Separate runs need separate rounding
Two short runs can need more panels than one run of their combined length. Count each isolated line first, then add the totals.
A fence shopping estimate
Turn each straight run into full panel bays and a simple post count. See the extra span from rounding, add spare panels and compare your quoted costs.
Round each run on its own; spare panels are added only to the shopping total.
| Run | Desired | Panels | Posts | Full-bay span | Above desired |
|---|
Two short runs can need more panels than one run of their combined length. Count each isolated line first, then add the totals.
One independent run has a boundary at each end, plus boundaries between panels: its panel count plus one. Shared corners need a separate check.
Your effective bay width drives the calculation. Real end-post widths, gaps, fitting details and panel cuts can change the finished span.