Fence Calculator
Estimate materials for a straight fence run. Enter the fence length, post spacing, picket or board width, gap and number of rails to get a starting quantity for posts, pickets and rails.
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How the fence calculator works
Estimate materials for a straight fence run. Enter the fence length, post spacing, picket or board width, gap and number of rails to get a starting quantity for posts, pickets and rails.
Posts ≈ fence length ÷ post spacing + 1. Pickets ≈ fence length ÷ (picket width + gap), rounded up. Rails = spaces between posts × rail count. The calculator is designed to give a useful first-pass material estimate while keeping the assumptions visible. For a purchase, compare the result with the product packaging or supplier quotation.
Common search terms for this tool include fence calculator, fence material calculator, fence post calculator, picket fence calculator. The wording is included naturally so the page answers the same questions people ask when planning a project.
Frequently asked questions
Does this handle corners and gates?
The base calculator is for a straight run. Add extra posts for corners, ends and gate structures separately.
How many fence posts do I need?
The starting estimate is the number of bays plus one end post. Local installation details can require more.
Why does picket width matter?
The board width and gap determine how many boards fit across the fence.
Can I calculate fence cost?
Yes. Enter optional prices per post, picket and rail.