Interior Design

Wallpaper Calculator

Wallpaper roll estimator for any room. Enter dimensions, roll size, pattern repeat, and openings to get an accurate roll count before you start pasting.

Unit system

Room dimensions

Length

Width

Ceiling height

Doors

Windows

Roll details

Roll width

US standard is 21 in wide

Roll length

Single rolls are typically 33 ft long

Pattern repeat

Enter 0 for solid or random-match papers

Extra waste allowance

10% for plain, 15–20% for large repeats

Your estimate

Wall area: 301 sq ft
Usable per roll: 52 sq ft
Rolls to buy: 6 rolls

How this calculator works

Enter room length, width, and ceiling height — we calculate wall area minus doors and windows.
Add your roll width and length from the product label (21 in × 33 ft is the US standard).
Set pattern repeat for match papers; use 0 for random or solid designs.
Add 10–20% waste for trimming and pattern matching. Results round up to whole rolls.

Step-by-step how-tos with tips from real projects.

Bright small living room with light colors and multi-functional furniture

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By Rachel Adams · Feb 12, 2026

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By Rachel Adams · Jun 10, 2026

Interior Design

Wallpaper Calculator

Wallpaper roll estimator for any room. Enter dimensions, roll size, pattern repeat, and openings to get an accurate roll count before you start pasting.

Unit system

Room dimensions

Length

Width

Ceiling height

Doors

Windows

Roll details

Roll width

US standard is 21 in wide

Roll length

Single rolls are typically 33 ft long

Pattern repeat

Enter 0 for solid or random-match papers

Extra waste allowance

10% for plain, 15–20% for large repeats

Your estimate

Wall area: 301 sq ft
Usable per roll: 52 sq ft
Rolls to buy: 6 rolls

How this calculator works

Enter room length, width, and ceiling height — we calculate wall area minus doors and windows.
Add your roll width and length from the product label (21 in × 33 ft is the US standard).
Set pattern repeat for match papers; use 0 for random or solid designs.
Add 10–20% waste for trimming and pattern matching. Results round up to whole rolls.

Step-by-step how-tos with tips from real projects.

Interior Design10 min read

Small Living Room Design Ideas That Feel Spacious

Twelve by fourteen feet is a normal living room now — not a design failure. Scale, light, and ruthless editing make tight spaces feel calm instead of cramped.

By Rachel Adams · Feb 12, 2026

Interior Design9 min read

Bedroom Interior Design: A Weekend Refresh Without New Furniture

You do not need a new bed frame to fix a bedroom that feels flat. Paint, bedding layers, better light, and one honest declutter pass can change how the room feels by Sunday night.

By Rachel Adams · Jun 10, 2026

Room dimensions

Roll details

Your estimate

How this calculator works

Guides that use this calculator

Small Living Room Design Ideas That Feel Spacious

Bedroom Interior Design: A Weekend Refresh Without New Furniture

Room dimensions

Roll details

Your estimate

How this calculator works

Guides that use this calculator

Small Living Room Design Ideas That Feel Spacious

Bedroom Interior Design: A Weekend Refresh Without New Furniture