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
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
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.