Construction
Fence Calculator
Building a wood privacy fence? Plug in length, pick spacing, and we'll work out posts, pickets, rails, and concrete bags.
FAQ
How deep should posts be? +
⅓ of total post length, minimum below frost line. A 6-ft fence usually uses 8-ft 4×4s buried 2.5-3 ft deep.
How much concrete per post? +
Two 50-lb bags for a typical 4×4 in a 10" wide × 30" deep hole. Add water; tamp in lifts.
Heads up: ClutchCalcs gives you fast, accurate results — but always sanity-check critical decisions (medical, financial, structural) with a professional.
Spot a wrong number or want a calculator added? Tell us →