Printable Voltage Drop Calculator Sheet
This one-page letter landscape sheet is for checking voltage drop on single-phase copper circuits. It includes a calculator layout with fields for one-way length in feet, current in amps, system voltage, and conductor resistance in ohms per 1000 feet from the chart. The table columns are Circuit, Length ft, Current A, Voltage, Ω/1000 ft, Voltage drop V, and Drop %. Sample rows include Kitchen 12 AWG, 100 ft, 20 A, 120 V, 1.588, and Water heater 10 AWG, 40 ft, 30 A, 240 V, 0.9989.
Free printable · PDF
- 2 pages
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 102 KB
Free for personal, family and classroom use.
Enter the circuit name, one-way length, current, system voltage, and the resistance value from the chart. Then use the worksheet to calculate voltage drop in volts and as a percentage for each run.
Good for
- Check voltage drop for branch circuits
- Compare wire sizes before installation
- Record circuit calculations in one place
Tip: Print at actual size so the table lines and number columns stay easy to read.
5 files · PDF, XLSX, DOCX
Get every sheet: AWG Wire Chart Pack
This sheet plus 4 more in one download, with the editable Excel and Word files. Printable AWG charts with diameter, area and resistance, a copper ampacity card, an AWG to mm² card, an Excel voltage-drop calculator and a circuit planning worksheet.
$5.00 USD, one-time 5 files · about $1.00 each
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Printable AWG Wire Size Chart
Printable AWG Ampacity Chart
Printable AWG to mm² Chart
Printable Circuit Planning Worksheet