Define the line that the measurement follows
A fence measurement needs a consistent reference. The fence calculator uses the centres of the end posts. A gate opening uses the clear space between the inner faces of its posts. Mixing a clear opening with a centre-to-centre run can shift both bay widths and material counts.
Sketch every run and mark where it turns. Connected runs share their corner post; independent lines have separate ends. A closed outline has different end conditions again. Choose the layout type that describes the physical fence rather than adding a blanket number of posts later.
Place gates before dividing bays
A gate breaks a run into uninterrupted intervals. Each interval is divided into equal bays no longer than the selected centre spacing. Moving a gate can therefore change the number of bays even when the total fence length stays the same.
Gate-duty posts are part of the installed post count. Their separate price replaces the ordinary post price for those positions. It should not be interpreted as a second post in the same hole.
Match the infill method to the product
Vertical boards between posts and complete panel kits have different counting rules. Enter a panel module from the product instructions. If cutting is disallowed, an interval must fit complete modules. If cutting is allowed, a shorter bay is identified, but fittings and required cutting allowances still need a separate check.
For boards, the model allows symmetric edge trimming and a chosen gap. It does not represent horizontal boards, overlapping faces or a staggered double-sided arrangement.
Treat concrete as a separate quantity
Enter the actual filled depth, not the total excavation depth if a gravel layer or unfilled top remains. The calculator subtracts a solid post section from a cylindrical fill. Hollow posts or different gate foundations need separate estimates.
Use the product’s mixed volume per bag. Bag mass alone cannot provide that volume. The concrete calculator can help with other separate concrete elements.