Browsing: Electrical Calculators

Use free electrical calculators for accurate voltage drop, cable sizing, wire ampacity, power factor correction, motor load, Ohm’s Law, transformer sizing, and more. Essential tools for electricians, engineers, and industrial projects.

UPS Load Calculator Total Load (Watts) Total Load (VA) Number of Devices (optional) Voltage (V) Power Factor (PF) UPS Efficiency (%) Desired Backup Time (min) Head‑Room Factor × (over‑sizing) Calculate Reset UPS Sizing Results — * Enter load in either Watts or VA to estimate UPS capacity (kVA) and backup energy. Introduction: Why Proper UPS Sizing Matters…