SettingsSettings for this calculationUS
Every roll going on the wall, including any lining paper.
Lining paper counts, and it is the step people forget: a room lined and then papered is hung twice, so the paste is for both. The wallpaper calculator gives the roll count if you are starting from the room.
Printed on the packet — five to six rolls is usual for a standard paper.
This is the figure that changes with the paper. A sachet rated five or six rolls of light printed paper hangs fewer of a heavy embossed, vinyl or textured one, because those are hung with a stronger mix. Papers that want an all-purpose or a fungicidal paste have their own ratings too. Take the number from the packet you are buying rather than the default here.
The volume one sachet is made up to, as the packet states it.
Used to size the bucket and report the water, not to count the sachets. The packet gives it, and it changes with the mix strength: the same sachet made up for a heavy paper goes into less water, which is what makes the paste stronger.
Which surface gets the paste. It changes the working, not much of the quantity.
Paste-the-wall papers have a backing that does not expand, so the paste goes straight on the wall and the paper goes up dry. The quantity is broadly similar — the paste still has to cover the same area — but the mix is usually made slightly stronger and the work is much faster, because there is no soaking time to keep track of.
Sachets of paste
2 sachets
2 sachet(s) covers 10 roll(s) exactly. Pasting the paper: allow the soaking time on the packet, and keep it the same for every length.
- Rolls covered
- 10 rolls
- Mixed paste
- 2.5 gal
- Water per sachet
- 1.25 gal
They open the calculator with your figures already in it
Wallpaper Paste Calculator: 2 sachets — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Paste powder is sold in sachets rated by the number of rolls they hang, so the count is the roll total divided by that rating, rounded up
- A sachet is made up to a stated volume of water — commonly 4.5 litres for a five to six roll sachet — and that volume, not the powder, is what fills the bucket
- Heavy, embossed and vinyl papers are hung with a stronger mix and fewer rolls per sachet than light printed papers; the packet's own rating already carries the difference
Inputs used
- Rolls to hang
- 10
- Rolls each sachet hangs
- 5
- Water per sachet
- 1.25 gal
- Method
- Paste the paper
Intermediate steps
- Rolls covered
- 10 rolls
- Mixed paste
- 2.5 gal
- Water per sachet
- 1.25 gal
Confidence note: 2 sachet(s) covers 10 roll(s) exactly. Pasting the paper: allow the soaking time on the packet, and keep it the same for every length.
What this calculation does not cover
- The sachet rating is the whole answer, and it belongs to the packet rather than to this page. A rating for a light printed paper applied to a heavy embossed one under-orders, which is why the field asks for it rather than assuming.
- Lining paper is a separate hang. A room that is lined and then papered takes paste twice, and the roll figure entered here has to include both.
- Mixed paste has a working life of a few days at most and cannot be kept between jobs. Spare capacity in the last sachet is not spare paste — an unopened sachet keeps, a made-up bucket does not.
- Ready-mixed tub paste is bought by volume rather than by sachet. Its container states the rolls it hangs, so enter that rating with a sachet count of one to read the answer as tubs.
- Nothing here covers the border adhesive, overlap adhesive or the size some walls need before hanging, and a wall that has not been sized can pull the paste out of the paper as it goes up.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-23 · v1.0.0
Regulatory standards & verification citations3
- Paste powder is sold in sachets rated by the number of rolls they hang, so the count is the roll total divided by that rating, rounded up
- A sachet is made up to a stated volume of water — commonly 4.5 litres for a five to six roll sachet — and that volume, not the powder, is what fills the bucket
- Heavy, embossed and vinyl papers are hung with a stronger mix and fewer rolls per sachet than light printed papers; the packet's own rating already carries the difference
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