Electrical Calculators & Reference Tools
Fast, practical tools for electrical calculations, unit conversions, engineering charts, and technical reference. Built for electricians, engineers, students, and solar installers.
Tool Categories
Explore Electrical Utilities by Topic
Electrical Calculators
Ohm's law, power, voltage, current, and circuit resistance calculations.
Wire & Cable
Voltage drop over distance, conductor gauge sizing, and thermal ampacity.
Battery & Power
Battery runtime, required capacity (Ah/Wh), and inverter wattage sizing.
Solar & Off-Grid
Solar array sizing, peak sun hour production, and inverter headroom.
Motors & Protection
Motor full-load current, starter sizing, breaker selection, and overload settings.
Converters
AWG to mm², Watts to Amps, Volts to Watts, and kW to Horsepower.
Charts & Tables
Searchable AWG wire charts, battery state-of-charge, and schematic symbols.
Electrical Reference
Master formula cheat sheets, Ohm's law circle, and theory guides.
Calculators
Popular Electrical Calculators
Ohm's Law Calculator
Calculate Voltage, Current, Resistance, and Power simultaneously.
Voltage Drop Calculator
Compute line voltage drop, loss percentage, and load voltage for single & 3-phase.
Conduit Fill Calculator
Visual NEC Chapter 9 raceway sizer with 40% fill rule and jam warnings.
Motor Full-Load Current & Breaker Sizer
Size motor conductors (125%), breakers (250%), and fuses per NEC 430.
Wire Size Calculator (AWG & mm²)
Find recommended conductor gauges to stay within NEC 3% voltage drop limits.
Circuit Breaker Sizing Calculator
Determine standard breaker ampere ratings applying the 125% continuous rule.
Popular Unit Converters
Instant bidirectional electrical unit translations
Recently Added & Spotlights
Latest reference guides and interactive utilities
About VoltBase Pro
Engineered for Speed, Clarity, and Precision
VoltBase Pro is a dedicated technical utility platform created to replace cluttered, ad-ridden web calculators with fast, pure client-side tools that respect your time and privacy.
- 100% In-Browser Computations: Zero backend latency or server round-trips.
- Formulas & Step-by-Step Transparency: Every calculation shows the exact physical formula and step derivation.
- Strict Mathematical Separation: Physical calculations are clearly separated from code-dependent regulatory rules.
Quick Platform Summary
- Calculators
- 20+
- Converters
- 7
- Reference Charts
- 4
- Guides & Reference
- 11