Fence Material and Cost Calculator
Estimate fence sections, post types, gates, rails, pickets, concrete, fasteners, and installed cost.
How to use the fence calculator
- Measure the actual project. Break irregular work into separate sections and record finished dimensions consistently.
- Enter the core measurements. The quick view focuses on project geometry; add or subtract sections where the calculator supports multiple areas.
- Review purchasing assumptions. Open Advanced inputs to replace example prices, waste, coverage, density, pack size, minimum order, or delivery assumptions with current project information.
- Calculate and verify. Review the formula, limitations, whole-unit rounding, product instructions, and supplier requirements before purchasing.
Key inputs covered: Fence layout, Total fence length, Maximum post spacing, Number of gates, Average gate width, Corner posts, Rails per section, Picket width, Picket gap, Slope/cut allowance, and additional project-specific assumptions.
Result coverage: The fence calculator reports 9 separate quantities so the primary estimate and its supporting purchase or planning values can be checked together.
Estimate fence materials for multiple runs
Add fence runs and gates, then estimate posts, bays, rails, pickets or panels, concrete allowance, waste, and material cost from editable spacing and product inputs.
Post spacing and fence bays
Each run rounds up to whole bays so actual spacing does not exceed the entered maximum. End, corner, gate, and shared posts still require a real layout check.
Concrete for fence posts
For hole-by-hole concrete volume that deducts the embedded post, use the related fence-post concrete calculator.
How the estimate works
Remove gate widths, divide the remaining run by maximum spacing, then add end or gate posts and material allowances.
An open run needs one more boundary post than sections before gate posts are added.
Assumptions, rounding, and limitations
Dimensions are treated as finished measurements. Only deductions and allowances entered above are included. Decimal measurements display to two places; purchase quantities round up when a whole container or piece is required.
- Corner count is reported separately; verify the post schedule against the actual layout.
- Locate utilities and confirm property lines, permits, and local rules.
- Slope, gate construction, and post size can change the material list.
Sources and review
These references support unit conversions and selected planning assumptions. Product instructions and local requirements control the actual project.
Last reviewed: 2026-10-09
Editorial process
BuildPlanCalc publishes the formula, editable assumptions, limitations, and supporting references so the estimate can be checked rather than treated as a black box. See the calculation and review methodology, or report a correction.
Frequently asked questions
Are the results exact?
No. Results are planning estimates based on the dimensions and assumptions entered. Confirm product coverage, site conditions, and ordering rules with the supplier.
Why can the actual post spacing be less than my input?
The entered spacing is treated as a maximum. Each run rounds up to whole bays, which distributes posts without exceeding it.