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Home, building & household

Wallpaper calculator

Calculate wallpaper rolls including waste.

Your result

Complete the fields and calculate.

Calculation method and formula

round up(Wall area [m²] × (1 + Waste/pattern [%] ÷ 100) ÷ (Roll length [m] × Roll width [m]))

Understand the inputs

Wall area
Unit: m². Use a measured value or your own assumption.
Roll length
Unit: m. Use a measured value or your own assumption.
Roll width
Unit: m. Use a measured value or your own assumption.
Waste/pattern
Unit: %. Use a measured value or your own assumption.

Assumptions and limitations

This estimates rolls by area. Wall height, full drops, pattern repeat and offset matching can require more rolls than area alone suggests.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Wall area
85 m²
Roll length
10.05 m
Roll width
0.53 m
Waste/pattern
15 %
Example result19 rolls

Guide value: materials, specifications and regional prices can vary.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Wallpaper calculator work?+

round up(Wall area [m²] × (1 + Waste/pattern [%] ÷ 100) ÷ (Roll length [m] × Roll width [m])). This estimates rolls by area. Wall height, full drops, pattern repeat and offset matching can require more rolls than area alone suggests.

What assumptions should I consider for this result?+

This estimates rolls by area. Wall height, full drops, pattern repeat and offset matching can require more rolls than area alone suggests. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

Toolbox

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