Wall Square Footage Calculator
Planning to paint, wallpaper, or decorate your walls? Use this quick and accurate wall square footage calculator to measure total wall area in square feet. Just enter your wall dimensions and number of walls, and the calculator will estimate how much surface space you have.
This tool is ideal for DIY painters, interior decorators, and wallpaper planning. Knowing your exact wall area helps prevent overbuying or running out of materials during a home project.
Wall Square Footage Calculator FAQs
Here are some common questions people ask when estimating wall measurements for painting, wallpaper, or décor planning.
How do I calculate wall square footage manually?
Simply multiply the width × height of a wall to get the area. If you have multiple walls, repeat the calculation and add the totals — or use this calculator to do it instantly for you.
How many square feet does 1 gallon of paint cover?
On average, 1 gallon of paint covers around 350 square feet. Textured walls or darker colors may require more paint. This calculator includes a paint estimate based on that standard coverage rate.
How many wallpaper rolls do I need per wall?
A standard wallpaper roll covers about 60 square feet. Use the estimated roll count in this tool, and always round up for trimming and pattern alignment.
Should I include windows and doors in wall measurements?
For painting, most people do not subtract windows since trim and edges still require paint. For wallpaper or panels, you can subtract window/door areas for more precise material estimating.
What other calculators can help with room renovation planning?
You might also find these useful:
• Paint Coverage Calculator – estimate gallons needed.
• Concrete, Gravel & Mulch Calculator – ideal for flooring, outdoor walls, or landscaping projects.
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