Wallpaper Rolls Calculator

Enter the room size, the roll width and length and the pattern repeat. The calculator counts the strips, subtracts doors and windows and tells you how many rolls to buy.

7-in-1 Pro Calculators

±1% Formula Accuracy

EN/RU/ES 3 Languages

Wall & Ceiling Paint Estimator

Room Dimensions

Room Length m

Room Width m

Wall Height m

Include Ceiling?

Doors, Windows & Coverage

Number of Doors

Number of Windows

Number of Coats

Paint Coverage m²/L

Container Size L

Price per Container $

Ceramic & Porcelain Tile Estimator

Surface Dimensions

Area Length m

Area Width m

Tile Size, Waste & Packaging

Tile Length cm

Tile Width cm

Grout Joint Gap mm

Cutting / Waste Reserve %

Coverage per Box m²

Price per Box $

Laminate & Hardwood Flooring Estimator

Room Floor Dimensions

Room Length m

Room Width m

Plank Size, Pattern & Packaging

Plank Length cm

Plank Width cm

Installation Pattern (Waste %)

Area per Pack m²

Price per Pack $

Underlayment Price per Area $

Wallpaper Rolls & Paste Calculator

Room Dimensions

Room Length m

Room Width m

Wall Height m

Roll Dimensions & Pattern Repeat

Roll Width cm

Roll Length m

Pattern Repeat (Offset) cm

Number of Doors

Number of Windows

Price per Roll $

Drywall Sheets, Framing & Screws Estimator

Structure Type & Sheet Dimensions

Construction Type

Single Sheet Area m²

Wall / Room Length m

Height (or Ceiling Width) m

Price per Drywall Sheet $

Concrete Slab, Screed & Bags Calculator

Slab / Pour Dimensions

Slab Length m

Slab Width m

Thickness / Depth cm

Reserve, Pre-Mix Bags & Pricing

Spillage / Grade Reserve %

Dry Mix Bag Size kg

Price per Bag $

Appliance Electricity Cost Calculator

Appliance Power & Usage Schedule

Appliance Name

Power Consumption W

Hours Used per Day h

Days Used per Month 1–31

Electricity Rate (per kWh) $

Live Calculation Summary

Paint required

9.1 L

4 cans × 2.5 L

Net Requirement 88% / 12% Reserve / Deductions

Compare Current Material Prices:

Home Depot Lowe's Amazon DIY Leroy Merlin

My Renovation Shopping List & Budget

Category / Calculation	Required Quantity	Estimated Cost

Frequently asked questions

How many rolls of wallpaper do I need for a room?

Divide the room perimeter by the roll width to get the number of strips, work out how many strips one roll yields from the wall height, and divide. The calculator does all three steps for you.

How does the pattern repeat affect the number of rolls?

With a repeat (for example 32 cm) each strip must be cut longer so the pattern lines up. That reduces the strips per roll, so patterned wallpaper needs more rolls than plain.

What are the standard wallpaper roll sizes?

A common roll is 0.53 m wide and 10.05 m long. Wide rolls of 1.06 m are also sold. Enter your roll size in the calculator since sizes vary by brand and country.

Should I buy an extra roll of wallpaper?

Yes, keep one spare roll for repairs and mistakes, and check that every roll has the same batch number so the color is identical.