Measure first
Measure finished dimensions, actual stock, openings, and site constraints before ordering material.
Fence planning
Fence Calculator: posts, pickets, rails, concrete, and cost
Plan a straight wood fence with a practical shopping list. Enter the fence length, height, post spacing, picket size, and gate count to estimate the core materials before you order.
How the estimate works
Use the number as a planning starting point.
Post count is based on fence length divided by chosen spacing, with an end post included. Pickets are based on usable picket width plus the gap; rails are based on fence sections.
Check the result
Fence layouts change at corners, slopes, and gates, so treat this as a material estimate. Add corner, end, and gate posts to the final count after marking the site.
Plan the next step
Use the related calculators below to turn a first estimate into a material list, layout, or a more detailed project plan.
FAQ
Common Fence Calculator questions
How many fence posts do I need?
Divide the straight fence length by the target post spacing, round up, then include both end posts. Add posts for every corner, change of direction, and gate.
Does this fence calculator include waste?
Yes. The waste allowance increases pickets, rails, and concrete estimates so you can plan for cuts, defects, and field adjustments.
Related tools
Keep the project moving.
Post Hole Concrete Calculator
Free post hole concrete calculator. Estimate concrete volume and 40, 50, 60, or 80 lb bags for fence, deck, pergola, and mailbox posts.
Open Post Hole Concrete CalculatorPicket Spacing Calculator
Free picket spacing calculator. Find fence picket quantity, equal gaps, and layout marks from fence length, picket width, and target gap.
Open Picket Spacing CalculatorFence Stain Calculator
Free fence stain calculator. Estimate stain gallons and material cost for a wood fence from length, height, sides, coats, and coverage.
Open Fence Stain CalculatorDeck Cost & Material Calculator
Free deck cost and material calculator. Estimate decking boards, joists, fasteners, waste allowance, and a starting material budget.
Open Deck Cost & Material CalculatorPlanning disclaimer: WoodCutTool results are estimates. Verify measurements, product instructions, material condition, local requirements, and safety practices before buying, cutting, or building.