How Many Wall Panels Do I Need? Measure Your Room Right
By Aku Woodpanel premium | Published: 2026-10-16
Category: Buying Guides
Learn how to measure your wall and calculate panel quantity, coverage per box, and waste allowance so you order the right amount the first time.
Quick answer
Measure the total square footage of the wall you plan to cover, then divide by the coverage per box listed on the product page. Add 10% for waste on straight walls and 15% for walls with outlets, corners, or diagonal cuts. Always round up to the next full box.
Measure the wall, not the room
For each wall, multiply the height by the width in feet to get square feet. If you are covering multiple walls, measure each separately and add the totals. Subtract large permanent openings like windows and doors if you will not panel over them, but do not subtract small outlets or switches—those cuts create offcuts that are hard to reuse.
Write down each wall's dimensions and label them (for example, 'north wall' or 'behind sofa') so you can match panels to the space when they arrive.
Find coverage per box on the product page
Panel coverage varies by style and size. For example, the Exterior Wall Panel Birch 94.5" comes with 2 panels per box; you will need the panel dimensions to calculate square footage per box. The Acoustic Slat Wall Panel is sold in boxes that include multiple panels, and the End Piece - Slat Wall Panel includes two panels that are 11.8" wide each, creating a combined width of 23.6". Always check the 'each box includes' line and the panel dimensions before calculating.
If the product page shows only panel dimensions and not total box coverage, multiply the width by the height of one panel, then multiply by the number of panels in the box.
Add a waste allowance
Waste covers cuts, mistakes, and future repairs. A standard 10% allowance works for simple rectangular walls with few obstructions. Increase to 15% if you have many outlets, corners, or plan a diagonal or herringbone pattern. For rooms with complex layouts or multiple walls, 20% is safer.
Keep at least one spare panel or box unopened. It helps with color matching later and saves you from ordering a new batch if a panel gets damaged.
Quick answers to common panel quantity questions
- How do I calculate panels for a wall with a door?
- Measure the full wall area, then subtract the door area (height × width). Add 10% waste for the remaining area. If the door is in a corner and you plan to panel around it, you may need extra for narrow strips. Round up to the nearest box after subtracting.
- What if my wall is not a simple rectangle?
- Break the wall into smaller rectangles and triangles. Calculate each area separately, then add them together. For triangles, multiply base × height and divide by 2. Add 15% waste for angled cuts. Sketch the wall and label each shape to avoid missing sections.
- How many hexagon panels do I need?
- Hexagon panels are sold in boxes with a stated coverage area. Divide your wall square footage by the coverage per box, then add 10–15% waste. Because hexagons interlock, partial pieces at edges may be less useful, so order an extra box if you are close to the next full box. Check the product page for the exact number of hexagons per box and their coverage.
- Can I return extra panels?
- Return policies vary. Check the store's return window and condition requirements before ordering. Keeping one spare box is often more practical than returning a single panel, especially for future repairs. Confirm the return policy before you buy.
Product details that affect your order
- Exterior Wall Panel Birch 94.5" | Garden | 3D Wood Grain (2 Panels per Box): Exterior Wall Panel Birch 94.5" comes with 2 panels per box. You must know the panel dimensions to calculate square footage per box; order in whole boxes.
- Acoustic Slat Wall Panel | Smoked Oak with Gray Felt | Premium 3-sided Wood Veneer: Acoustic Slat Wall Panel is available in multiple sizes, and free shipping applies for 5 or more 94.5" panels or 11 or more 118.1" panels. If your calculated quantity meets the free-shipping threshold, you may save on delivery.
- End Piece - Slat Wall Panel | Rustic Oak: End Piece - Slat Wall Panel includes two panels that are 11.8" wide each, creating a combined width of 23.6". Use end pieces to finish edges neatly; factor their width into your total coverage if they replace full panels at the ends.
