How Much Fence for a 100 ft Yard Run?
A 100 ft straight run with one 4 ft gate is the standard backyard privacy fence job โ and the most searched fence project online. With 8 ft post spacing you need 13 line posts plus 2 gate posts, pickets for 96 net feet, two rails per section, gate hardware, and one 80 lb bag of concrete per hole. Here is the full takeoff plus layout tips that save a return trip.
Step-by-Step Takeoff
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1
Call 811 and pull a string line: mark the 100 ft run and the 4 ft gate opening first.
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2
Net picket run: 100 โ 4 ft gate = 96 ft.
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Posts: 96 รท 8 + 1 = 13, plus 2 gate posts = 15 posts.
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Pickets: 96 ft ร 12 รท (5.5 + 0.5 in gap) โ 192 pickets for 6-inch boards.
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Rails: 2 per 8 ft section ร 12 sections = 24 rails, plus gate frame lumber and hinges/latch kit.
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Concrete: 15 holes ร 2.5 bags per 1.5 cu ft hole (0.6 cu ft per 80 lb bag) = about 38 bags.
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7
Set posts plumb, crown rails up, stain or seal within 3 months. Price it all in the Fence Calculator and export the materials list.
Guide FAQ
How deep should fence posts go?
Below the local frost line โ 30 to 36 inches in most northern zones, 24 inches minimum elsewhere.
Wood or vinyl for a 100 ft run?
Wood costs roughly half up front; vinyl wins on lifetime maintenance. Compare both in the calculator.
How many pickets per 8 ft section?
Sixteen 5.5-inch pickets with a half-inch gap cover exactly 8 ft โ 192 for the full 96 ft run.
How much concrete per fence post hole?
About 2.5 eighty-pound bags for a 10-inch diameter hole 30 inches deep.
Do I need a permit for a backyard fence?
Often yes above 6 ft or in front yards โ check the city permit desk before you dig.
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