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.
Sizing the wrong VA rating can destroy your UPS, inverter, or solar system in minutes. I’ve seen it happen usually, a plant maintenance crew in Ohio swapped out a failed UPS, grabbed a unit that matched the watt load on the nameplate, and had it trip under full load within the first hour. The problem…
Last Updated: June 26, 2026 Industrial Voltage Drop Calculator – Professional Authority Tool Industrial Voltage Drop Pro Authority Sizing & Compliance Engine 🖥 Auto ☀ Light 🌙 Dark NEC (USA/Canada) IEC (International) 1. System Configuration Circuit Phase 3-Phase (4-Wire)1-Phase (2-Wire)DC System Voltage (V) Load Current (Amps) Run Distance (ft) 2. Conductor Choice Material Copper (Cu)Aluminum…
How to Size Cables for Motor Circuits the Right Way Using IEC 60364 Let me start with something I’ve seen too many times on site. A brand new motor trips within minutes of startup. The contactor is fine. The overload setting is correct. Protection coordination checks out. But the cable is undersized, the voltage drop…
3-Phase Power Calculator to convert between kW, kVA and amps using voltage, power factor and configuration for accurate motor, cable, breaker and generator sizing. 3‑Phase Power Calculator Line‑to‑Line (V LL) Line‑to‑Neutral (V LN) Voltage (V) Current (A) Power Factor (PF) Efficiency (%) (optional) Calculate Reset 3‑Phase Power Results — * Enter line voltage (V), current (A), and power factor to compute kW, kVA, and kVAR. In a clean Excel sheet, every motor is perfectly balanced, every breaker is sized exactly right, and the grid…
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 There’s nothing quite like the panic that sets in when the lights flicker, your monitor goes black, and that unsaved spreadsheet (or worse, your server configuration) vanishes into the void. That’s the moment you truly…
Free NEC wire size calculator for electricians. Calculate required AWG or kcmil conductor size based on voltage drop (NEC Chapter 9) and ampacity (NEC Table 310.16). Covers copper and aluminum, single and three-phase, residential and industrial circuits.
Watts to Volts Calculator DC 1‑Phase AC 3‑Phase AC 3‑phase voltage type Line‑to‑Line (VLL)Line‑to‑Neutral (VLN) Power Power unit W (watts)kW (kilowatts)VA (volt‑amps)kVA (kilo volt‑amps) Current (A) Power Factor (PF) Calculate Reset Voltage (V) — Watts to Volts Calculator — Complete Guide for Engineers and Electricians Every Watts to Volts Calculator relies on one timeless rule:…
Watts to Amps Calculator DC 1-Phase AC 3-Phase AC 3-Phase voltage type Line-to-Line (VLL)Line-to-Neutral (VLN) Power Unit W (watts)kW (kilowatts)VA (volt-amps)kVA (kilo VA) Voltage (V) Power Factor Calculate Reset Current (A) — Understanding the kw to amps calculator In simple words, kilowatts measure the equipment’s output, while amperes reflect the amount of electrical current flowing…
kVA to Amps Calculator kVA to Amps Calculator Apparent Power (kVA) Phase Single-Phase (1Φ)Three-Phase (3Φ) Voltage (V) 120 V208 V230 V240 V400 V415 V460 V480 VCustom Voltage Enter Custom Voltage (V) Calculate Clear Copy Result Result: Formula: Select parameters to display Quick Industry Presets 25 kVA @ 480V (3Φ) 15 kVA @ 240V (1Φ) 50…