How Much Artificial Grass Do I Need? A Guide to Roll Widths and Waste

To calculate how much artificial grass you need, measure the maximum length and width, work out the square metre area, then plan how the garden fits within the selected product’s roll width. 

The final order may be larger than the lawn area because of pile direction, joins, trimming and unusable offcuts. Choosing the product first helps you plan the correct roll layout and avoid relying on area alone when deciding how much artificial grass to order.

How Is Artificial Grass Measured and Sold?

Artificial grass is measured in square metres but supplied from rolls with fixed widths and cut lengths. This means the rectangular section cut from the roll can be larger than the exact shape of your garden.

Start by calculating the area using:

Length × width = area in square metres

For example, a garden measuring 4.2 m × 5 m has an area of 21 m². This tells you the size of the lawn, not necessarily the amount of grass you need to order.

Artificial grass is supplied in fixed roll widths, which vary between products. Curves, corners and irregular shapes can also create offcuts that cannot always be reused. For this reason, measuring the garden is only the first stage. You also need to plan how the chosen product fits the space while keeping the pile direction consistent and minimising unnecessary joins.

Choose your product before completing the layout, as available roll widths may differ between ranges. You can browse and compare artificial grass products to confirm the available options before calculating your final order.

What Is a Linear Metre of Artificial Grass?

A linear metre is one metre of length taken from a roll at its fixed width. The total area covered depends on the width of that roll. As ordering methods can vary between products, always follow the dimensions shown on the selected product page rather than assuming every range is supplied in the same format.

Why Can the Order Be Larger Than the Lawn Area?

The final order can exceed the garden's measured area because artificial grass is supplied in fixed roll widths. Curved edges, trimming, joins, pile direction and unusable offcuts can all increase the roll footprint. This is a normal part of planning an installation and helps ensure the grass fits correctly once trimmed on site.

What Should You Measure Before Ordering?

Measure the maximum length and width of the area, record the full shape and mark any permanent features before planning the roll layout. Measuring only the existing lawn can be misleading if the edges are uneven or overgrown.

Create a labelled sketch showing flower beds, patios, paths, sheds, trees, drains, steps and any separate lawn areas. Also mark the main viewing position, as this helps determine the pile direction before planning joins.

If access is restricted by narrow gates, passageways or steps, note this before ordering larger roll widths.

Which Units Should You Use?

Use metres throughout your measurements and convert any centimetres before calculating the area. Keep the exact figures you recorded on site and avoid rounding down, as small differences can affect the final roll layout and trimming allowance.

Should You Measure More Than Once?

Yes. Recheck the longest and widest points before ordering, particularly if the garden has irregular boundaries. Compare every measurement against your sketch and ask someone to confirm larger dimensions where possible. Taking a few extra minutes to verify your measurements can help prevent ordering the wrong quantity of artificial grass.

How Do You Measure a Square or Rectangular Garden?

Measure the maximum length and maximum width in metres, then multiply them to find the basic garden area. Treat this number as the first calculation rather than your final order quantity.

Consider a garden measuring:

Length: 6 m
Width: 4 m

The basic area is:

6 × 4 = 24 m²

You now know the garden contains 24 m² of surface area.

Next, check the available width for your chosen artificial grass. Decide which direction the pile will face, then work out how the roll can cover the 6 m × 4 m rectangle.

Even a rectangular garden can require a different quantity from its mathematical area if its dimensions do not align efficiently with the available roll.

Should You Round Measurements Up?

Do not round measurements down.

Keep the figures you recorded on site and use them when planning the roll. Any additional amount for positioning or trimming should be considered at the ordering stage rather than added through arbitrary rounding.

This approach gives you a clearer distinction between measured area, roll footprint and installation allowance.

How Do You Measure an L-Shaped Garden?

Divide an L-shaped garden into two rectangles, calculate the area of each section separately, then add the totals together. Once you know the combined area, recreate the full shape as a roll layout to check joins, pile direction and any usable offcuts.

For example:

• Rectangle A: 5 m × 3 m = 15 m²

• Rectangle B: 2 m × 2 m = 4 m²

Total garden area: 19 m²

This calculation gives you the lawn area, not the final order quantity. You still need to check how the chosen product's roll width fits the layout.

If an offcut appears suitable for the second section, make sure it also has the correct pile direction before including it in your plan. Rotating a piece to make it fit can create a visible colour difference.

