CIVIL ENGINEERING & CONSTRUCTION
Use our free aggregate calculator to
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
m
m
mm
t/m³
%
kg
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.
Looking for more free construction and civil engineering tools and calculators?
Explore the CATSPARE.com Toolkit for drainage, earthworks, concrete, aggregates and other practical tools for engineers, contractors and groundworkers.
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