Electrical
24 tools · 461 pagesProfessional electrical calculators, conversion references, and NEC-oriented lookup tools.
Professional Conversion
Tools & Calculators
Free engineering-grade calculators, reference tables, and unit conversions. Built for tradespeople, builders, and engineers who need accurate answers fast.
26
Calculators
842
Reference Pages
2
Industries
Popular Tools
View all →
formula
AWG to mm²
Convert American Wire Gauge sizes to cross-sectional area in square millimeters.
lookupAWG to Ampacity
Lookup AWG ampacity ratings by insulation temperature class using NEC-style reference values.
calculatorVoltage Drop Calculator
Estimate circuit voltage drop from gauge, distance, load current, system voltage, and phase.
calculatorConduit Fill Calculator
Estimate conduit fill compliance and maximum conductor counts using NEC fill percentages.
calculatorOhm's Law Calculator
Solve voltage, current, resistance, or power using classic Ohm's law relationships.
calculatorElectrical Power Calculator
Calculate electrical power for single-phase or three-phase systems with optional power factor.
calculatorSingle-Phase Current Calculator
Compute single-phase current draw from real power, voltage, and power factor.
calculatorThree-Phase Current Calculator
Calculate three-phase line current from power, line voltage, and power factor.
Browse by Industry
Woodworking
2 tools · 381 pagesBoard feet calculators and woodworking reference tools for estimating materials.
Every Tool Includes
▦
Instant Calculator
Live results as you type. No page reloads, no sign-ups.
☰
Reference Table
Pre-computed values for quick lookup. Linked to individual detail pages.
✓
Industry Standards
NEC tables, engineering formulas, and trade-standard data you can trust.
⚙
Works Everywhere
Fast on any device. No app to install. Bookmark and go.