Fence Calculator for Wood Fences
Estimate posts, rails and pickets or panels using the spacing and material dimensions from your actual plan. No hidden structural defaults are assumed.
What this estimator calculates
The tool estimates regularly spaced line posts across the entered fence length, then adds any extra posts you explicitly enter for gates, corners or terminal conditions. Gate/opening width is removed from the infill length before estimating pickets or panels.
Core formulas
base posts = ceiling(total fence length ÷ post spacing) + 1
net infill = total fence length − gate/opening width
pickets = ceiling(net infill inches ÷ (picket width + gap))
Why the layout inputs are yours
Post spacing, rail count, gate framing, concrete quantity and fence details depend on the actual system, site and local requirements. This calculator estimates quantities from your chosen layout; it does not design the fence or certify code compliance.
Before ordering fence materials
Confirm the post spacing, gate widths, rail layout and infill product from your actual fence plan. Slopes, stepped sections and special corners may change the simple repeated-section count. Concrete bags are rounded as purchase units only when you enter a bags-per-post quantity from your installation plan.
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