Common Tasks
Lay a Patio or Walkway
All Landscaping & Site Work Calculators
Gravel Calculator
gravel
Calculate gravel volume in cubic meters and weight in tonnes for driveways, paths, and drainage, with density values by material type.
Gravel Weight Calculator
gravel
Calculate gravel weight from volume using material-specific bulk density. Select aggregate type to convert m³ to kg or lbs instantly.
Gravel Cost Calculator
gravel
Estimate total gravel cost from volume with waste factor. Price by cubic meter or tonne with an itemized cost breakdown table.
Gravel Truckloads Calculator
gravel
Calculate how many dump truck trips you need to deliver gravel. Select truck payload size — trip count rounds up to whole trips.
Driveway Gravel Calculator
gravel
Calculate gravel quantity for driveways, paths, patio bases, and drainage layers. Depth auto-fills from application type selection.
Crushed Stone Calculator
gravel
Calculate crushed stone volume and weight for base layers, driveways, drainage, and landscaping. Choose limestone, granite, or recycled concrete (RCA) for accurate density calculations.
Pea Gravel Calculator
gravel
Calculate how many bags of pea gravel you need for paths, garden beds, and decorative areas. Choose 25kg or 50kg bags — bag count rounds up to the nearest whole bag.
Paver Base Calculator
gravel
Calculate two-layer paver sub-base: drainage rock (1.45 t/m³) and compacted road base (2.0 t/m³, 1.15× compaction factor). Layer-by-layer breakdown plus combined totals.
French Drain Calculator
gravel
Calculate drainage gravel for French drain trenches. Accounts for pipe displacement using π × (OD/2)² × length formula. Select 100mm, 150mm, or 200mm pipe.
Road Base Calculator
gravel
Calculate road base (DGB/crusher run) order quantity from compacted depth. Compaction factor 1.30–1.35× works out loose volume needed. Density 2.0 t/m³.
Topsoil & Mulch Calculator
landscaping
Estimate topsoil, mulch, or bark quantities by area and desired depth for garden beds, lawn prep, and landscaping projects.
Paver Calculator
landscaping
Estimate paver quantities for patios, driveways, and walkways, including waste allowance for cutting patterns and edge trimming.
In-Depth Guide
Learn the concepts behind these calculators with worked examples and reference tables.
Landscaping & Site Work Guide →