Every mural artist has been there. You're standing in front of a wall, sketch approved, deadline set — and you're guessing how many cans to order. Buy too few and you're running back to the store mid-project. Buy too many and your budget takes a hit. We built the Mural Paint Calculator to solve this problem once and for all.
How It Works
The Sketchar Mural Paint Calculator takes the guesswork out of mural planning in four simple steps.
Upload your sketch.
Drop in your mural design — any JPG or PNG. The system instantly analyzes every color in your image, detecting even subtle gradients and identifying the exact percentage each color takes up in the composition.
Choose your spray paint brand.
Select from MTN 94, Montana BLACK, Montana GOLD, Molotow, or Loop. The calculator matches every color in your sketch to the closest real paint color from that brand's palette. We're adding more brands regularly — if yours isn't listed yet, let us know.
Set your wall dimensions and surface.
Enter the width and height of your wall in meters, then choose the surface type: smooth plaster, brick, rough concrete, or wood. Each surface has a different paint absorption rate, and the calculator adjusts automatically — a brick wall needs roughly 50% more paint than a smooth one.
Get your results.
Hit Calculate and the tool delivers a complete breakdown: every color matched to a specific spray can from your chosen brand, the exact number of cans you need for each color, and the total estimated cost of your project.
The Color Picker — Match Any Spot on Your Design
Here's a detail mural artists will love: click anywhere on your uploaded image and the calculator identifies that exact color, then suggests the closest match from every supported brand. Found a shade you like from a different manufacturer? Add it straight to your project estimate. This makes it easy to mix brands when you want a specific color that one brand nails better than another.
Built for the Mural Art Community
The Mural Paint Calculator is free to use at sketchar.io/paint-calculator. We built it because we're artists too, and we know that planning a mural shouldn't require a spreadsheet.
This is a community-driven tool. If you have ideas for improvements — more brands, more surface types, coverage adjustments, new features — we want to hear from you. Drop us a line at hello(at)sketchar.io and help us make this the best paint calculator for mural artists worldwide.
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