01
Enter your room size
Input the square footage of your space. We use this physical baseline to calculate the visual weight of the room.
Free 60-30-10 Rule Calculator:Perfect Your Room's Color Proportions
Stop guessing how much of each color to use. Enter your room size and select your colors to get an exact square-footage breakdown for your walls, furniture, and decor. Free, instant, and no signup required.
Your 60-30-10 Rule Palette Generator
Your Result
Choose your colors
Pick all three colors to analyze the 60-30-10 harmony
You know the exact math.Now, what does it actually look like?
Knowing you need exactly 60 square feet of your secondary color is incredibly helpful for shopping. But buying curtains and a chair just to hit a quota can still result in a room that feels disjointed if the textures and placements are wrong.
Upload a photo of your room and watch our AI apply your exact 60-30-10 color ratio to your walls, furniture, and decor—in your actual lighting—before you buy a single pillow or gallon of paint.
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Why knowing the 60-30-10 ruleisn't enough to fix your room.
The 60-30-10 rule is the oldest trick in the interior design playbook. It states that 60% of a room should be a dominant base color, 30% a secondary color, and 10% an accent color.
But here is the problem: human brains are terrible at estimating spatial volume. When DIY decorators try to apply this rule, they usually end up making their secondary color take up 50% of the room, or they buy so many "accent" pillows and rugs that the room looks like a chaotic funhouse.
Our calculator bridges the gap between abstract percentages and physical reality. By converting the golden ratio into hard square footage, it tells you exactly how much visual space each color should occupy.
Simple inputs.Perfect visual harmony.
02
Assign your color palette
Select which color will serve as your 60% base, your 30% secondary, and your 10% accent.
03
Preview your balanced space + get your room breakdown
Instantly visualize your colors in a realistic AI room render while seeing exactly how much space each color should cover and where each furniture and decor category belongs.
Translating percentages
into square feet
"Use 10% for an accent" is vague advice. Telling you that your accent color should only cover exactly "20 square feet" gives you a strict, physical limit
This stops you from over-purchasing colorful decor that will eventually clutter the space.
Kitchen
Built-in decorating cheat sheet
What counts as the 30%? Our result card doesn't just give you the math; it provides a professional breakdown of exactly which physical items (like curtains, accent chairs, or rugs) you should use to fill your dominant, secondary, and accent square footage.
Test the balance before you buy
Visual weight is tricky. A dark navy 30% will feel much heavier in a room than a light sage green 30%.
Upload a photo of your space, and our AI will render your exact proportions into the room realistically. Make sure the balance feels right to your eye before you start redecorating.
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DesignSense AI — Everything You Need to Visualize Your Home Renovation
The color proportion calculator is just the start. Here’s what’s included in your free account:
Interior Design Color Palette Generator
Generate balanced color palettes for any interior style
Paint Calculator
Estimate paint quantity, wall coverage, and project costs
Paint Color Undertone Finder
Identify warm, cool, or neutral paint undertones
AI Room Redesign
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Homeowners
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Interior Designers
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Common questions, answered
It is a classic decor rule that helps create a balanced color scheme. 60% of the room should be a dominant color (usually walls and large foundation pieces), 30% should be a secondary color (upholstery, window treatments), and 10% should be an accent color (throw pillows, artwork, accessories).
Usually, yes. If your ceiling is painted white and your walls are a light neutral, they collectively make up the 60% dominant visual weight of the room. If you paint a dark, dramatic ceiling, it will likely act as your 30% secondary color.
Yes! You can use the "60-30-10 plus 1" rule. You can split the 10% accent category into two different colors (5% and 5%), or use different shades/tones of the same secondary color.
Because hitting the square-footage math is only part of the equation. Lighting, texture, and furniture placement change how colors interact. The AI render allows you to see all three colors layered together in your exact room before you commit to non-refundable furniture.
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