For more complex layouts, it's worth asking Tuda Grass to check your measurements before the grass is cut.

How Do You Measure Curved and Irregular Gardens?

Measure the maximum length and width first, then divide the garden into simple rectangles or use a labelled sketch to map curves and narrow sections. This gives you a practical guide for planning the roll layout, even if the finished lawn has irregular edges.

Use a straight boundary as a reference and measure to the curved edge at several points. Record these on your sketch, including any corners or narrow extensions. The roll will still be cut as a rectangle before being trimmed to shape, making the roll footprint just as important as the garden area.

If your garden has several curves or unusual features, sending a labelled sketch and photographs to Tuda Grass can help confirm the most efficient layout before ordering.

Should You Deduct Flower Beds, Trees or Patios?

Large permanent features may reduce the grass-covered area, although smaller internal obstacles do not always reduce the roll required. Plan the full layout before deducting any exclusions.

How Do You Measure Around a Tree?

Measure the surrounding area and mark the trunk clearly on your sketch, including any border you plan to leave. The cut-out may not be reusable elsewhere, so include it when planning the overall roll layout.

What Artificial Grass Roll Widths Are Available?

Artificial grass is supplied in fixed roll widths, and the available options can vary between products. Always check the dimensions of your chosen grass before finalising the layout, as roll width affects joins, waste and the overall quantity required.

Tuda Grass offers artificial grass in a range of widths, although not every product is available in every size. Choosing the product first allows you to plan the most efficient roll layout and reduce unnecessary waste.

Before ordering, compare the available widths for your selected product rather than assuming all ranges are supplied the same way. This is especially important for larger or irregular gardens where different roll options can significantly affect the number of joins.

Does Every Artificial Grass Product Come in the Same Width?

No. Roll widths vary between products, so always check the current product page before planning your layout. Changing to a different grass may also change the most efficient roll width for your project.

How Does Roll Width Affect the Amount You Need?

Roll width influences how much artificial grass you need by affecting the number of joins, the amount of waste and the overall roll layout. The most efficient option balances material use with a neat finish while keeping the pile direction consistent.

A wider roll may reduce joins but leave more unused material. A narrower roll could create less waste while requiring additional joins. The best choice depends on your garden's dimensions and the available widths for your chosen product.

Avoid changing the pile direction or using narrow strips simply to reduce waste. Instead, plan the layout first, then calculate the quantity.

If more than one layout looks suitable, ask Tuda Grass to review your measurements before placing a cut order. A well-planned join can be a better solution than ordering significantly more grass than your project requires.

Which Way Should the Artificial Grass Pile Run?

The pile should normally face the main viewing area, and every piece should run in the same direction. Plan the pile before deciding on the roll layout, as changing its direction can create visible colour differences between sections.

The main viewing point is usually the house, patio or seating area. Mark pile arrows on your sketch and keep them consistent across the installation. Even if an offcut fits another section, avoid rotating it to reduce waste.

Before ordering, check the pile direction alongside your chosen roll layout. For more installation advice, read the Tuda Grass guide on how to install artificial grass.

How Much Extra Artificial Grass Should You Order?

Allow enough material for accurate positioning and trimming, while basing the allowance on your garden and chosen layout rather than applying a universal percentage. There is no responsible reason to assume every project needs the same waste allowance.

A regular garden with straight, accurately measured boundaries presents different cutting demands from a curved lawn with several obstacles.

Consider:

• how square the boundaries are

• the number of curved edges

• obstacles and cut-outs

• your confidence in the measurements

• the number and position of joins

• the available roll width

• the installation method

Keep trimming allowance separate from shape waste. One gives you working material around the installation boundary. The other results from parts of the rectangular roll which cannot serve the finished layout.

If the margin is unclear, confirm your artificial grass quantity with Tuda Grass before placing a cut order.

How Do You Allow for Cuts, Joins and Waste?

Waste is created by fixed roll widths, trimming, irregular edges and offcuts that cannot be reused. While careful planning can reduce unnecessary waste, some material is unavoidable.

Before reusing an offcut, check that it is large enough, matches the selected product and can be installed with the pile facing the correct direction. Avoid adding unnecessary joins simply to use every leftover piece.

Keep any sizable offcuts until the installation is complete, as they may be useful for smaller sections or future repairs.

