Wallpaper Calculator

This tool counts the rolls of wallpaper a room needs, which is not the same sum as wall area divided by the area printed on the roll. You enter the wall run you are papering, the ceiling height, the pattern repeat and the roll size, and it returns the cut length of one strip, how many strips come off a roll, the rolls to buy and how much paper the repeat throws away. A second option shows what a single roll covers, so two papers with different repeats can be compared before you buy. Doors and windows are not deducted, because the wall above a door still takes paper from the same strip run.

Calculator Type

Measurements In

Feet for the wall and the roll, inches for the repeat and the width Metres for the wall and the roll, centimetres for the repeat and the width

A blank roll box falls back to the American roll, 20.5 in wide by 33 ft long.

Measure the wall run you are papering and the height, then take the repeat and the roll size off the label.

Wall Run to Paper (ft) *

Add up the width of every wall being papered. All four walls of a 16 ft by 8 ft room is 48 ft; all four walls of a 5 m by 2.5 m room is 15 m.

Wall Height (ft) *

Pattern Repeat (in)

The vertical repeat printed on the roll label, in inches. Leave at zero for a random match.

Pattern Match

Roll Width (in)

Off the label, in the unit chosen above. A US double roll is 20.5 in; a European roll is 53 cm. Left blank you get whichever of the two matches the choice.

Roll Length (ft)

A US double roll is about 33 ft; a European roll is 10.05 m, which is very nearly the same paper. Left blank you get the one that matches the choice above.

Trim Allowance per Strip

Spare at the top and bottom of each strip for an uneven ceiling and skirting. Two inches each end is usual, or 5 cm each end. Left blank it is 4 in, or 10 cm.

Price per Roll ($)

Leave at zero for a roll count with no cost.

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Measurements In

Feet for the wall and the roll, inches for the repeat and the width Metres for the wall and the roll, centimetres for the repeat and the width

A blank roll box falls back to the American roll, 20.5 in wide by 33 ft long.

How far a single roll goes once the repeat and the trim are taken off. Useful for comparing two papers before you buy.

Wall Height (ft) *

Pattern Repeat (in)

The vertical repeat printed on the roll label, in inches. Leave at zero for a random match.

Pattern Match

Roll Width (in)

Off the label, in the unit chosen above. A US double roll is 20.5 in; a European roll is 53 cm. Left blank you get whichever of the two matches the choice.

Roll Length (ft)

A US double roll is about 33 ft; a European roll is 10.05 m, which is very nearly the same paper. Left blank you get the one that matches the choice above.

Trim Allowance per Strip

Spare at the top and bottom of each strip for an uneven ceiling and skirting. Two inches each end is usual, or 5 cm each end. Left blank it is 4 in, or 10 cm.

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