Garden & outdoor: calculators
Gravel Calculator, Sand Calculator, Crushed Stone Calculator, Topsoil Calculator, Mulch Calculator.
Gravel Calculator
Calculate gravel volume and approximate tonnes from area, layer depth, bulk density and delivery allowance.
Sand Calculator
Estimate sand volume and mass for bedding, filling or landscaping from dimensions, depth and bulk density.
Crushed Stone Calculator
Estimate crushed stone volume and tonnes for a compacted base using area, layer depth, density and allowance.
Topsoil Calculator
Calculate topsoil volume and approximate weight for lawns, beds and grading from area, depth and density.
Mulch Calculator
Calculate mulch volume and approximate bulk weight from bed dimensions, spreading depth and waste allowance.
Paver Calculator
Calculate paved area, cutting allowance and whole pavers from project dimensions and individual paver size.
Paver Base Calculator
Calculate compacted base aggregate and bedding sand volumes for a paved patio, drive or path.
Excavation Calculator
Calculate in-place excavation volume and loose haul volume from dimensions and a selectable swell allowance.
French Drain Calculator
Estimate drainage gravel, perforated pipe length and filter fabric for a rectangular French drain trench.
Drain Pipe Slope Calculator
Calculate total pipe fall and ending invert level from run length, starting level and selected slope percentage.
Fence Material Calculator
Calculate fence sections, posts and horizontal rails from total length, post spacing and rails per section.
Fence Post Concrete Calculator
Estimate concrete volume and whole bags for round fence post holes after allowing for the post itself.
Decking Calculator
Calculate deck area, total board length and whole boards from deck size, board width, gap and stock length.
Ramp Length Calculator
Calculate required horizontal ramp length and slope percentage from vertical rise and a selected slope ratio.
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From measurements to a shopping list
Open a tool, enter your measured dimensions, then save an estimate. Keep another version if you want to compare products or allowances.
Planning estimate. Check product specifications and local requirements before purchasing.