Shelf Spacing Helper
Plan shelf layouts with even gaps or maximum shelves by gap size
Unit System & Presets
Cabinet Dimensions
Enter the interior measurements of your cabinet or bookcase
Spacing Method
Choose how you want to calculate shelf positions
Optional Settings
When enabled, gaps are distributed evenly including the space below the first shelf. For N shelves, creates N+1 equal gaps (recommended for realistic cabinet spacing).
Enter Cabinet Dimensions
Fill in the interior height and shelf thickness to calculate shelf positions
Calculation Methods
Even gaps: G = (H - B - T - N×t) / N
Max shelves: N = floor((H - B - T) / (t + S_target))
Legend: H=height, B=bottom, T=top, N=shelves, t=thickness, G=gap
About this calculator
Shelf Spacing Helper: A cabinet-layout calculator for evenly distributed shelf heights.
How it works
- Enter total internal height and panel thickness values.
- Set shelf count or target gap dimensions.
- The tool returns consistent shelf spacing and placement marks.