Wallpaper Calculator

Calculate wallpaper rolls needed for any room. Accounts for pattern repeat, doors, windows, and waste. Includes 8 wallpaper styles with pricing.

Room Walls

Width (ft)

Height (ft)

Doors

Windows

Width (ft)

Height (ft)

Doors

Windows

Width (ft)

Height (ft)

Doors

Windows

Width (ft)

Height (ft)

Doors

Windows

Pattern Repeat

Wallpaper Style

Custom Price/Roll (optional)

Single Rolls

(4 double rolls)

Coverable Area

336 ft²

+15% waste

Wallpaper Cost

$315.00

$0.94/sq ft

Total w/ Paste

$345.00

2 gal paste

Wall-by-Wall Breakdown

Wall	Dimensions	Gross Area	Openings	Net Area
Wall 1	12′ x 8′	96 ft²	-12 ft²	84 ft²
Wall 2	12′ x 8′	96 ft²	-12 ft²	84 ft²
Wall 3	12′ x 8′	96 ft²	-12 ft²	84 ft²
Wall 4	12′ x 8′	96 ft²	-12 ft²	84 ft²
Total		384 ft²	-48 ft²	336 ft²

Wallpaper Style Guide

Solid / Textured

$30.00/roll

No pattern matching needed

Small Print

$45.00/roll

Repeat under 12 inches

Geometric

$55.00/roll

Regular repeating pattern

Large Floral

$65.00/roll

Repeat 12-24 inches

Mural / Scenic

$85.00/roll

Large repeat or full wall design

Peel & Stick

$35.00/roll

Removable, easy install

Grasscloth

$75.00/roll

Natural texture, no pattern

Vinyl

$40.00/roll

Durable, moisture-resistant

Wallpapering Tips

Standard Roll

20.5" x 33'

~56 sq ft per single roll

Standard Door

3' x 7'

21 sq ft deducted per door

Standard Window

3' x 4'

12 sq ft deducted per window

Buy Extra

1-2 rolls

Same dye lot for repairs later

Pattern Matching

Adds waste

Larger repeats waste more paper

Prep Walls

Clean & prime

Smooth walls ensure best adhesion

How to Use Wallpaper Calculator

1Enter wall dimensions
2Set pattern repeat length
3Subtract doors and windows
4View rolls and cost estimate

Frequently Asked Questions

How many rolls of wallpaper do I need?▾

Measure total wall area, subtract doors/windows, divide by roll coverage (56 sqft per double roll). Add 10-20% for pattern matching waste.

What is a wallpaper pattern repeat?▾

Pattern repeat is the distance before the design repeats. Larger repeats (21-24 inches) create more waste. Straight matches are easier; drop matches need extra rolls.

How much wallpaper paste do I need?▾

One packet covers approximately 4-5 rolls. Pre-pasted wallpaper only needs water activation. Non-woven wallpaper uses paste applied to the wall instead.

About Wallpaper Calculator

Calculate wallpaper rolls needed for any room. Accounts for pattern repeat, doors, windows, and waste. Includes 8 wallpaper styles with pricing.

NexTool's Wallpaper Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.