N
Velvet Digest

How do you measure for fence posts?

Author

Mia Phillips

Updated on April 14, 2026

Verify that the fence layout is square.
  1. From an outside corner, measure 3 feet along one line, and make a mark on the string.
  2. Measure 4 feet along the other line, and make a mark on the string.
  3. Measure the diagonal distance between the two marks and adjust the stakes as needed so the distance is 5 feet.

.

Regarding this, how far should fence posts be?

Determine Spacing for Fence Posts Decide how far apart you'd like to set the fence posts. Typically, fence posts are spaced between six and eight feet apart. The corner posts are set first. To align all of the posts in between, stretch a line from each corner post to work as your guide.

One may also ask, how much concrete do I need for fence posts? Also 1-1/2 bags per hole is about right for a 4x4 fence post. Also remember, the depth of the post hole should be one-half of the above-ground post height. (Example: For a 6' above ground post, use a post with an overall height of 9 feet and place 3 feet in the ground).

Thereof, is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post's aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

How do you level a fence post on uneven ground?

Keep the picket tops level to build a fence over uneven ground.

  1. Mark your fence line with wood stakes and mason's twine.
  2. Dig the post holes 10 to 12 inches across and 24 inches deep.
  3. Attach two, 2x4 runners, one 3 inches above the ground and one 3 inches below the top of the posts, between the first two posts.
Related Question Answers

How do you backfill a fence post?

Use a mix of crushed gravel and soil to backfill the hole around your new post - compacting the soil every 4-6 inches as you go.
  1. Dig your hole to a depth appropriate for the height of the post.
  2. Place a pre-cast concrete biscuit (block).
  3. Place your post in the hole and backfill with dirt.

How do you install a fence post without concrete?

Procedure:
  1. Find a concrete surface and lightly tamp your digging iron against it.
  2. Remove the turf and topsoil from the site of the post.
  3. Dig the hole putting the displaced earth onto the tarp.
  4. Pour 4 inches of gravel into the hole.
  5. Place the post in the hole.
  6. Add another 2 inches of gravel around the base of the post.

How do you dig a post hole?

To dig post holes with post hole diggers, start by holding one handle in each hand with the handles close together. Then, thrust the blades into the ground where you want to dig your first hole. Once the blades are in the ground, spread the handles apart so the jaws of your post hole diggers close around the dirt.

How do I keep my fence posts from rotting?

Brush the waterborne copper naphthenate wood preservative onto the top of the fence posts where the fresh cut reveals exposed, untreated wood. Apply additional coats after the first coat absorbs into the wood. Brush copper naphthenate wood preservative into any cracks that develop anywhere on the fence post.

Can fence posts be 10 feet apart?

Typical spacing is right around 8 feet between each post however different circumstances may call for different measurements and it is not uncommon to have spacing between posts reach up to 10 feet. Once you have a rough idea of your post layout start by digging your first hole.

Do you need to cement fence posts?

Concrete is the most secure material for setting fence posts, especially if you have sandy soil. Gravel may be okay with dense, clay-heavy soil, but in looser soil, concrete is the only thing that will truly keep your fence posts stuck in place.

How do you level and plumb a fence post?

Set the fence posts in the holes. Use a two sided post level to make sure each post is plumb. Pull a string from the top of the corner posts to make sure all the posts are the correct height and the fence is level. Pour concrete in the hole around each post and allow it to set to secure the posts in place.

How do you measure the height of a fence?

When a fence is constructed on top of or within 1 foot of the face of an above-ground retaining wall greater than 2 feet in height, and located in a required yard, the height of the fence shall be measured from the top of the fence to the midpoint height of the retaining wall, excluding the uppermost 2 feet of the

What size t post do I need?

Once you have the corners set and braced, run a guide line between them to ensure you set your T-posts in a straight line. You should space your posts 8-12 feet apart as a general rule, although 10-12 feet apart is sufficient for 5-6 wire barbed fence.

What size t post do I need for a 4 ft fence?

To determine the proper length, add together the depth of setting, which should be no less than 3-1/2 feet in the ground, plus the height of the top wire above the ground, plus 6” extra. For example, a corner brace post set 3-1/2' for a 4' fence would have to be 8' long.

How do you layout a curved fence?

Building a curved fence involves the proper placement of the posts to create the proper fence line.
  1. Mark out the curve of the fence.
  2. Select one end of the arc or curve and place a stake at this point.
  3. Measure from this stake to the next planned location along the curve.
  4. Dig fence post holes at each marked location.

What is a post level?

Post Level. A post level is, simply put, a spirit level that finds both level and plumb in a post or other type of 2x4. It has a simple, easy to use design: two-sided molded plastic forming a 90° angle, a height of 5.5 inches and 3.5 inch width on each side, and three spirit level vials.

How do you measure a post?

Step 1 - Measure the circumference of the post (distance around the post). Step 2 - Take that measurement and divide it by pi (3.14) to determine the post diameter. Step 3 - Figure your gate frame diameter using the same method.

How do you keep fence posts from rotting in concrete?

The ideal solution is to eliminate contact between soil and wood. Using a metal post anchor set in concrete is probably the most effective method for achieving maximum longevity. To help keep the post from wicking water, choose an anchor that spaces the post bottom away from the concrete.

Should you put gravel under fence post?

Gravel is best for fencing in heavier (more clayey) soils, and won't work well if you have loose, sandy soil. Gravel also allows water drainage around the fence posts, making the posts less susceptible to frost heaves. When setting fence posts in gravel, you should bury at least one-third of the fence post.

Can you build a fence without sinking posts?

If you need a temporary fence or a border that you can move as needed, a quick way is to use concrete blocks. Attach a bracket to a concrete block that is heavy enough to hold the wood or other material you plan to use to build the fence. The posts can be mounted to the brackets and the fence finished from there.

How long do pressure treated fence posts last?

Most treatment companies claim that when treated, most lumber will last more than 20 years. This holds true for pine and spruce, while cedar may last up to 40 years.

How do you install a 4x4 fence post?

Method 1 Setting the Post in Soil or Gravel
  1. Try this method if you have dense soil.
  2. Choose a durable fence post.
  3. Prep the wood against moisture (optional).
  4. Dig the hole.
  5. Drop gravel into the hole.
  6. Position the post in the hole.
  7. Fill the hole with tamped crushed stone or soil.
  8. Finish with a small hillock.

How deep should fence posts be?

Dig post hole so diameter of the hole is 3 times the width of the post (i.e., the hole for a 4” wood post should be about 12 inches wide). The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).