How Many Acoustic Wall Panels Do I Need? A Simple Measuring Guide

Calculating the correct number of acoustic wall panels is one of the most important steps before ordering.

Too few panels may delay the project and require a second order. Ordering significantly more than necessary increases the project cost and leaves unused material.

A reliable calculation should consider more than the total wall area. Panel width, wall height, box quantity, openings, cuts, installation direction, and the final layout all affect the number of panels required.

This guide explains how to measure your wall and estimate the number of NORDAN acoustic slat wood panels needed for your project.

Start by Deciding What Area You Want to Cover

Before measuring, decide whether the project will cover:

• One complete wall
• A section of a wall
• The area behind a television
• The area behind a bed
• A desk or office background
• Several connected wall sections
• A corner or architectural feature

A full-wall installation requires measurements from one finished edge to the other.

A partial installation requires a clearly planned starting and ending point. Marking the intended area with painter’s tape can help you understand the final proportions before ordering.

Do not calculate the quantity until the installation area has been defined.

Measure the Wall Width

Measure the wall horizontally from the intended starting point to the intended ending point.

Take the measurement at several heights:

• Near the floor
• Around the center of the wall
• Near the ceiling

Walls and corners are not always perfectly straight. If the measurements are slightly different, use the largest width when calculating the panel quantity.

Record the measurement in either inches or millimeters, but use the same unit throughout the calculation.

For the most accurate result, millimeters are usually easier when working with panel dimensions.

Measure the Wall Height

Measure the height at several points across the wall.

Check:

• The left side
• The center
• The right side

Floors and ceilings may not be perfectly level, especially in older buildings.

NORDAN Full Wall panels measure approximately:

2350 × 280 mm
92.52 × 11.02 in

The 2350 mm dimension is the panel length, and the 280 mm dimension is the panel width.

Before ordering, compare the panel length with the actual installation height.

If the wall is shorter than the panel, the panel can normally be cut to the required length.

If the wall is taller than the panel, the layout may need to include:

• A baseboard
• A planned upper or lower gap
• A horizontal trim detail
• A different panel format
• A revised installation design

Do not assume that one panel will cover the complete wall height without checking the actual measurements.

IMAGE 1 — Cover Image

Placement: Article cover and below the introduction.

Image content:

A realistic modern interior renovation scene showing one person measuring the width of a clean wall with a tape measure before installing acoustic slat wood wall panels.

A small section of walnut acoustic slat panels may be visible at one edge of the wall as a product reference. The room should be minimal, bright, premium, and realistic.

No text, logo, or watermark.

Calculate the Number of Full Wall Panels

For a standard vertical installation, the main calculation is based on the wall width.

Use this formula:：Wall width ÷ Panel width = Number of panels

For NORDAN Full Wall panels, each panel is approximately 280 mm wide.

Always round the result up to the next whole panel.

Example

Assume the wall is:

3600 mm wide

The calculation is:

3600 ÷ 280 = 12.86 panels

Because partial panels cannot be ordered individually as full coverage units, round the result up:

13 panels required

If each box contains two Full Wall panels:

13 ÷ 2 = 6.5 boxes

Round up again:

7 boxes required

Seven boxes provide 14 panels, leaving one additional panel for the project.

Why You Must Round Up

A calculation result should never be rounded down.

For example:

10.2 panels

does not mean that 10 panels are sufficient. It means the installation requires 11 panel widths to cover the planned area.

Rounding down may leave part of the wall uncovered.

The same rule applies when converting panels into boxes. If the calculation produces 5.5 boxes, six boxes are required.

Should You Calculate by Area or by Width?

Square-foot or square-meter calculations are useful for an initial estimate, but they may not provide the most accurate order quantity.

Acoustic slat panels are installed as fixed-width vertical units. The number of panel widths across the wall is often more important than the total wall area.

For a complete vertical feature wall, calculate by:

1. Confirming that the panel length is suitable for the wall height.
2. Dividing the wall width by the panel width.
3. Rounding up to a complete panel.
4. Converting the panel quantity into complete boxes.

Area-based calculations can underestimate the quantity when:

• The final panel needs to be cut
• The wall has an irregular shape
• Openings interrupt the layout
• Multiple narrow sections are being covered
• The product is sold only in full boxes

Use the product-page calculator for the final estimate whenever available.

Should Doors and Windows Be Subtracted?

Large openings may reduce the amount of material required, but they should not always be subtracted automatically.

Full-height doors

A full-height door located at the edge of the installation area may reduce the total width that needs to be covered.

In this case, calculate the wall sections on each side separately.

Windows

If panels are installed only below, above, or beside a window, divide the wall into separate rectangular sections and calculate each section individually.

Electrical outlets and switches

Do not subtract small outlets, switches, or cable openings from the panel quantity.

The panel must still cover the surrounding wall, and the opening will be cut from the panel during installation.

Television mounts and wall fixtures

Do not subtract the area behind a television, bracket, shelf, or wall-mounted object unless the panels will not be installed behind that area.

The final decision should follow the planned installation layout, not only the visible wall area.

Divide Irregular Walls into Separate Sections

For walls with corners, doors, windows, sloped ceilings, or recessed areas, divide the project into simpler sections.

For example:

• Section A: Left side of the window
• Section B: Below the window
• Section C: Right side of the window
• Section D: Wall return around the corner

Calculate each section independently, then combine the results.

