VoltKit: Voltage Drop & Wire

Launch sale — Voltage drop, wire size and Ohm's law, 100% offline.

VoltKit is the fast, no-nonsense electrical calculator built for the field.

VOLTAGE DROP — Single-phase, three-phase and DC. AWG or mm², feet or meters, copper or aluminum. Instant pass/fail against the 3% / 5% guidelines, with the recommended minimum conductor size.

WIRE SIZE (Pro) — Enter load, distance and voltage. Get the minimum conductor that satisfies BOTH voltage drop and ampacity, with each constraint shown separately.

OHM'S LAW & POWER — Enter any two values, get the rest. Power factor supported for AC.

WHY ELECTRICIANS CHOOSE VOLTKIT • 100% offline — no account, no ads, no tracking, no permissions • Shows the math — every result includes the formula with your values plugged in • Built for the field — dark, glove-friendly, instant results as you type • One-time purchase — Pro is yours forever, no subscription

COMING IN FREE UPDATES FOR PRO USERS Ampacity with derating, conduit fill, box fill, motor calculations, EV charger circuit sizing.

Results are estimates for reference only. Always verify with the current edition of applicable codes and a licensed professional. National Electrical Code® and NEC® are registered trademarks of the National Fire Protection Association, which is not affiliated with this app.