Wallpaper Calculator

Estimate strips and rolls with straight pattern matching.

Measurement guide

Measure wall width and full hanging height, then use the trimmed roll width and length from the label.

Record each area separately, keep units consistent, and update the estimate with a final site measurement before ordering.

Assumptions and limitations

The model supports no-match and straight-match repeats, not drop-match layouts; damaged strips and openings may not be reusable.

Prices, tax, and delivery are user-entered planning figures, not supplier quotations.

Worked example

On a 12 ft wall with 21 in rolls, about seven strips span the wall. An 8 ft drop plus repeat allowance determines how many full strips each roll yields.

Frequently asked questions

What waste allowance should I use?

Simple rectangles often start at 5–10%; complex patterns, many cuts, or fragile material justify more based on the installation plan.

Why is the purchase quantity rounded up?

Packages and whole pieces usually cannot be bought fractionally, so purchasing rounds up while the exact quantity remains visible.

Can I order directly from this result?

Not without verification. Re-measure, check the product label, batch and stock, and confirm with the supplier or a qualified professional.

What does the cost estimate include?

Material cost uses the rounded purchase quantity, then adds entered labor, delivery, and tax; unlisted accessories are excluded.