How quantities are counted
sections = fence length ÷ maximum spacingpickets = run length ÷ (picket width + gap)Sections and pickets round up. A single straight run uses one more post than its number of sections.
Fence calculator
Turn a straight fence run into an order estimate for sections, posts, rails, pickets, and post concrete.
Enter the fence layout
Calculate separate runs around corners and gates, then combine the quantities.
Mark the actual run first
Slopes, corners, gates, property lines, utilities, wind exposure, frost depth, and local rules affect the finished design. Confirm locations and required permits before digging.
Worked example
An 80 ft straight fence with posts at 8 ft maximum
Sections and posts80 ÷ 8 = 10 sections, requiring 11 line/end posts
Rails10 sections × 2 rails = 20 rails
Pickets960 in ÷ (5.5 + 0.5) = 160 pickets before waste
With 10% waste176 pickets; at 2 bags per post, 22 concrete bags
Count gates, corners, and separate runs explicitly
The straight-run result assumes one uninterrupted line. Stop each run at a corner or gate, calculate its length, and then reconcile shared posts so they are counted once. Gate posts may need different sizes, footings, hardware, and bracing. A sloped fence may also use stepped or racked sections that change post and picket quantities.