Wallpaper rolls for one wall

MEASURE FIRST

How to prepare your inputs

Measure the surfaces being painted, deduct excluded openings and enter the paint’s coverage for that surface and coat system.

How this calculation works

Drop length = height + trim, rounded up to whole repeats when repeat > 0. Drops required = ceil(wall width ÷ roll width). Drops per roll = floor(roll length ÷ drop length).

Assumptions & exclusions

One wall, straight match and full-width drops only. No deduction for openings. Excludes half-drop, reverse hanging, borders, corner overlap and initial pattern alignment; these may need extra rolls. Confirm batch and supplier take-off.

Your next step

Confirm preparation, primers, number of coats and available tin sizes with your painter or supplier.

Further reading

• Porter’s Paints wallpaper specification

These resources provide background information. Confirm current product specifications and project requirements with your supplier or trade professional.

What if my shape or product is different?

Use dimensions and product data that match the stated method. For complex work, calculate separate sections or obtain a project-specific take-off. Do not apply simple geometry to structural or compliance decisions.

Why are quantities rounded up?

Whole bags, packs, sheets or cartridges round up to purchasable units. Decimal area or volume results are planning figures; confirm order increments with the supplier.

Are my entries saved?

No. Entries remain in the current browser page and clear on reload. Printing can save your results and inputs as a PDF on your device.