Wood Fence Calculator

Enter the length and height of a wood fence to get the posts, rails, pickets and concrete it needs, with the post spacing and picket gap you choose.

Read the guide: How Many Pickets for a 100 Foot Fence?

Wood fence

Pickets needed

209

14 posts · 39 rails · 42 bags of concrete

Posts
14
Rails
39
Pickets
209
Concrete (80 lb bags)
42

13 sections of 8 ft, each post set 2 ft deep. Buy 9 ft posts.

Draw this fence

A planning estimate, not a contractor takeoff. Add a little waste and confirm against local building code.

How it works

  1. 1

    Enter length and height

    Add the total run length and the fence height. Switch between feet and metres any time.

  2. 2

    Tune the build

    Set the post spacing, picket width and gap, and add any gates.

  3. 3

    Read the materials

    See posts, rails, pickets and concrete bags, ready to take to the yard.

Instant & 100% private — nothing is uploaded

Every calculation runs locally in your browser. The income, balances and goals you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.

Frequently asked questions

How many rails does a wood fence need?
Two rails suit a fence up to 4 ft, three rails are standard at 6 ft, and four rails are used above that. The calculator picks the count from your height, and you see it in the section breakdown.
How are the pickets counted?
It divides the fenced length by the picket width plus the gap. A privacy fence uses a tiny gap; a spaced picket fence uses a wider one, set both and the count updates.
Does it include the concrete?
Yes. It sizes each post hole from the post width and depth and totals the bags of concrete for the whole fence.
Are these numbers exact?
They are close planning estimates, not a substitute for a contractor takeoff. Real quantities depend on your terrain, post spacing, waste and local building code, so buy a little extra and confirm against your supplier.
Is my fence design sent anywhere?
No. Everything runs in your browser. The layout, lengths and prices you enter stay on your device, nothing is uploaded, logged or stored, and it all clears when you close the tab.