Wallpaper rolls
Estimate full wallpaper drops and rolls from wall dimensions, trim and pattern repeat. Drag the graph handles to change inputs and explore the result.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Cut length per drop = + ; Straight match: ceil(Cut length per drop/) × ; Full-height drops = Σ ceil(/); Drops per roll = floor(/Cut length per drop)
- Worked example: 4 × 2.4 m; Rolls to buy 0.5 × 10 m; 0.1 m ⇒ 8 Full-height drops × 2.5 m; 4/Rolls to buy ⇒ 2 Rolls to buy
- Supported input limits: Entries: 1–20; : 1e-12 ≤ x ≤ 1,000,000,000,000; : 1e-12 ≤ x ≤ 1,000,000,000,000; : 0 ≤ x ≤ 1,000,000,000,000; : 1e-12 ≤ x ≤ 1,000,000,000,000
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
All entered lengths share the selected unit. Trim is added before straight-match rounding. Equal cut lengths share rolls; different lengths receive separate whole-roll allocations. Mixed-length cutting optimization, half-drop matching and deductions for openings are not included.
Sources
- OpenStax — rectangle areas and dimensional measures Sources reviewed: 2026-10-06
