Total Concrete Required
0.00 m³
Including wastage for standard path & patio project
Professional-grade concrete estimates for garden paths, patios, and outdoor entertaining areas
Instant concrete volume, thickness, and cost estimates for small residential paths and patio slabs. Ideal for DIY homeowners, landscapers, and builders planning 2026 outdoor projects in Australia.
Quickly size concrete for paths, patios, and outdoor slabs using simple dimensions
Enter length, width, and slab thickness to calculate exact concrete volume in cubic metres for your path or patio slab. The calculator supports standard 75mm, 100mm, and 125mm thicknesses commonly used in Australian residential projects.
Get instant cost estimates based on typical 2026 ready-mix concrete prices per m³, plus estimated reinforcement mesh and wheelbarrow loads. Use this to compare DIY mixing versus delivered concrete for your outdoor area.
Built for garden paths, patios, alfresco areas, and small slabs around the home. Combine this path & patio concrete calculator with our alfresco slab calculator when planning larger entertaining spaces.
Enter your path or patio dimensions below to work out concrete volume and cost
Most Australian garden paths and patios use 75–100mm thick concrete with light reinforcement and good subgrade preparation.
This path & patio concrete calculator multiplies length, width, and thickness to determine slab volume in cubic metres, then adds your selected wastage allowance to give an order quantity suitable for 2026 residential projects.
For simple rectangular paths and patios, this direct volume method is the quickest way to size ready-mix orders and avoid short deliveries or excessive surplus concrete.
Step 1: Convert thickness from millimetres to metres (for example, 100mm ÷ 1000 = 0.10m).
Step 2: Slab Volume (m³) = Length (m) × Width (m) × Thickness (m).
Step 3: Order Volume = Slab Volume × (1 + Wastage%).
Australian garden paths and outdoor slabs generally follow these common thickness guidelines for plain concrete on a compacted subgrade. Always confirm requirements with your engineer or council before ordering concrete.
| Application | Typical Thickness | Suggested Strength | Notes |
|---|---|---|---|
| Garden path (pedestrian only) | 75mm | 20 MPa | Light-duty use with well-compacted base. |
| Patio / outdoor entertaining area | 100mm | 25 MPa | Standard slab for chairs, tables, and BBQs. |
| Alfresco / outdoor living off house | 100–125mm | 25–32 MPa | Often tied into house footings; check engineering. |
| Occasional light vehicle crossover | 125mm | 32 MPa | Use an access road concrete calculator for full design. |
When planning a path or patio, account for excavation depth, base material thickness, and final finished height relative to door thresholds and surrounding landscaping. Small changes in thickness significantly affect total concrete volume and cost.
Use this path & patio concrete calculator alongside your supplier’s recommendations and local council guidelines to ensure compliant and durable outdoor slabs.
Before Pouring Path & Patio Concrete:
Weather & Curing Considerations:
Use these resources alongside this path & patio concrete calculator when designing your outdoor slab.
Check National Construction Code (NCC) requirements for concrete slabs, drainage, and outdoor structures.
Visit ABCBTechnical guidance on concrete mixes, curing, and slab design for paths and patios.
Visit Concrete GuidesMany councils publish standards for paths, crossovers, and outdoor slabs adjoining public land.
Find Local Council