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Board-on-Board Fence Board Calculator — result sheet
Estimate overlapping fence board count and covered area from fence length, board width, overlap, height, and waste allowance.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Effective coverage = board width − overlap; boards = ceil(fence length/effective coverage × (1+waste)); face area = length × height.
The estimate models one visible board layer with a constant overlap and keeps the waste allowance explicit.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Fence length — m; minimum 1.0E-6; maximum 1000000
- Fence height — m; minimum 1.0E-6; maximum 1000000
- Board width — m; minimum 1.0E-6; maximum 1000000
- Board overlap — m; minimum 0; maximum 1000000
- Waste allowance — %; minimum 0; maximum 1000
Worked example
| Input | Value |
|---|---|
| Fence length | 20 |
| Fence height | 1.8 |
| Board width | 0.15 |
| Board overlap | 0.03 |
| Waste allowance | 10 |
Boards = 184; visible face area = 36 m².
Assumptions and limits
- Dimensions use metres and overlap is less than board width.
- Every board spans the fence height and the pattern is straight.
- Posts, rails, gates, caps, fasteners, terrain, wind loads, and local requirements are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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