Wire Size & Voltage Drop Calc

Wire Size & Voltage Drop Calc is a fast, offline reference tool for electricians, apprentices, and serious DIY users. It shows the formula and the code reference behind every result — no black box. WHAT IT DOES - AWG ↔ mm² converter — switch between American (AWG) and metric (mm²) wire sizes instantly. - Voltage drop calculator — single phase, split-phase (240V residential) and three phase. See %VD, voltage at the load, and a clear recommendation if drop is too high. - Copper wire size reference chart — quick at-a-glance sizing. - Ampacity reference table — based on NEC Table 310.16 (copper, 60/75/90°C). Clean and screenshot-friendly for the job site. WHY IT'S DIFFERENT - The formula is shown on every result — you see the math, not just a number. - The source/table reference is cited so you can verify it. - Works fully offline. No account, no sign-up. - Copy or share any result — the reference disclaimer is included automatically. IMPORTANT — REFERENCE ONLY This app is a reference calculator. It is not a substitute for a licensed electrician, electrical engineer, your local electrical code, or the Authority Having Jurisdiction (AHJ). Incorrect wire sizing can cause fire, equipment damage, or injury. Always verify calculations against current local code and consult a qualified professional before any installation. Built by HeloStudios. Feedback is welcome. It helps us improve.