Shelf Calculator
Calculate and convert with the Shelf Calculator. Free online tool, no installation required.
Shelf Span Calculator
Calculate safe shelf span and sag.
Tips
- Add center support for spans over 36 inches.
The Shelf Calculator is a free DIY tool that calculate shelving materials and spacing.. Plan your home projects with accurate estimates.
Key Features
Instant calculations
Cost estimation support
Waste factor included
Works on mobile at the job site
Accurate material estimates
No signup needed
Shelf Calculator
Review and shop
Use the estimate to buy the right amount of materials
Select material type
Choose the material or product you're using
Click Calculate
Get accurate material quantities instantly
Set waste percentage
Add extra for cuts and mistakes (typically 10%)
Enter project dimensions
Input the measurements of your project area
Use Cases
Paint and flooring calculations
Home renovation planning
Garden and landscaping projects
Craft and hobby projects
Frequently Asked Questions
Can I use metric units?
Yes, switch between metric and imperial easily.
Does it work offline?
Once loaded, yes — perfect for job sites.
How accurate are the estimates?
Very accurate when you provide correct dimensions. Always add 10% waste.
Is this tool free?
Yes, completely free for all DIY projects.
Tool Information
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