Start with the intended fence line
Walk the intended route and decide where the fence should run before measuring lengths. A material calculator does not establish a legal property boundary. If the boundary is uncertain, check suitable survey or local property information before laying out the project.
Mark ends, corners and gates first
Sketch the path and mark every start and end, each change in direction, every gate opening, and any major terrain or layout break. These points affect where sections meet and where posts or panel ends need to be considered. Keep each gate distinct from the fence-filled runs.
Measure each straight run separately
For the Fence Calculator, a run is one straight solid fence section between ends, corners or gate openings. Record each run on its own line. Do not combine all sides into one perimeter before rounding the section or panel count; short sides and corners can change the total.
When a run reaches a gate, stop the solid run at one edge of the opening and begin a new run at the other edge. The opening itself is entered separately. The calculator's topology formulas assume that the runs and gates form one contiguous fence path.
Measure gate openings separately
Record the clear width between the planned gate edges and leave that width out of picket- or panel-filled runs. A single or double gate is one opening in the count unless it is entered as two separate openings. Gate hardware, hinge and latch posts, and structural details vary; this quantity calculator does not engineer the gate.
Record actual material dimensions
Write down the dimensions that affect the selected product and installed layout: actual picket or board width, clear board gap, actual installed panel width, available rail stock length and the post spacing specified for the chosen system. Nominal sizes may not match actual dimensions once brackets or installation details are considered.
If estimating concrete, also record the planned hole diameter and depth, actual post cross-section, embedded depth, and the bag yield printed on the product. Bag weight alone is not its finished volume yield. Confirm the dimensions and instructions with the current product information or supplier.
Note slopes and obstacles
Slopes, steps, trees, paving, retaining walls and uneven ground may change the practical layout. This calculator does not model terrain, stepped or racked panels, unusual returns or obstacle offsets. Keep those decisions in the sketch and ask the product supplier or installer how they affect the final takeoff.
Worked measurement example
Suppose the planned fence has a 48 ft straight run, a 4 ft gate opening, and another 48 ft straight run. The full line span is 48 + 4 + 48 = 100 ft.
- Run 1: 48 ft
- Gate opening: 4 ft
- Run 2: 48 ft
Enter the two 48 ft solid lengths as separate runs and the 4 ft opening as a gate. This keeps the gate out of the board or panel run lengths and leaves each side's section rounding visible.
Before digging
In the United States, contact the official 811 Call Before You Dig service before excavation so underground utilities can be located. The notice process and timing vary by location, so follow the instructions for the local service. Outside the U.S., use the equivalent local utility-locating service.
Turn the measurements into a material estimate
Enter the measured runs, gates, layout and product assumptions in the Fence Calculator. It can estimate sections, posts, rails, pickets or panels, optional post-hole concrete and costs from prices you enter.
For hole-volume and bag-yield details, read How to Estimate Concrete for Fence Post Holes or use the Concrete Calculator. Hole dimensions remain project assumptions, not universal recommendations.
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