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Gravel, turf & concrete estimator
Area, volume, tonnes and whole bags or rolls for your project.
YOUR NUMBERSResults update as you type
Measured area20m²
Net volume1m³
Order volume incl. allowance1.1m³
Mass to order1.76tonnes
Whole bulk bags3bags
Method & assumptions
Rectangular area × depth. Depth converts centimetres to metres. Gravel density and bag size are supplier-specific; defaults are examples. Concrete output is ready-mix volume, not dry-mix bags. Allowance is applied once; structural design is not assessed.