How many rolls of wallpaper do you need? Calculate with pattern repeat.
This wallpaper calculator determines exactly how many rolls you need for your room. It accounts for doors, windows, custom roll sizes, and pattern repeat — which causes extra waste when matching designs between strips. Standard European rolls are 10m × 0.53m (5.3 m²). The calculator divides room perimeter into strips, calculates how many strips fit per roll (accounting for height and pattern repeat waste), and rounds up. Perfect for interior designers, DIY decorators, and homeowners planning wallpaper projects. All calculations are instant and private — no data leaves your browser. European standard rolls are 10m × 0.53m, while American rolls are typically 10m × 0.68m. Pattern repeat is the most common source of waste — a 64cm repeat can waste 20-30% more wallpaper per strip.