Wallpaper Calculator
Estimate wallpaper rolls for your room
Length of the room
Width of the room
Height of walls
Standard: 33 ft
Standard: 20.5 in
0 for random match
Wall Area
—
sq ft
Strips per Roll
—
strips
Total Strips Needed
—
strips
Rolls Needed
—
rolls
How to Use This Calculator
Wallpaper estimation is trickier than paint because of pattern matching. Our calculator accounts for pattern repeat.
- Measure room dimensions
- Check wallpaper roll specs
- Enter measurements
- Buy all rolls from same dye lot
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Wall area = 2 x (L + W) x H
Strips = Perimeter / Roll width
Strips per roll = Roll length / (Height + Pattern repeat)
Frequently Asked Questions
How many rolls of wallpaper do I need?
A standard US double roll (33 ft x 20.5 in) covers about 56 sq ft. For a 12x10 room with 8 ft ceilings, you need approximately 6-8 double rolls.
What is pattern repeat?
Pattern repeat is the vertical distance before the pattern repeats. Large repeats waste more paper for matching.