The calculator returns cubic metres, estimated tonnes and an equivalent whole-bag count.
Home & Construction calculator
Gravel Calculator
Measure the area and planned compacted depth, then add a waste allowance before ordering gravel.
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No account. Formula and assumptions are shown below.
Calculator inputs
Gravel quantity details
Formula & disclaimer
Volume = Length Γ Width Γ Depth; Order Weight = Volume Γ Density Γ (1 + Waste)
View assumptionsFormula reviewCalcs at Hand Editorial TeamVerified 31 August 2026 Β· automated checks included
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Resultβ
Projection
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Formula & details
Calculation
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How to read this result
Three useful checks, kept deliberately short.
An 8 m Γ 4 m area, 8 cm deep, using 1,600 kg/mΒ³ density and 10% waste: Convert depth to metres Β· Calculate compacted volume Β· Apply density and waste.
For irregular areas, split the project into simple shapes and add the estimates.
Formula and assumptions
Volume = Length Γ Width Γ Depth; Order Weight = Volume Γ Density Γ (1 + Waste)Bulk density varies by stone type, moisture, grading and compaction.
Keep in mind: Confirm bulk density, compaction and minimum delivery quantities with the material supplier.
Produced byCalcs at Hand Editorial Team
Last formula check31 August 2026
Review methodKnown examples + boundary cases
Editorial and correction policy β