WALLCANVAS
Give a wall a point of view — accent walls, wallpaper, and gallery-wall DIY.
From figuring out how much paint an accent wall really needs to counting wallpaper rolls, spacing a gallery wall, checking a panel count, and picking colors that actually contrast, WallCanvas pairs free hands-on wall-decor calculators with practical guides and a richly illustrated museum. Measure once, decorate with confidence.
Wall Decor Tools & Calculators
Free tools for every wall project — paint coverage calculator, wallpaper roll calculator, gallery wall spacing calculator, accent wall proportion calculator, panel/tile count calculator, and a color contrast checker.
Paint Coverage Calculator
Work out exactly how many gallons and quarts of paint you need for a wall or accent wall — dimensions, doors and windows, coats, and spread rate all factored in
Wallpaper Roll Calculator
Get an accurate roll count using the strip-based method professional installers use, including a pattern-repeat allowance so seams line up
Gallery Wall Spacing Calculator
Plan an even, centered grid of frames — enter your wall and frame sizes and get the margins plus the exact position of every frame
Accent Wall Proportion Calculator
See what share of a room's total wall area your chosen accent wall represents, checked against the common 20-35% balance guideline
Panel & Tile Count Calculator
Count exactly how many panels or tiles you need for shiplap, beadboard, or wainscoting, with joint gaps and a waste allowance built in
Color Contrast Checker
Check the exact contrast ratio between a wall color and its trim, art, or frames using the WCAG relative-luminance formula
Wall Art Museum
Wander an illustrated museum of the art and craft that has decorated walls for centuries — the history of murals and wall art, the patterns and motifs of wallpaper, the fresco painters of the Renaissance and beyond, and the wainscoting and paneling styles that have lined rooms for hundreds of years, each in its own gallery, so you can get to know the stories behind the walls around you: where each tradition came from, how it was made, and why it still shapes the way we decorate today.
Tour the museum →From the Journal
Fresh guides on accent walls, wallpaper, gallery-wall layouts, paneling, and color, plus practical tips for measuring, buying the right amount, and getting a clean finish.
How Much Paint Do You Need? A Room-by-Room Guide
The arithmetic behind buying the right amount of paint — gross area, openings, coats, and spread rate — with worked examples for a bedroom, an accent wall, and a whole living room.
Wallpaper 101: Pattern Repeat and Roll Math Explained
Why wallpaper is priced and measured in strips rather than square feet, what a pattern repeat actually does to your roll count, and how to avoid running short mid-project.
Gallery Wall Layouts That Actually Work: Grid, Salon, and Staircase
Three reliable gallery-wall layouts — the even grid, the salon-style mix, and the staircase run — and the measuring approach that keeps each one from turning into a wall of stray nail holes.
How to Choose an Accent Wall: The Focal-Point Rule
A practical method for picking which wall in a room deserves the bold color — the focal-point rule, the proportion check, and the two mistakes that make an accent wall backfire.
Peel-and-Stick vs Traditional Wallpaper: What DIYers Should Know
How removable peel-and-stick wallpaper actually compares to traditional pasted paper on cost, durability, and difficulty — and which rooms suit each one.
Wainscoting and Panel Styles: Picking the Right One for Your Room
A field guide to the most common wall-paneling styles — raised-panel wainscoting, beadboard, board-and-batten, and shiplap — and which rooms and budgets each one suits best.
Keep Learning
Practical know-how on paint and color, plain-language explainers on wallpaper and pattern, the craft behind murals and frescoes, and the styles and history of wall paneling — everything you need to dig deeper before you pick up a brush.
Visit the Learn hub →