Finish Nail Calculator

Calculate finish nails for a trim installation.

Finish Nails
— nails
For the whole run.

Usage Tip

Drive one nail near each edge of wide trim so it cannot cup; set and fill the heads before painting.

THE MATH
points = round up( linear feet × 12 ÷ spacing )
nails = points × nails per point
Trim is nailed at regular points along its length, often into the studs behind it. Total nails depend on the run, the spacing, and how many nails go in at each point.
Enter the linear feet of trim, the nail spacing in inches (16 hits the studs), and nails per point (2 is common).
The result rounds up to whole points.
Scroll to Top

The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.