Calculator · Furniture & cabinets
Bookshelf Capacity Calculator
The free Bookshelf Capacity Calculator answers one question: How many books fit, and how much they weigh. Enter your numbers in inches or millimeters and the result updates instantly in your browser, with no sign-up and no app to install. Use it on your phone at the bench, then copy or print the result for your cut list.
Use the weight result with the Shelf Sag Calculator to check your shelves won't bow.
Bookshelf Capacity
- Items per shelf
- 24
- Total items
- 120
- Load per shelf
- 48 lb
- Total load
- 240 lb
Pro tools · unlock
Which other furniture & cabinets calculators help with this project?
- Drawer Box Size Calculator — Drawer box dimensions for side-mount slides.
- Cabinet Door Size Calculator — Overlay door sizes for single and double doors.
- Furniture Height Calculator (Ergonomics) — Seat, table, desk and workbench heights.
- Face Frame Calculator — Stile and rail cut lengths for cabinet face frames.
What you'll need for this project
Tools
Screws & hardware
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Build it · Intermediate · 1 weekend
Download the complete plan with cut list and materials list (PDF)
Heavy-Duty Library Bookcase — Solid bookcase rated for 50+ lb per shelf, with hardwood front edges. Drawings, cut list with board-foot totals, hardware list and step-by-step instructions.