Calculators
Wire calculators
4 tools
Wire gauge, AWG/SWG, and voltage drop.
- AWG to mm Calculator Convert American Wire Gauge (AWG) to conductor diameter in mm and cross-section in mm² with standard AWG tables. Runs locally in your browser.
- SWG to mm Calculator Convert Standard Wire Gauge (SWG) to millimetres and mm² for British/imperial wire sizing. Runs locally in your browser. Free online tool — no sign-up.
- Voltage Drop Calculator Estimate DC or resistive single-phase / balanced three-phase voltage drop and conductor I²R loss from current, cable length, and Ω/km. Optional system voltage shows % drop and load voltage. Runs locally in your browser. Try it free.
- Wire Gauge Chart Look up AWG wire gauge charts for diameter, area, and typical ampacity reference values in one place. Runs locally in your browser. Try it free.