This is usually more accurate than treating the entire wall as one large rectangle.

Keep in mind that a leftover piece from one section may sometimes be used in another section, but this depends on:

• The required dimensions
• The direction of the slats
• The position of the cut
• The condition of the remaining piece
• The visual layout

Do not assume every offcut can be reused.

IMAGE 2 — Quantity Calculation Diagram

Placement: After the calculation example.

Image content:

A clean technical illustration on a warm white background showing a rectangular wall with measurement arrows.

Include:

• Wall Width
• Wall Height
• Vertical panel divisions
• One panel width marked as 280 mm
• A simple example showing 3600 mm wall width
• 13 panels required
• 7 boxes required
• 2 panels per box

Use thin black lines, subtle warm wood panel textures, and minimal English labels.

No logo or watermark.

Plan the First and Final Panel Widths

The calculation tells you how many panels are required, but the final appearance also depends on how the panels are distributed across the wall.

If the last panel requires a very narrow cut, the result may look unbalanced.

Before installation, calculate the remaining width:

Total panel coverage − Wall width = Remaining material

You may decide to:

• Start with a full panel and cut only the final panel
• Divide the required cut between the first and final panels
• Align the first panel with a corner, door, cabinet, or other architectural feature
• Adjust the layout so that the visible end panels have similar widths

A centered layout can create a more balanced result, but it may require cutting both the first and final panels.

A corner-to-corner layout is usually simpler and may reduce installation time.

Dry-fit the layout before permanently fixing any panel.

Allow for Cutting and Installation Conditions

A small amount of additional material can be useful when the project includes:

• Several corners
• Angled ceilings
• Multiple electrical openings
• Difficult cuts
• Damaged or uneven wall edges
• Complex window or door details
• Limited installation experience

The box quantity may already provide an additional panel because orders must be rounded up to complete boxes.

For example, if 13 panels are required and each box contains two panels, seven boxes provide 14 panels.

That additional panel may be sufficient for a simple installation.

More complex projects may require a separate allowance. Review the layout before deciding whether another box is necessary.

Do Not Mix Product Sizes in One Calculation

If the project uses more than one panel format, calculate each format separately.

For example:

• Calculate the Full Wall panel area independently.
• Calculate a shorter or modular panel area independently.
• Convert each result into the correct box quantity.
• Do not combine the coverage of different formats unless the layout has been fully planned.

Different product formats may have different:

• Panel dimensions
• Box quantities
• Installation patterns
• Coverage areas
• Cutting requirements

Confirm the exact product specification on the selected product page before ordering.

Why Ordering the Full Project Quantity Together Matters

Minor differences may occur between production batches.

These may include small variations in:

• Wood tone
• Grain appearance
• Surface pattern
• Finish depth
• Overall color

Ordering the complete project quantity at the same time helps reduce the possibility of visible batch variation across one wall.

This is particularly important for:

• Large feature walls
• Connected rooms
• Commercial projects
• Walls viewed under strong directional lighting
• Projects using dark or highly visible finishes

If additional panels are ordered later, an exact color match cannot always be assumed.

Check the Boxes Before Installation

When the order arrives, confirm the quantity before starting the installation.

Check:

• The number of boxes
• The panel format
• The selected color
• The panel dimensions
• The condition of the packaging
• The condition of the panels
• Whether all panels appear suitable for the same project

Keep the packaging and shipping labels until the order has been fully checked.

If there is visible damage, a missing item, or an incorrect product, contact NORDAN before cutting, drilling, gluing, modifying, or installing the affected panels.

Common Measuring Mistakes

Measuring only once

Walls may not be perfectly straight. Measure at several points.

Rounding down

Always round panel and box quantities up.

Using only square footage

Panel width and box quantity must also be considered.

Subtracting every outlet and switch

Small openings do not meaningfully reduce the panel quantity.

Ignoring the panel length

Confirm that the panel length works with the wall height and planned finishing details.

Forgetting the final cut

The last panel may need to be trimmed to fit the remaining wall width.

Ordering separate batches

Separate orders may show minor finish or color variation.

Not planning around doors and windows

Irregular walls should be divided into separate measurable sections.

A Simple Measurement Checklist

Before placing an order, confirm the following:

1. Define the exact wall area to be covered.
2. Measure the width in at least three places.
3. Measure the height in at least three places.
4. Use the largest relevant measurement.
5. Confirm the selected panel dimensions.
6. Divide the wall width by the panel width.
7. Round up to a complete panel.
8. Convert the panel quantity into complete boxes.
9. Review doors, windows, corners, and outlets.
10. Plan the first and final panel cuts.
11. Decide whether the project needs additional material.
12. Purchase the complete project quantity together.

Final Thoughts

Accurate measurement makes the ordering and installation process simpler.

For a standard vertical installation, begin by confirming the wall height and then calculate the number of panels across the wall width.

NORDAN Full Wall panels are approximately 280 mm wide and are supplied as two panels per box. Divide the wall width by 280 mm, round up to the next full panel, and then round the box quantity up again.

Complex walls should be divided into separate sections, while small outlets and switches should generally be treated as cutouts rather than deducted from the order quantity.

Before ordering, review the final layout and purchase the complete quantity needed for the project at the same time.