Match the price field to the quantity
The calculator multiplies each result quantity by the rate entered for that component. The displayed dollar total contains these five cost terms:
| Price field | Quantity it prices | Rate basis |
|---|---|---|
| Post price | Posts result | One post |
| Rail price | Rails result | One rail |
| Picket / slat price | Wood infill count | One picket or slat |
| Concrete bag price | Calculated bag count | One bag |
| Fastener pack price | Whole packs from the fastener count | One 100-fastener cost unit |
Keep the unit beside each rate when copying it from a quote or supplier page. A total can be mathematically consistent with the rates entered while still being misleading if a bundle price is entered where the calculator expects an individual-item rate.
Convert a quoted bundle to a matching rate
If a quote lists one total for a bundle of identical posts, rails, pickets or bags, divide the bundle total by the number of items in that bundle to obtain a per-item rate. Enter that per-item amount in the corresponding field. This is a unit conversion for your supplied quote, not a price lookup.
For a fastener quote, convert the quoted amount to the calculator's 100-fastener cost unit. In symbols:
rate per 100 fasteners = quoted pack price ÷ fasteners in that pack × 100
The fastener quantity card remains a fastener count. Its cost term is ceil(fasteners ÷ 100) × entered pack price, so the entered rate must match that pack basis. The calculator does not ask for a different pack size or automatically convert a supplier's package.
Concrete has a separate quantity input
To calculate concrete bags, enter the concrete volume per post and the yield per bag from the product information you are using. The bag-price field is then multiplied by the resulting whole bag count. The tool does not supply a hole volume, bag yield or bag price for you.
What is outside these price fields
The current total has no separate terms for labor, tax, delivery, gate leaves, gate hardware or chain-link fabric. In chain-link mode the picket/slat quantity is zero, even though its price box is part of the form; that zero quantity contributes no picket cost. See why the chain-link price form asks for a picket rate for that branch-specific detail.
The result is an estimate from the quantities and rates you entered. It is not a supplier quote or a complete installed-project price. For the conditions that make the cost box appear, see why the cost estimate may be missing. For the per-foot denominator, see which run length the calculator uses.
Method and source
This guide follows the price labels in this site's calculator form and the total expression in its calculation code. It adds no product, supplier or market price data. The pack conversion is arithmetic for matching a quote's unit to the calculator's cost unit; the tool's quantities remain planning estimates for one straight run.