Planning a room should not require a design degree.
These free room planning tools help you make confident decorating decisions — from choosing the right wall art size to finding the perfect proportions for any space.
Think of each one as a decor sizing guide that does the math so you can focus on the fun part.
Every tool runs in your browser, gives you instant results, and requires no signup or email.
Home Decorating Tools
Wall Art Size Calculator
Find the right wall art dimensions for above your sofa, bed, fireplace, console table, or any open wall. Enter your furniture or wall width, choose your arrangement style, and get a recommended size range with hanging height and nail placement — all based on standard interior design proportions.
- Works for single pieces, pairs, and triptych arrangements
- Calculates hanging height and nail placement automatically
- Supports inches and centimeters
- Includes a complete wall art size guide with room-by-room tips
What’s Coming Next
We are building more free home decor tools based on the questions homeowners ask most often, including a furniture spacing calculator and other room planning tools.
Here is what is in the works:
Curtain Size Calculator
One of the most common curtain sizing mistakes is hanging panels that are too narrow, leaving a flat, deflated look that cheapens the whole room.
Our curtain size calculator solves this by applying the standard fullness rule designers use: your total fabric width should be at least two times the width of your window.
Enter your window measurements, and the tool gives you the ideal rod length, recommended fabric width with proper fullness, and the correct curtain drop based on whether you want a float, break, or puddle hem.
It also adjusts rod placement height so your windows look taller and lets you toggle between inches and centimeters.
No more guessing at the store.
Rug Size Calculator
An undersized rug is one of the most frequent decorating mistakes, making even expensive furniture look disconnected and a room feel unfinished.
Our rug size calculator fixes this by using the layout rules interior designers follow: in a living room, all front furniture legs should sit on the rug with an even border of bare floor around the edges, typically 18 to 24 inches.
Select your room type — living room, bedroom, or dining room — and enter your furniture dimensions.
The tool recommends a standard rug size that fits your layout and shows exactly how to position it relative to your sofa, bed, or table.
It takes the guesswork out of a decision most people only get one shot at.
Room Color Palette Generator
Choosing paint colors without a plan is how rooms end up feeling scattered or flat, with accents that clash and walls that overwhelm the furniture.
Our room color palette generator uses the 60–30–10 rule that designers rely on: 60 percent of the room in a dominant color, 30 percent in a secondary shade, and 10 percent in an accent.
Pick a starting color, a mood, or even a photo you like, and the tool builds a balanced palette with specific hex codes for your dominant walls, secondary upholstery or textiles, and accent decor.
It also flags combinations with poor contrast and suggests neutrals that tie everything together so the room reads as intentional, not random.
Why Use Our Home Decor Tools?
Free, forever. Every tool is completely free to use, today and in the future. No premium tiers, no paywalls, no “enter your email to see results.” Just open the tool and get your answer.
No signup required. You do not need to create an account, verify an email, or hand over any personal information. Open the page, use the tool, and move on with your project.
Built for real decisions. These are not toy calculators. Every tool uses the same interior design proportions, spacing rules, and sizing guidelines that professionals rely on — packaged so you can use them without hiring one.
Have an idea for a tool you would find useful? Contact us.