How Do I Calculate How Many Pavers I Need for My Driveway?

Calculating how many pavers you need for your driveway is straightforward once you know your area and your chosen paver size. The basic formula is: total area ÷ paver coverage area = number of pavers needed — then add at least 10% extra for cuts and waste. Getting this right before you order saves you costly return trips to the supplier or being left short mid-job.

Step 1 — Measure Your Driveway Area

Start by measuring the length and width of your driveway in metres. For a simple rectangular driveway, multiply these two figures together to get your area in square metres (m²).

Example:

• Length: 10 m × Width: 3 m = 30 m²

For driveways with irregular shapes, curves, or turning bays, break the area into smaller rectangles or triangles, calculate each section separately, and add them together. A sketch on paper helps enormously here.

Dealing with Curves and Odd Shapes

For curved edges, measure to the widest point and treat it as a rectangle — this builds in a little extra, which is fine because you'll be cutting pavers to fit curves anyway. Alternatively, use a long tape measure to follow the curve and note the swept length.

Step 2 — Know Your Paver Size

Pavers come in many sizes. Common driveway paver dimensions available in NZ include:

Always check the exact dimensions of the specific paver you're buying, as sizes vary between manufacturers and suppliers. Your local Bunnings or Mitre 10 store will have product sheets, or ask at a specialist paving supplier.

Step 3 — Calculate the Number of Pavers

Once you have your area and the coverage per paver, the calculation is simple:

Number of pavers = Total area (m²) ÷ Coverage per paver (m²)

Or equivalently:

Number of pavers = Total area (m²) × Pavers per m²

Example using 200 × 100 mm pavers on a 30 m² driveway:

• 30 m² × 50 pavers per m² = 1,500 pavers

Step 4 — Add a Waste Allowance

Always order more pavers than your base calculation suggests. Cuts, breakages, and pattern offcuts all eat into your supply. As a general guide:

• Straight/grid pattern: add 10%
• Diagonal or herringbone pattern: add 15%
• Complex shapes or lots of curves: add 15–20%

Continuing the example:

• 1,500 pavers + 10% = 1,650 pavers to order

It's also worth keeping a small number of spare pavers after the job is done — store them somewhere dry in case you need to replace a damaged paver years later. Colours and textures can be discontinued, making matching difficult.

Step 5 — Account for Jointing and Bedding

Pavers aren't laid edge-to-edge — there's typically a 3–5 mm joint between them filled with sand or a jointing compound. This slightly reduces the number of pavers needed per m², but the difference is small enough that your waste allowance covers it. What matters more is calculating the bedding sand or compacted AP20 base you'll need — but that's a separate calculation.

For guidance on correct driveway construction layers and drainage requirements, BRANZ publishes useful technical information for NZ conditions.

Laying Patterns and Their Impact

The pattern you choose affects both the number of cuts and the visual result:

• Stretcher bond (running bond): Simple, minimal cuts, suits rectangular pavers
• Herringbone (45° or 90°): Very stable under vehicle loads, recommended for driveways, but generates more offcuts
• Basketweave: Decorative, moderate cuts
• Random/ashlar: Requires careful planning and more cuts

For driveways that will carry vehicle loads, a herringbone pattern is widely considered the most structurally stable option by paving professionals.

NZ Building Code and Consent Considerations

Most residential driveway paving work falls under Schedule 1 exemptions and does not require a building consent — however, this depends on factors like proximity to boundaries, stormwater drainage, and whether you're altering a vehicle crossing onto a public road. Always check with your local council before starting, as requirements vary by region.

Stormwater runoff from driveways is also a consideration under the NZ Building Code (in particular Clause E1 — Surface Water). Permeable pavers or appropriate drainage channels may be required. MBIE Building Performance has further information on consent requirements.

When to Call a Professional

While calculating paver quantities is a DIY-friendly task, the actual installation of a driveway involves significant groundwork — excavation, compacted base layers, correct falls for drainage, and proper edging restraints. Errors here can lead to sinking, cracking, or pooling water.

If your driveway:

• Is on a slope or has drainage challenges
• Requires a new vehicle crossing from the road (which may need council approval and specific construction standards)
• Involves retaining walls or significant earthworks
• Is large or complex in shape

…it's well worth engaging a qualified driveway layer or landscaper. You can find experienced local paving professionals on tradedirectory.co.nz who can also help you finalise your quantities and material choices.

Sources & Further Reading

• BRANZ — Building Research Association of NZ
• MBIE Building Performance — Building Consent Information
• Bunnings NZ — Paving & Driveway Products
• Mitre 10 NZ — Paving Products
• PlaceMakers NZ — Landscaping Supplies
• WorkSafe NZ — Safe Work Practices