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Lawns come in various shapes and sizes and sometimes it is not always easy to know how many rolls of turf you are going to need if you wish to lay (or re-lay) your garden grass.

You also might not need to cover your entire garden, you might only need it for certain sections of it.

Let’s take a look at how you can calculate how many rolls of turf you need for varying shapes and sizes of gardens.

The size of each roll of our garden turf is 1 square metre.

Now that you know the size, you can start to work out how many rolls of turf you will need to cover your lawn.

The next step is acquiring the measurements of your lawn.

In an ideal world, for the most simple of calculations, your garden will be a square or rectangular shape and you will want to apply rolls of turf to the entirety of the space.

To calculate how many rolls in this instance, you will need to measure the length and width of your lawn in metres.

Let’s start with a reasonably sized garden that is 9 metres wide and 13 metres long.

9 metres x 13 metres = 117 square metres.

With every roll being 1 square metre, it’s nice and easy to see that you will need 117 rolls of turf to cover this space.

Obviously if you don’t want to cover the whole garden, you just need to measure the space that you wish to turf.

This calculation works for both square and rectangular gardens.

Most lawns will not give you a perfect round number to work with, it is very likely that your lawn could be something like 9.4 metres by 7.3 metres.

9.4 metres x 7.3 metres = 68.62 metres.

If you wish to fully cover the whole space, you’d need 69 rolls.

When you lay your turf, it’s unlikely that each roll will perfectly fit end-to-end without any need for cutting. This means that when you’re laying the grass, you’ll need to cut and shape a few rolls in order to fit them inside your garden borders.

Make sure there aren’t any gaps or pieces of turf overlapping each other which can make your lawn look unappealing.

A lot of people will have gardens that only require turf on certain sections. Some people might have gravel, a patio or a concrete driveway which are obviously not areas you will be looking to lay grass on.

You will need to measure all the sections by length and width that you wish to apply the rolls of lawn turf to.

You will follow the same formula for each section and then you will add them all up to get the total number of rolls of turf that your lawn will need.

For example, you have 3 measurements or sections that you have gone out and measured. Let’s say the first one is 3.2 by 4.5, second one is 3.3 by 5.2 and the third is 2.7 by 3.5.

3.3 x 4.5 = 14.85

3.3 x 5.2 =17.16

2.7 x 3.5 = 9.45

Now we must add all these numbers together:

14.4 + 17.16 + 9.45 = 41.46

If this was someone’s lawn, they would need to buy 42 rolls of lawn turf in order to cover the whole space.

However, it’s often preferred and recommended to make sure you have enough rolls for each section. In this case, you’d need 15 rolls for the first section, 18 for the second and 10 for the third, so 43 in total.

For the small difference in price of one extra roll, it can make your life a lot easier and less stressful.

These lawns are two different shapes and will require a different mathematical equation and process to figure out.

Please be aware that whilst this may seem complex on the surface, it’s actually really simple.

Let’s start with a circle:

With a circular shaped lawn you will need to calculate the radius of the space. To work out the radius, simply measure the full width of the circle and then divide it by 2.

You will now multiply the radius by itself.

Therefore, if the circle was going to be 10 metres wide, the radius would be 5 metres and you would then multiply that by itself. 5 x 5 = 25 metres.

Finally, you will multiply this number by pi, which is 3.14.

5 metres x 5 = 25 metres. 25 metres x 3.14 = 78.5.

You would need to purchase 79 rolls of turf to fully cover this circle shaped lawn.

An oval shaped lawn will require a different formula.

You will need to measure the length and width similar to when you were measuring your square or rectangular shaped lawn.

You will then multiply the length of the lawn by 0.8 and then multiply that number by the width.

For example, if the lawn measures 10 metres in length and 5 metres in width…

10 metres x 0.80 = 8 metres. 8 metres x 5 metres = 40 metres.

You will need to purchase 40 rolls of turf to fully cover this oval shaped lawn.

If you need to know how much turf for a triangular shaped lawn, you will need to measure the height of the triangle and the width of the base.

You will multiply the measurement of the base by 0.5 and then you will multiply that number by the height.

For example, if the measurement of the base is 7 metres and the height is 5 metres:

7 metres x 0.5 = 3.5 metres. 3.5 metres x 5 metres = 17.5 metres.

You will need to purchase 18 rolls of lawn turf to fully cover this triangular shaped lawn.

Lawns can come in many shapes and sizes with various different obstacles getting in the way.

These methods and formulas above should help make the process of buying rolls of turf easier to do, now that you have the knowledge to know exactly how many rolls of turf you will need.