How do you calculate fence post spacing?

Divide the fence run by the maximum spacing you want to allow, then round up to a whole number of bays. Add one post for a straight run with posts at both ends. The exact spacing is the run length divided by the number of bays.

How far apart should fence posts be?

Many wood privacy fences use about 6 to 8 feet between posts. Garden and livestock fences may use wider spacing depending on wire, bracing, terrain, animal pressure, wind, and local conditions. Always check the fence system and local requirements before building.

Should fence post spacing be measured center to center?

Yes. Layout is usually easiest from post center to post center. Mark the start post center, mark the end post center, then divide the distance between those centers into equal bays.

Fence calculator

Fence Post Spacing Calculator

Plan an even fence layout before you dig. Enter the fence run and maximum spacing to get post count, exact center-to-center spacing, post positions, rail length, concrete bags, and a rough material cost.

Posts needed 14 posts Exact spacing: 7 ft 8 in across a 100 ft run.

Fence layout

Fence run length (feet) Measure the straight run from first post center to last post center. Maximum post spacing (feet) Common targets are 6 ft for sturdy wood fencing and 8 ft for many panel layouts. Layout type

Materials

Rails per section Gate openings Adds two sturdy gate posts per opening to the shopping list. Extra material allowance (%)

Concrete and budget

Hole diameter (inches) Hole depth (inches) Concrete bag size (lb) Price per post ($) Price per rail ($) Price per concrete bag ($)

Use this as a planning estimate. Corner bracing, terminal posts, soil, frost depth, slope, wind exposure, and your fence product can change the final material list.

How to use this fence post spacing calculator

Enter the straight fence run, then choose the widest spacing you are comfortable using. The calculator rounds up to enough bays so no section is longer than your maximum, then gives you the exact equal spacing for clean marks along the string line.

For a typical straight privacy fence, keep “posts at both ends” selected. For a rectangular paddock where the final post meets the starting corner again, use the closed-loop option. Add gate openings when you want them counted in the shopping list.

Common fence post spacing examples

100 ft fence with 8 ft max spacing: 14 posts create 13 equal bays at about 7 ft 8 in.
48 ft garden fence with 6 ft max spacing: 9 posts create 8 equal bays at 6 ft apart.
330 ft paddock loop with 10 ft max spacing: 33 line positions create 33 bays at 10 ft apart around the loop.

FAQ

Is 8 feet too far between fence posts?

Eight feet is common for many wood fence layouts, especially where rails or panels are sold in 8-foot lengths. Heavy gates, tall privacy fences, soft soil, high wind, and livestock pressure may call for closer spacing or stronger posts.

Can I use this for livestock or garden fencing?

Yes. Enter the run length and the maximum spacing you want for that fence type. Wire livestock fences may use wider spacing than wood privacy fences, but brace posts, corners, terrain, and animal pressure matter.

Does this calculate gate post spacing?

The gate field adds two gate posts per opening to the material count. For exact gate layout, mark the gate opening first, then calculate the fence runs on each side separately for the cleanest spacing.