# Wallpaper Calculator

Estimate whole drops and rolls with pattern repeats.

[Open this tool](https://whatson.pk/wallpaper-calculator/)

Category: Construction

Wallpaper rolls are constrained by full height drops and pattern matching. Dividing wall area by roll area can miss those losses.

Enter the wall heights, roll dimensions and pattern repeat. Review whole drops for each height before comparing the roll quantity with the room schedule.

## Inputs and controls

* Measurement unit: Feet; Metres; Inches; Centimetres; Millimetres
* Roll width (m). Allowed range: 0.01 to 10
* Roll length (m). Allowed range: 0.1 to 1000
* Vertical pattern repeat (m). Allowed range: 0 to 10
* Trim allowance per drop (m). Allowed range: 0 to 10
* Ordering allowance (%). Allowed range: 0 to 100. Added once to the measured requirement.
* Price per roll (PKR / roll). Allowed range: 0 to 1000000000. Optional. Enter your own supplier quote.
* Wall
* Width. Allowed range: 0.001 to 100000
* Height. Allowed range: 0.001 to 100000
* Quantity. Allowed range: 1 to 1000

## How to use

* Choose measurement unit.

* Enter roll width, roll length, vertical pattern repeat, trim allowance per drop, ordering allowance and price per roll.

* Add the entries in wall schedule as separate rows. Include wall, width, height and quantity for each row.

* Select Calculate estimate. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Counting drops gives a more practical purchase estimate when the pattern repeat consumes part of every cut.


## Before relying on the result

Whole-height drops are counted. Doors and windows are not deducted, and leftover drops are not shared between different heights.


## Tool limitations

Whole-height drops are counted. Doors and windows are not deducted, and leftover drops are not shared between different heights.

## Questions

### Are windows and doors deducted?

No. This calculation retains whole height drops. Openings and reusable offcuts need a separate practical hanging plan.

### What should I check before using Wallpaper Calculator?

Check Measurement unit, Roll width, Roll length and Vertical pattern repeat. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T14:08:57+00:00

This profile describes the tool. It does not execute it or supply a professional certification.