## How deep should an 8 foot post be in the ground?

In general, holes should be at least 3 feet deep for posts that extend 8 feet or more above ground level. Posts that extend 6 feet above ground level should have holes at least 2 1/2 feet deep.

**How big of a hole do you need for a 4×4 post?**

12 inches

The diameter of your post hole should be three times the diameter of your post. So, if you’re planning on using a four-inch round or 4×4-inch square post, your post hole will need to be 12 inches in diameter. For a six-foot-high fence post, we would need a hole that’s 36 inches deep and 12 inches in diameter.

### Is 1 foot deep enough for fence post?

Determining Post Length You should always bury one-third of your fence post underground. This means that unless you are building a 2-foot fence, which is unlikely in any garden, a 1-foot hole will not be deep enough to support your post. For main and gateposts, you should dig the holes an additional 6 inches deep.

**How deep should a 6×6 deck post be?**

The depth of your hole should be about 1/4 of your post. For a 6×6 pole, the holes should be approximately 12 inches in diameter. As a general rule, the insertion hole width should never be less than 10 inches.

## How deep do post holes need to 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).

**How many bags of concrete do I need for a 4×4 post?**

Most fence post holes will need between 1 – 4 bags of concrete to securely hold the post in place. The best way to determine the size of the hole is: Diameter of the hole is 3 times the width of the fence post.

### Is 2 ft deep enough for fence post?

The minimum depth that a post hole should be for a panel section is two feet. A general rule used when building a fence is to dig the holes ⅓ to ½ of the post’s aboveground height. The more of the post that is underground, the more sturdy and durable the fence will be once completed.

**How deep should post hole be for deck?**

Dig the holes six inches deeper than the required frost line depth for your area, and slightly wider than the concrete footer tubes you’ll be using. A power auger can make this step easier and faster.

## How deep does a post hole need to be?

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).

**How deep should I bury a 20 foot post?**

The general rule of thumb when setting a post is that the depth of the post’s hole needs to be one-third to one-half of the actual above-ground height of the post.