Fastener calculator
Enter the panel size and the edge and field spacing. This counts the fasteners the pattern actually uses, and the boxes to buy, with true-size pitch gauges below.
Around the perimeter
0 for edge only
Advanced settings100 fasteners per box
You need
80fasteners
Boxes to buy
1
Per panel
80
Edge / field
48 / 32
Per panel
- Around the edgeEvery 6" from corner to corner
- 48
- In the fieldSpread evenly at about 12"
- 32
- 1 panel1 box of 100
- 80
Where to buy this
- 1 box — 80 fastenersHome DepotLowe'sAmazon
Plain search links, nothing sponsored. Prices and stock are the shop's, and a local lumberyard will usually beat both on solid stock.
Pitch gauges, at true size
Not the whole sheet — both patterns repeat, so a spacer beats measuring every mark by hand. Print at 100%, check the ruler, then cut a scrap to whichever length you're using.
Put a tape on the printed ruler. If it does not read exactly 6 inches, the print was scaled — set the print dialog to 100% or “Actual size” and print it again. Do not cut wood from a template that failed this.
Cut a scrap to this length and use it as a spacer between fasteners.
Cut a scrap to this length and use it as a spacer between fasteners.
Printing this properly
In the print dialog, set the scale to 100% or “Actual size” and turn off “Fit to page”. Measure the printed ruler with a tape before you trust the spacing.
Worked example: a 48" × 96" sheet
One 48" × 96" sheet fastened every 6" around the edge and every 12" in the field takes 48 fasteners on the edges and 32 in the field.
That is 80 in all: 1 box of 100.
- Fasteners
- 80
- Boxes
- 1
- Edge / field, per panel
- 48 / 32
These are the figures the calculator above opens on. Change any field and it works the same problem for your numbers.
About fastener patterns
- Why does the field spacing matter if the perimeter is nailed tighter?
- The edges are where a panel lifts, squeaks or telegraphs a ridge through flooring, because an unsupported edge can flex independently of its neighbour. The field just has to hold the middle down, so it can be spaced wider — 12" on centre is the common default for 6" edges, and both numbers are the ones printed on a box of subfloor nails or a sheathing schedule.
- What spacing should I actually use?
- 6" at the edges and 12" in the field is the common default for roof and floor sheathing; check the panel manufacturer's schedule or your local code for your actual assembly, since wind and seismic zones tighten both numbers. This calculator counts whatever spacing you give it — it does not know your code, only the arithmetic.
- Does this include waste for bent or missed fasteners?
- No — it is the exact count the pattern draws. Buy a box more than the number of boxes shown, especially with a framing nailer, because a jammed or bent nail on a sheet you can't easily back out of is normal, not a mistake.
- My field spacing doesn't divide evenly into the panel. What happens?
- The field count is spread evenly across the space between the edge rows rather than run at a fixed pitch with a gap left over at one end — the same reasoning a baluster layout uses. So the field spacing shown in the drawing is close to what you asked for, not necessarily exact to the sixteenth.
You might also need
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- Deck and fence takeoffBoards, joists, posts, pickets, screws and bags of concrete, with the gaps between boards properly counted.
- Pilot hole calculatorThe right drill bit for a wood screw, by gauge number and by softwood or hardwood.
- Sheathing4x8 sheets of plywood or OSB for wall sheathing, a roof from its footprint and pitch, or a subfloor, with the H-clips for the roof.