What size post for 6ft, 4ft, 5ft, 3ft and 8ft fence | what size post do i need for 4 foot high fence | what size post do i need for 5 foot high fence | what size post do i need for 6 foot high fence | what size post do i need for 8 foot high fence.

Fence posts are built up surrounding the property area of land, it is made of iron steel rod or Timber, in those areas wooden Timber is not inexpensive, mostly agriculture land is surrounded by wooden Timber post, this is made for protection of agricultural land, farm house and their property, and some due to privacy reasons.

Fence post are in round, square or rectangular shape made of steel, concrete pole or wooden Timber, but most commonly used is wooden timber fence post.

**Size of fence posts**:- commonly used size of fence post made of wooden Timber are in square shape of cross sectional dimension of 3″×3″, 4″×4″, 5″×5″ and 6″×6″ having total length about 8 feet, out of 8 feet post length minimum 2 feet buried into the ground and about 6 feet height above the ground level.

**Size of fence post hole**:- for fencing post you should dig out the soil from the ground and make a post hole, regarding this, what is the size of post hole?, it’s totally depends on height of fence post above the ground and cross-sectional dimension of fence post, depth of post hole should be 1/3 to 1/2 of fence post height which is exactly above the ground and width of post hole should be 3 times the diameter or width of fence of post.

For example a fence post is 6 feet in height above the ground and their cross sectional dimension is 4″×4″, minimum depth of post hole is 1/3 of 6 ft is equal as 2 feet must be buried into the ground and maximum should be 1/2 of 6 ft is equal as 3 feet and width of post hole is 3 times of 4″, that should be equal as 12″ or 1 feet.

**Thumb rule for size of post hole**:–

● Depth of post hole – 1/3 to 1/2 of height of fence post above ground

● Width of post hole – 3 times diameter or width of cross section of fence post.

Length of fence post depending on your kinds of requirement and protection, either it will be used for privacy purpose, or for protecting agricultural land and property, generally fence post used for privacy purpose is around 6 to 8 feet in height above the ground and for agriculture purpose it should be 4 to 6 feet height.

In this article you know about what size post for 4ft, 5ft, 6ft and 8ft fence that will help you in better sizing and choosing right size of post for your required height of fence.

**What size post for 6ft, 5ft, 3ft and 8ft fence**

If you’re setting wooden post, you’ll need 8ft (2.4m) posts for a 6ft (1.828m) fence such as. your posts are 2ft (0.6m) longer than the fence height. Use 6in × 6in post for 8 feet high fences, 4in x 4in or 5in × 5inposts for fences of 5ft to 6ft and 3in x 3in posts for anything under 5ft such as for 3ft to 4ft. The size and squareness of the post will increase stability and make it easy for you to fasten rails and pickets on each post.

**What size post for 3ft fence**:- for a 3 foot high fence you will need atleast 3in × 3in (3-inch by 3-inch) square post. This is the best post size for a 3-foot fence. A fence post of 3 feet height of 3″×3″ cross section have depth of post hole is about 1 feet (1/3×3=1 ft) and width of hole is 9″ deep (3 ×3″=9″). In terms of height, 3in × 3in post should be 4 feet long for 3ft fence. The extra length is for the ground hole where each post will be buried.

**What size post for 4ft fence:**– for a 4 foot high fence you will need atleast 3in × 3in (3-inch by 3-inch) square post. This is the best post size for a 4-foot fence. A fence post of 4 feet height of 3″×3″ cross section have depth of post hole is about 1.25′ (16″) and width of hole is 9″ deep. In terms of height, 3in × 3in post should be 5.25 feet long for 4ft fence. The extra length is for the ground hole where each post will be buried.

**What size post for 5ft fence**:- for a 5 foot high fence you will need atleast 4in × 4in (4-inch by 4-inch) square post. This is the best post size for a 5-foot fence. A fence post of 5 feet height of 4″×4″ cross section have depth of post hole is about 1.66′ (20″) and width of hole is 12″ deep. In terms of height, 4in × 4in post should be 6.66 feet (6 feet and 8 inch) long for 5ft fence. The extra length is for the ground hole where each post will be buried.

**What size post for 6ft fence**:- for a 6 foot high fence you will need 4in × 4in (4-inch by 4-inch) or 5in × 5in (5-inch by 5-inch) square post. This is the best post size for a 6-foot fence. A fence post of 6 feet height of 4″×4″ cross section have depth of post hole is about 2′ (24″) and width of hole is 12″ deep. In terms of height, 4in × 4in post should be 8 feet long for 6ft fence. The extra length is for the ground hole where each post will be buried.

**What size post for 8ft fence**:- for a 8 foot high fence you will need 6in × 6in (6-inch by 6-inch) or 5in × 5in (5-inch by 5-inch) square post. This is the best post size for a 8-foot fence. A fence post of 8 feet height of 5″×5″ cross section have depth of post hole is about 2.66′ (32″) and width of hole is 18″ deep. In terms of height, 6in × 6in post should be 10.66 feet long for 8ft fence. The extra length is for the ground hole where each post will be buried.

**How deep should posts be for a 3 foot fence**:- the general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 of the actual above-ground height of the post. So, a 3 foot high finished post ideally needs to be buried 1 feet deep into the ground and minimum of 9 inches wide.

**How deep should posts be for a 4 foot fence**:- the general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 of the actual above-ground height of the post. So, a 4 foot high finished post ideally needs to be buried 1.33 feet (16″) deep into the ground and minimum of 12 inches wide.

**How deep should posts be for a 5 foot fence:**– the general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 of the actual above-ground height of the post. So, a 5 foot high finished post ideally needs to be buried 1.66 feet (20″) deep into the ground and minimum of 12 inches wide.

**How deep should posts be for a 6 foot fence**:- the general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 of the actual above-ground height of the post. So, a 6 foot high finished post ideally needs to be buried 2 feet (24″) deep into the ground and minimum of 12 inches wide.

**Conclusion**:-

For a 5ft to 6 foot high fence you will need atleast 4in × 4in square post, for a 8 foot fence – 6in × 6in post size & for 3ft to 4ft high fence 3in × 3in size of square post will be required. This is the best post size for fence.