VerElect — Electrical Engineer

VerElect is an electrical engineering calculator for field work, design checks, and learning. Explore circuit fundamentals, power systems, and solar PV with built-in NEC 2023, IEC 60364, and BS 7671 reference tables.

CIRCUITS & AC POWER
Calculate voltage, current, resistance, and power with Ohm's Law. Combine series and parallel resistors, analyze RLC impedance and resonance, and convert star-delta networks. Work with power triangles, power factor correction, single-phase and three-phase power, and kVA sizing.

WIRE & CABLE
Check voltage drop, select wire sizes by standard, and apply temperature and conduit-fill derating. Calculate conduit fill, cable resistance, and conductor weight for copper and aluminum.

MOTORS & TRANSFORMERS
Look up motor full-load current from NEC tables. Estimate starting current, torque, synchronous speed, slip, and efficiency. Size transformers and calculate impedance, short-circuit contribution, voltage regulation, efficiency, and turns ratio.

PROTECTION & LIGHTING
Estimate available fault current, breaker size, ground-rod resistance, and equipment grounding conductor size. Arc-flash calculations provide screening estimates with stated assumptions. Plan lighting with the lumen method, room cavity ratio, lux-lumen conversion, and connected load.

POWER QUALITY
Calculate total harmonic distortion, transformer K-factor, crest factor, tuned LC filters, and harmonic derating. IEEE 519 reference values provide context; they do not replace a complete compliance assessment.

SOLAR PV
- Panel sizing with tilt, shading, and temperature effects
- PV cell/module Pmax, fill factor, and conversion efficiency
- Operating power at site irradiance and cell temperature
- Inverter sizing and DC/AC ratio
- Battery capacity, discharge limits, and autonomy
- Payback period and lifetime savings
- Series-parallel strings checked against voltage and current limits

ELECTRONICS & REFERENCE
Calculate LED resistors, battery runtime, voltage dividers, resistor color codes, and energy costs. Convert units and search electrical formulas.

BUILT FOR EVERYDAY USE
- Parameter guidance with ranges or worked examples
- Calculator guides with formulas and example problems
- Calculation history, favorites, and quick tool switching
- Copy, share, and export results to PDF
- SI and Imperial display options
- Layouts for iPhone and iPad
- Available in 14 languages
- Works offline, with no account required

Pay once. No subscriptions, advertising, or in-app purchases.

VerElect is a reference and educational tool. Always verify results against applicable codes, standards, and local regulations. It does not replace professional engineering judgment. Consult a licensed electrician or engineer for critical installations.

References include NEC 2023 (NFPA 70), IEC 60364-5-52, and BS 7671:2018. Each tool identifies its formulas, assumptions, and applicable references.