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USER-GENERATED FREE-TOOL DOCUMENT. All information is entered or selected by the user; drawings and calculations are generated from those inputs. It is not prepared, checked or approved by JP Medati Interior Design Studio. The logo identifies the free tool only. JP Medati Interior Design Studio accepts no responsibility for the data, results or their use. Verify all details independently before ordering or carrying out work.

Measuring guide and help ↗

Interior Design Tools

Wallpaper Calculator

Calculate complete drops and whole rolls, including pattern alignment, trimming and ordering allowance.

Wall coverage

Wallpaper roll

Order calculation

5whole rolls to order
Gross wall area
13.00
Net paper area
13.00
Aligned cut length
2.70 m
Complete drops required
10
Drops per roll
3
Rolls before allowance
4
Important measuring rule

Ordinary doors and windows reduce the net area but normally do not remove complete drops: offcuts are still needed above and below the aperture. Only enter a full-height excluded width when that opening genuinely replaces complete strips. For half-drop or unusual matches, confirm the manufacturer's label and add extra allowance if required.