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Wallpaper calculator

How many wallpaper rolls should I plan to buy?

Before you startMeasure the wall run and height, then copy roll width, roll length, and repeat from the product label.

Step 1

Add your measurements

Estimate full drops and rolls while allowing for pattern matching.

Example numbers are loaded

Replace each example with what you measured. The example result on the right updates as you type.

Measure the wallsUse the full wall run to be covered.

Wall perimeter to covercmAdd the widths of every wall section to be papered.Wall heightcmUse the tallest floor-to-ceiling measurement.

Read the roll labelPattern repeat can materially change the quantity.

Roll widthcmCopy the full roll width from the product label.Roll lengthcmCopy the total length of one roll.Pattern repeatcmCopy the vertical pattern repeat. Use a very small value for free-match paper.Extra allowance%Allow extra for cuts, damaged sections, and matching.

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Example resultLooks good on paper

Plan for about 8 rolls

Buy the same batch where possible and verify the manufacturer's matching instructions.

Change the sample measurements to turn this into your estimate.

Adjusted drop: 256 cm
Drops required: 23
Drops per roll: 3

Proportional planning schematic - verify all dimensions on site.

Before you buy or start work

Confirm whether the pattern is straight, offset, or free match.
Check roll dimensions on the exact product.
Keep one unopened roll until installation is complete.

Method

What this result assumes

Each drop is rounded up to the next full pattern repeat.

Openings are not deducted because offcuts may not replace full drops.

Limitations

What it cannot confirm

Pattern matching, wall irregularity, batch variation, and installer method can increase material needs.

This is a planning estimate, not a building-code, safety, installation, or delivery guarantee.

Confirm product-specific requirements with the manufacturer, installer, retailer, or qualified trade.

Formula 1.0.0Reviewed 2026-07-13General planning assumptions

Read category methodology