Tool · F-01
Fence post calculator
Posts, gravel, and concrete sized to your run. Frost-line aware — set your hole depth to local code and it does the rest.
Run length
ft
Post spacing
ft
Post size
Hole diameter
in
Hole depth
in
Gravel base
in
Concrete bag size
Waste factor10%
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Not sure how many bags per post?
Full bag math for 4×4, 6×6, and round metal posts — including hole sizing rules, frost-line depth by region, and fast-set vs standard concrete tradeoffs.
Full guide: How many bags of concrete for a fence post? →AdvertisementAd slot 3 · near footer · responsive · responsive