CATSPARE.com Toolkit

Aggregate Calculator

Estimate the volume, weight and approximate number of bulk bags required for gravel, sand, ballast, limestone and other aggregates.

Enter the area and material

Length

Width

Compacted depth

Aggregate typeSelecting a material applies an editable typical density.

Material densityTypical loose or placed density — editable.

t/m³

Ordering allowance

Bulk bag weightCheck the supplier listing because bag weights vary.

Typical defaults: Material density and bag weight vary with grading, moisture and supplier. All assumptions can be edited before ordering.

Please enter dimensions and assumptions greater than zero.

Estimated results Live

Surface area—Length multiplied by width.

Net aggregate volume—Volume at the entered depth.

Net material weight—Based on the editable material density.

Suggested order quantity—Includes a 10% allowance.

Approximate bulk bags—Rounded up using 800 kg bags.

Enter the required dimensions to estimate aggregate quantities.

Planning estimate only: bulk density changes with aggregate type, grading, moisture and compaction. Confirm the supplied product, coverage and bag or loose-load weight with the merchant or quarry.

How the aggregate calculation works

Area = length × width

Volume = area × depth

Tonnes = volume × material density

Order quantity = tonnes × (1 + allowance)

Millimetre depth is converted to metres.
The bulk-bag figure is rounded up to a whole bag.
Split irregular areas into simple rectangles and add the totals.

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