Printable Voltage Drop Calculator
This calculator is for electricians, contractors, and anyone sizing a circuit and checking voltage loss. It includes a simple table with columns for Circuit, Phases, Volts, Amps, Length ft, Material, Circular mils, Volts dropped, and % drop. Sample rows include Workshop feed and Pump, with fields set up for copper or aluminum conductors and 75 °C voltage drop results.
Free printable · PDF
- 2 pages
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 102 KB
Free for personal, family and classroom use.
Need to edit it? The full pack has the editable Excel and Word files plus all 4 sheets — $3.00, one-time.
Your free PDF is downloading. Want all 4 sheets in one download, plus the editable Excel and Word files so you can change the text?
Instant download · 7-day refund · Secure checkout by Stripe
Enter the circuit details, then use the filled formulas in columns H and I to see volts dropped and percent drop. Change the phases, voltage, current, one-way length, material, and circular mils for each row, then print the sheet for jobsite checks or keep it beside sizing notes.
Good for
- Check voltage drop for feeder and branch circuits
- Compare copper and aluminum conductor runs
- Record circuit calculations for field work
Tip: Print landscape and keep the sheet with your conduit and load notes for quick reference.
4 files · XLSX, PDF, DOCX
Get every sheet: Voltage Drop Toolkit
This sheet plus 3 more in one download, with the editable Excel and Word files. Excel voltage drop calculator for single- and three-phase runs, AWG and mm² resistance tables, maximum-length tables for 120 V and 240 V at 3%, and a wire run planning log.
$3.00 USD, one-time 4 files · about $0.75 each
- Instant download
- 7-day refund
- Secure checkout by Stripe
7-day money-back guarantee. Full refund within 7 days of purchase, even after you download.
More free printables
Printable Resistance Tables Sheet2 pages · free PDF
Printable Voltage Drop Max Length TableMax length table for 3% voltage drop on single-phase copper conductors at 75 °C, with current and wire size columns for common 120 V and 240 V runs.1 page · free PDF
Printable Voltage Drop Planning LogTrack circuit load, voltage, wire length, size chosen, voltage drop, and ampacity checks on one landscape planning log for wiring runs.1 page · free PDF