Fence Calculator

• •Use the Fence Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

Building a fence requires careful planning to determine the number of posts, rails, and pickets. Post spacing depends on the fence style and wind load -- 6 to 8 feet is standard for most residential fences. Rails connect the posts horizontally, and pickets (or boards) are attached vertically to the rails. This calculator provides a material list based on your fence length, post spacing, and picket dimensions. Whether you are building a privacy fence, a picket fence, or a ranch-style fence, getting accurate counts ensures you make one trip to the lumber yard instead of three.

• !Forgetting the +1 for the end post (a 100 ft fence with 10 ft spacing needs 11 posts, not 10).
• !Not accounting for gate openings which require wider spacing and additional hardware.
• !Using untreated lumber for in-ground posts, leading to premature rot.
• !Setting posts too shallow in cold climates where frost heave is a concern.