Free calculator
Gravel Calculator
Estimate gravel volume, approximate weight and bags from area, depth and editable density.
Open calculator →Garden project hub
Gravel & aggregates
Gravel planning is a volume problem first and a weight problem only after density is known.
Use the right quantity tool
Calculators for gravel & aggregates
Measure a gravel area, choose depth, estimate volume and weight, then plan membrane and edging separately.
Free calculator
Weed Membrane Calculator
Calculate membrane strips and whole rolls from roll dimensions, overlap and layout orientation.
Open calculator →Free calculator
Garden Edging Calculator
Calculate linear edging for beds, circles, paths, gaps and multiple runs, then convert to pieces or rolls.
Open calculator →Free calculator
Garden Area Calculator
Measure lawns, beds and awkward garden shapes in square metres before moving into a material or planting calculator.
Open calculator →Before you order
Keep the project decisions separate from the arithmetic
Area × depth gives volume
Start with square metres and a chosen installed depth. That produces cubic metres or litres. If the supplier sells by weight, convert using the supplier density or a clearly labelled planning estimate.
Membrane is a sheet-layout job
The same ground area can feed the Weed Membrane Calculator, but roll overlap and strip orientation change the required running length. Nominal roll area alone can understate material.
Edging is linear
The perimeter or selected boundary gives edging length. It is not the same number as gravel area, even though both describe the same project.
Supporting guidance
Read the guide when the difficult part is choosing the input
Practical guide
How Deep Should Gravel Be?
Understand how a chosen gravel depth changes volume, weight and bag quantities for paths and decorative areas.
Read guide →Continue the project
Useful next routes
Move to the next quantity only when it describes a genuinely different part of the job.
Back to landscaping materialsSee paving, membrane, edging and sleeper routes together.Depth & volume referenceCompare the litre requirement at different selected depths.Measure an awkward areaSplit irregular gravel areas into zones before calculating volume.Planning paving instead?Use slab count and patio build-up tools rather than gravel quantity.