Lawn Size & Turf Quantity Calculator Australia

Working out how much turf to buy is where a lot of lawn projects go wrong. Order too little and you’re back at the supplier mid-job; order too much and you’ve paid for rolls you can’t use. This free calculator helps you measure your lawn area — even odd shapes — and turns it into the number of turf rolls or square metres to order, with a sensible waste allowance built in. It works for both natural turf and artificial grass. Enter your measurements below, then read the guidance underneath to order with confidence.

Accurate turf ordering starts with an accurate area. For a simple rectangular lawn, multiply length by width in metres. Most real lawns aren’t neat rectangles, so break the space into shapes you can measure — rectangles, triangles, circles — work out each one, then add them together. The calculator above handles these shapes for you. Measure to the actual turf edge, not the fence line, and note any garden beds, paths or trees to subtract. If you’re laying over a prepared base, our soil & underlay volume calculator helps you work out the material underneath.

Once you have your area, add a waste allowance. For natural turf sold by the roll or square metre, ordering about 5–10% extra covers cuts, curved edges and offcuts that can’t be reused. Rectangular lawns sit at the lower end; lawns with lots of curves and garden beds need more. It’s better to have a little spare than to run short and risk a colour or batch mismatch on a second delivery. Round up to whole rolls where your supplier sells them that way.

The area is the same, but the ordering isn’t. Artificial grass is usually sold in fixed roll widths (commonly around 2 m or 4 m), so your measured area alone won’t always equal what you order — the roll width has to fit your space, and the leftover strip may be unusable. Pile direction and joins also matter: for a natural look, all pieces should run with the pile facing the same way, and joins should be planned to fall in less visible spots, which can increase the total you need. Natural turf is more forgiving here — pieces knit together and the direction is less critical. If you’re weighing up the two, our real vs artificial grass cost calculator compares the long-term costs.

• Lawn shape — curves, corners and garden beds create more offcuts than straight edges.
• Turf format — roll width and length vary by supplier and product, especially for artificial grass.
• Slope and access — awkward or sloping sites can mean more trimming and waste.
• Joins and pile direction — mainly for artificial grass, as above.
• Delivery batches — ordering enough in one go avoids colour differences between deliveries of natural turf.

This calculator gives a practical estimate to help you plan and order, not an exact cutting list. Roll sizes, product widths and site conditions vary, so treat the result as a starting point and confirm quantities with your turf supplier before ordering — most will happily check your measurements. For other jobs around the lawn and garden, see all our garden and landscaping calculators.