Printable Ampacity Calculator Sheet
This one-page Letter landscape sheet is for electricians, installers, and anyone sizing wire for real runs. It includes columns for Circuit, Conductor, Table ampacity (A), Temp factor, Bundling factor, Corrected (A), Terminal limit (A), and Usable (A). Example entries include Attic run and 10 AWG Cu THHN with the factors already laid out for ampacity correction.
Free printable · PDF
- 1 page
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 104 KB
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Enter the table ampacity, temperature factor, and bundling factor for each circuit, then compare the corrected ampacity with the terminal limit. Use the Usable (A) column to record the final value for the run and keep sizing notes together on one page.
Good for
- Size conductors for attic runs
- Record ampacity corrections by circuit
- Check terminal limits against usable amps
Tip: Print in landscape at full size so the factor and amp columns stay easy to read.
5 files · PDF, XLSX, DOCX
Get every sheet: Wire Ampacity Charts & Calculator
This sheet plus 5 more in one download, with the editable Excel and Word files. Printable copper and aluminum ampacity chart, correction and bundling factor sheet, an Excel corrected-ampacity calculator, a voltage drop worksheet and a circuit schedule template.
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