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Laying turf doesn’t have to be hard – you just have to get the preparation right and your lawn will be looking amazing in no time.

How to calculate how much turf you need

  • Get a piece of paper and sketch out the areas to be turfed.
  • Break up the areas into basic shapes such as squares, rectangles and circles. See our full list below.
  • Measure each area and write down your measurements.
  • Calculate how many square metres are in each area using the easy formula below.
  • Add the totals together.
  • Order extra! For simple areas like a rectangle, order 5% extra. For more complex irregular areas, order 10% extra. This will allow for any slight miscalculations and wastage from cutting in. It’s better to have some turf left over than run out.
  • Calculate the volume of turf underlay that you need.

Calculating the area of different shaped areas

Calculating the volume of turf underlay

Materials such as soil and sand are measured and ordered in cubic metres and tonnes. To calculate the volume of material required, first work out the area in square metres, and then multiply by the depth to get the cubic metres. Typically you might need 100mm or 150mm of turf underlay (0.1 or 0.15 metres).

Example – You have a rectangle measuring 10m x 6m and need to add 100mm of turf underlay soil. 10m x 6m x 0.1m = 6m3

Example – You have a circular area with a diameter of 14 metres and a radius of 7 metres, needing 150mm of soil. The area is 7m x 7m x 3.14 = 153.86m2. The volume is 153.86m2 x 0.15m = 23.079m3, rounded down to 23m3

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