Wallpaper, curtains and patterned fabrics.
Preserve drops, pattern repeats and whole fabric blanks rather than pooling square metres.
Choose the matching calculation
Wallpaper Rolls Calculator
Count full-height wallpaper drops with pattern repeat, trim and matching allowance.
Half-Drop Wallpaper Cut Calculator
Compare alternating wallpaper drop phases with a half-repeat offset and count fixed-length roll pairs.
Box Cushion Fabric Panel Calculator
Calculate rectangular top, bottom and boxing panel area with your specified seam allowances.
Straight Repeat Fabric Panel Layout Calculator
Order matched rectangular fabric panels on a straight repeat grid using usable roll width and two repeat directions.
Mixed Height Wallpaper Roll Allocation Calculator
Allocate straight-match wallpaper drops of different heights to rolls after repeat rounding and initial alignment loss.
Curtain Fabric Cut Order Calculator
Plan full fabric widths and repeat-aligned curtain drops from your own specification.
Centred Wallpaper Strip Layout Calculator
Compare centring a wallpaper strip with centring a seam before cutting drops.
Measure and check your assumptions
Round curtain fabric widths before multiplying by drop length
Why can a curtain order exceed finished coverage area divided by fabric width?
Compare a centred wallpaper seam with a centred strip
Does centring the pattern require one more full strip?
Add seam allowance to both dimensions of each cushion panel
Why is finished cushion surface area smaller than the fabric cut area?
Keep horizontal and vertical straight repeats separate
Why can a vertical repeat allowance alone miss a fabric width constraint?
Allocate different wallpaper drop heights before buying rolls
Why can average wall height give the wrong straight-match roll count?
Treat wall openings differently for paint and wallpaper
Why does subtracting opening area not automatically save full wallpaper drops?
Understand paired cuts for half-drop wallpaper
Why do alternating half-drop phases have different source cut lengths?
Keep the estimate within scope
Use your measured geometry and already supplied product specifications. Counts and quantities do not select a construction system or establish code compliance.
Collect chosen results in a free browser material project. Alternative scenarios remain separate orders.