Wallpaper Calculator – Estimate Wallpaper Needed for Your Wall
Wallpaper Roll Calculator
Calculator Features
- • Accurate roll calculations with pattern repeat
- • Professional installation considerations
- • Waste factor calculations
- • Mobile-friendly interface
Why Use a Wallpaper Roll Calculator?
Accurate wallpaper estimation is key to a successful project. Ordering too few rolls can lead to mismatched patterns or out-of-stock issues.
Ordering too many? That's unnecessary cost. Our wallpaper calculator helps you avoid both.
By factoring in wall dimensions, roll size, and even pattern repeat, it gives you a reliable roll count tailored to your space. Whether you're decorating a single accent wall or an entire room, this tool ensures precise planning, minimizes waste, and saves you money and time.
It's especially useful for premium or custom wallpapers where precision matters most.
Wallpaper Calculation FAQ & Pro Tips
Do I need to include pattern repeat?
Yes. If your wallpaper has a repeating pattern (also called pattern match), it's critical to include the repeat height in your calculation. This ensures each strip aligns properly and avoids mismatched designs on the wall. Our calculator adjusts drop length based on the repeat value you provide.
What about overlap or double-cut seams?
Professional wallpaper installers often use a double-cut method or allow a small overlap (0.5–1 inch) between strips to ensure seamless joints — especially with textured, grasscloth, or mural wallpapers. Be sure to account for this by adding 1–2% extra to your total height per strip.
What if my wall has windows, doors, or cutouts?
For small cutouts (like outlets or switches), don't subtract from your total — the waste is minimal. But for large obstacles (like windows or built-ins), you can subtract their area — but only if the wallpaper pattern isn't continuous across them. When in doubt, round up.
Should I order extra wallpaper?
Absolutely. We recommend ordering 10–15% extra for trimming, adjustments, and potential future repairs. Some patterns (like large-scale murals or diagonal repeats) may require even more. It's always better to have a bit extra from the same batch to ensure color consistency.
Can I use this calculator for multiple walls?
The calculator works best for one wall at a time. If you have several walls, calculate each individually and add the totals. Multi-wall functionality is coming soon!
Any tips for angled walls or ceilings?
For angled ceilings or sloped walls, use the maximum height to calculate — it's safer to overestimate than come up short. Consider extra waste in areas that require diagonal cuts.
Not Sure About Your Measurements?
If you're unsure about your wallpaper roll calculation — we're here to help. Whether you're dealing with complex walls, sloped ceilings, or specialty patterns, our experts can double-check your numbers and give professional guidance for free. Just reach out using the form below — we respond fast!
