Wallpaper Rolls
“How many rolls, and does the pattern repeat change it?”
How many rolls — with the drop arithmetic done in the open, the waste shown as a percentage, and exactly how many extra rolls the pattern repeat is costing you. Which is the number every retailer's calculator quietly leaves out.
- Drop-by-drop working, drawn, with the trimmed-off part shaded
- Handles free, straight and half-drop match — the half-drop is where the extra roll comes from
- Tells you how many rolls a plain paper would have needed, and the price difference
- Counts doors as saved drops and windows as saving nothing, which is how paper really works
- Metres or feet, three roll-size presets, and a warning about batch numbers
- This one is finished and tested — not on the build list
- It will be $9, same as every other tool
- One email when it goes up, no list, no spam
Three steps, then you're done
Total width, floor to ceiling, plus your trim allowance.
Length, width, repeat and match type — they are not standard.
Over about 30% and a different paper will cost you less.
Questions
Do I need to install anything?
No. Each tool is a single file. Double-click it and it opens in Chrome, Edge, Safari or Firefox — whichever you already have. No account, no password, no software.
Does anything get uploaded?
No. Your numbers and files never leave your computer — the tools have no way to send them and no internet connection is needed to run them. You can switch your wi-fi off and they still work.
I'm not good with computers. Is this too hard?
The first thing every tool does is walk you through it in five short screens with pictures. Then there's a button that fills it with example numbers so you can watch it work before touching anything.
Will it work on my phone?
Yes. Email yourself the file and open the attachment, or drop the files in iCloud Drive, Dropbox or Google Drive and open them from there — then they're on every device you own.