate particles, sand bulking, compaction, and practical site handling losses. For concrete and PCC estimation, a dry volume factor of 1.54 is commonly used.

Dry Volume = Wet Volume × Dry Volume Factor

Step 3 - Calculate aggregate share from mix ratio

The aggregate ratio part is divided by the total mix ratio parts to calculate the loose aggregate volume required for the selected concrete mix.

For a 1:2:4 concrete mix ratio:

Total Parts = 1 + 2 + 4 = 7

Aggregate Share = 4 / 7

Aggregate Volume = Aggregate Share × Dry Volume

Step 4 - Convert aggregate volume to approximate weight

Bulk density converts loose aggregate volume into approximate aggregate weight. The default density changes automatically when you select 10mm, 20mm, or 40mm aggregate, and it can be adjusted for local material conditions.

Aggregate Weight = Aggregate Volume × Bulk Density

Step 5 - Apply wastage allowance

Wastage allowance accounts for practical site losses during transport, unloading, storage, handling, and placement.

Final Quantity = Base Quantity × (1 + Wastage %)

Real-world aggregate calculation example

Suppose you need to calculate aggregate quantity for 1 m³ of concrete using a 1:2:4 mix ratio, aggregate ratio part 4,1.54 dry volume factor, 1550 kg/m³ bulk density, and 5% wastage allowance.

Step 1 - Identify wet concrete volume

The required finished concrete volume is 1 m³.

Wet Volume = 1 m³

Step 2 - Convert wet volume to dry volume

For concrete, a dry volume factor of 1.54 is commonly used for nominal aggregate quantity estimation.

Dry Volume = 1 × 1.54 = 1.54 m³

Step 3 - Calculate total mix parts

For a 1:2:4 concrete mix, the total parts are the sum of cement, sand, and aggregate.

Total Parts = 1 + 2 + 4 = 7

Step 4 - Calculate loose aggregate volume

Aggregate volume is calculated by multiplying dry volume by the aggregate share in the mix ratio.

Aggregate Volume = 4 / 7 × 1.54 = 0.88 m³

Step 5 - Convert aggregate volume to aggregate weight

Using a bulk density of 1550 kg/m³, the loose aggregate volume is converted into approximate aggregate weight.

Aggregate Weight = 0.88 × 1550 = 1364 kg

Step 6 - Add wastage allowance

A 5% wastage allowance is added for practical site handling, unloading, storage, and placement losses.

Final Aggregate Volume = 0.88 × 1.05 = 0.924 m³

Final Aggregate Weight = 1364 × 1.05 = 1432.2 kg

Final Aggregate Weight = 1.432 tons

Ordering suggestion: Round up based on supplier unit. In this example, plan around 1.0 m³ or 1.5 tons of aggregate.

Common aggregate size reference table

The following table shows commonly used coarse aggregate sizes, approximate loose bulk densities, typical construction applications, and nominal mix ratios used for concrete and PCC estimation.

Aggregate Size	Typical Bulk Density	Common Applications	Typical Concrete Ratio
10mm Aggregate	1600 kg/m³	Thin concrete sections, close reinforcement zones, precast work, and detailed RCC elements	1:2:4
20mm Aggregate	1550 kg/m³	General RCC works, slabs, beams, columns, foundations, and common concrete construction	1:2:4
40mm Aggregate	1500 kg/m³	PCC works, mass concrete, large foundations, road sub-base, and heavy concrete sections	1:3:6

Note: Actual aggregate density may vary depending on stone type, grading, moisture content, compaction condition, and local material source.

When should you use this calculator?

Use it when you know the concrete volume and need coarse aggregate quantity quickly.
Use it to compare 10mm, 20mm, and 40mm aggregate size assumptions.
Use it before requesting supplier quotations in m³, cft, or tons.
Use it for preliminary material budgeting for concrete and PCC work.

Limitations of this calculator

This is a nominal quantity estimator, not a laboratory concrete mix design.
Actual aggregate quantity can vary due to grading, moisture, compaction, voids, and batching accuracy.
Bulk density varies by stone type, shape, source, and moisture condition.
The calculator does not verify aggregate grading, strength, flakiness, elongation, or project specification compliance.
Structural concrete should follow approved drawings, mix design, and engineer guidance.

FAQ

This Aggregate Calculator estimates coarse aggregate quantity, loose aggregate volume, and approximate aggregate weight for concrete and PCC works in m³, cubic feet, kilograms, and tons.

The calculator supports 10mm, 20mm, and 40mm coarse aggregate estimation with practical default bulk density assumptions for each aggregate size.

For a 1:2:4 concrete mix ratio, the aggregate ratio part is 4 because aggregate occupies four parts out of seven total mix ratio parts.

Aggregate weight varies depending on stone type, grading, moisture content, particle shape, compaction condition, and local material source. The calculator uses bulk density to convert loose aggregate volume into approximate planning weight.

Use the aggregate size specified by your project drawings, mix design, or engineer recommendation. 20mm aggregate is commonly used for general RCC and concrete works, while 10mm and 40mm aggregate are used for specific construction applications.

Yes. Selecting 10mm, 20mm, or 40mm aggregate automatically applies a practical default bulk density, which can still be manually adjusted for local material conditions.

Yes. The calculator shows both theoretical aggregate quantity and recommended quantity after applying the selected wastage allowance percentage.

Yes. The calculator supports concrete volume input in m³, cubic feet (cft), cubic yards (yd³), and liters.

For a typical 1:2:4 concrete mix, approximately 0.88 m³ of loose coarse aggregate is commonly required for 1 cubic meter of concrete before wastage allowance.

Yes. The calculator converts loose aggregate volume into approximate aggregate weight in kilograms and tons using the selected bulk density.

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