Remember that trimming allowance and waste are different. Trimming allowance provides enough material to position and cut the grass accurately, while waste is material that cannot be used because of the garden shape or roll layout.

The aim is not to eliminate every offcut, but to achieve a practical layout with the right balance between material use, appearance and the number of joins.

How Can You Reduce the Number of Joins?

Reduce joins by choosing the most suitable roll width and planning the layout before ordering. Fewer joins can improve the finished appearance, although eliminating every seam may increase waste.

Keep the pile direction consistent, avoid narrow strips where possible and position joins carefully within the layout. If two options seem equally practical, compare the extra material against the additional installation work.

A well-planned join is usually a better choice than ordering significantly more grass.

How Do You Calculate Artificial Grass for Multiple Areas?

Measure each area separately, then check whether they can share one roll layout while keeping the same pile direction. Label each section and record its dimensions before comparing how the pieces fit together.

Where colour consistency is important, order all areas together, as separate orders may come from different production batches. If your project includes several connected spaces or more than one possible layout, send a labelled sketch and measurements to Tuda Grass before ordering. This can help confirm the most efficient roll layout while reducing unnecessary joins and waste.

Common Artificial Grass Measuring Mistakes to Avoid

Many ordering problems start with inaccurate measurements or planning the area without considering roll width and pile direction. Avoiding a few common mistakes can help reduce waste and unnecessary joins.

Taking time to plan the roll layout before ordering can help you avoid unnecessary waste and achieve a cleaner finished installation.

What Else Do You Need for the Installation?

Artificial grass is only one part of the installation. Depending on your project, you may also need weed membrane, sub-base materials, edging, joining tape, adhesive, fixings, infill or a shockpad.

Not every installation requires every item. Soil and hard-surface installations have different requirements, while pet or play areas may need additional products.

Calculate these materials separately from your artificial grass order. The amount of grass you need does not determine the quantity of base materials or accessories required.

When Should You Ask for Help Measuring?

Ask for advice when the garden has an irregular shape, several possible joins, multiple areas or a product width which does not fit the space efficiently. Resolving the layout before cutting is safer than trying to redesign it after delivery.

Prepare the following information before you contact Tuda Grass.

• selected product or shortlist

• labelled sketch

• maximum length and width

• dimensions for every change in shape

• photographs of the area

• main viewing position

• proposed pile direction

• doors, drains, trees and other obstacles

• measurements for separate sections

• narrow or restricted access points

The current Tuda Grass contact page provides direct phone, email and enquiry-form options for discussing a project.

For an L-shaped, curved or multi-area garden, provide the whole drawing rather than a square metre total alone.

Frequently Asked Questions About Measuring Artificial Grass

Is Garden Area the Same as the Amount I Need to Order?

No. Roll width, pile direction, joins and trimming can all affect the final quantity.

Should I Add 10% Waste?

Avoid using a fixed percentage. Plan the roll layout first, then allow for trimming and unavoidable offcuts.

Can I Use Offcuts in Another Part of the Garden?

Yes, provided they're large enough and the pile direction matches. Rotating pieces can create visible colour differences.

How Do I Measure a Garden With Curved Borders?

Measure the maximum dimensions and sketch the curves. The roll layout is usually more important than the exact curved area.

Do I Deduct a Shed or Patio From the Measurement?

Large permanent features may reduce the grass area, although smaller obstacles don't always reduce the roll required.

How Can I Keep Joins to a Minimum?

Choose the most suitable roll width before ordering. Read our guide on how to join artificial grass correctly for further advice.

Which Way Should the Pile Face?

The pile should normally face the main viewing area. Our guide on how to install artificial grass explains this in more detail.

Should I Order Samples Before Measuring?

It's best to choose your product first. Order artificial grass samples before finalising your roll layout.

When Should I Contact Tuda Grass?

If your garden is irregular, has several separate areas or more than one possible layout, contact Tuda Grass before placing your order.

Calculating the garden area is only the first step. Choose your artificial grass first, confirm the available roll width, then plan the layout with pile direction, joins and trimming in mind. 

Keep accessories separate from your grass calculation and check whether any offcuts can be reused without changing their orientation. For L-shaped, irregular or multi-area gardens, sending a labelled sketch and measurements to Tuda Grass before ordering can help you avoid costly mistakes.