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How to calculate how much decking you need

Creating an inviting outdoor space with floor decking that clicks together is easy when you’ve worked out how much flooring to buy. Check out our simple guide below to find out how much flooring you need.

An outdoor space where RUNNEN floor decking in artificial grass and wood form different zones for eating and relaxing.
An outdoor space where RUNNEN floor decking in artificial grass and wood form different zones for eating and relaxing.

1. Find the surface area

Start by measuring the length and width of your outdoor space. To find the total area, multiply the length by the width. If needed,  you can then calculate any areas to be subtracted from the total, such as pillars or corners, using the same method.

Wooden flooring that fits the outdoor space perfectly, with a potted plant in a metal plant pot and a white wall behind.

2. Calculate how many packages you need

Look for the total area included in each pack of floor decking, then divide that number by your surface area. For example, square tiles come in packs that cover 0.81 square metres, so you need to divide the surface area you found by 0.81. Don’t forget to round up the number so you have enough tiles.

Hands installing a section of floor decking in artificial grass next to dark grey decking.

Quick calculator for RUNNEN flooring

Lots of maths right? If you're interested in our RUNNEN flooring, use our quick calculator to find out your total area and how many packages you'll need. We've also put some of our most common surface areas with our flooring series below. 

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Get going with ready-made calculations for MÄLLSTEN, RUNNEN and ALTAPPEN decking

Want to buy MÄLLSTEN, RUNNEN or ALTAPPEN decking but still not sure how much you’ll need? We’ve listed some of the most common surface areas with the number of packages you’ll need below.*

  • 2 m2 needs 3 packages
  • 5 m2 needs 7 packages
  • 7 m2 needs 9 packages
  • 10 m2 needs 13 packages
  • 12 m2 needs 15 packages
  • 18 m2 needs 23 packages
  • 20 m2 needs 25 packages
  • 25 m2 needs 31 packages
  • 30 m2 needs 37 packages

*The exact number of packages you need may differ depending on the shape of your area, some areas may need an extra pack or two.

A balcony with patterned MÄLLSTEN decking, a lemon tree in a pot and a white plastic chair.
A spacious outdoor terrace with grey decking and a hammock hanging in one corner with striped cushions on top.

Get going with ready-made calculations for UTLÄNGAN decking

Want to buy UTLÄNGAN decking but confused by all this maths? To help you out we’ve listed some of the most common surface areas with the number of packages you’ll need below.*

  • 2 m2 needs 3 packages
  • 5 m2 needs 6 packages
  • 7 m2 needs 8 packages
  • 10 m2 needs 12 packages
  • 12 m2 needs 14 packages
  • 18 m2 needs 20 packages
  • 20 m2 needs 23 packages
  • 25 m2 needs 28 packages
  • 30 m2 needs 34 packages

*The exact number of packages you need may differ depending on the shape of your area, some areas may need an extra pack or two.