Electrical Tools
24 free tools built for your trade. Real NEC formulas, real benchmarks, real terminology.
Technical Calculators
Wire sizing, voltage drop, and NEC code tools
Wire Size Calculator
Find the right AWG for any circuit with NEC ampacity and voltage drop checks.
Voltage Drop
Calculate voltage drop by wire gauge, distance, and load. NEC compliance check included.
Conduit Fill
Check conduit fill per NEC Chapter 9. Supports EMT, PVC, RMC, and all wire types.
Panel Load
Calculate service demand load per NEC Article 220 with demand factors.
Service Size
Find the right service amp size for any home or building.
Transformer Sizing
Size a transformer by load, voltage, and power factor. Single and 3-phase.
Box Fill
Check box fill per NEC 314.16 for outlet and junction boxes.
3-Phase Power
Calculate kW, kVA, amps, and power factor for 3-phase systems.
Business & Pricing
Margins, rates, and job costing
Profit Margin
See your real margin on any job. Pre-loaded with electrical benchmarks.
Labor Rate
Find out what you actually need to charge per hour to be profitable.
Service Call Pricing
Price a service call with electrical-specific parts and labor.
Flat Rate Builder
Build flat-rate prices for common electrical jobs. Compare to national averages.
Parts Markup
Calculate sell price and margin on electrical parts at any markup.
Job Costing
Price a full electrical job with materials, labor, permits, and margin targets.
Business Valuation
Estimate what your electrical business is worth.
Overhead Calculator
Know your true break-even by adding up all electrical business costs.
Templates & Documents
Invoices, estimates, and checklists
Invoice Generator
Professional electrical invoices with circuit details and NEC references. PDF ready.
Estimate Template
Itemized estimates with materials, wire sizes, and permit scope. PDF ready.
Work Order
Complete work orders with circuit details and safety checklists.
Service Checklist
Complete electrical service checklist. Interactive + printable PDF.
Service Agreement
Build maintenance contracts with tiered pricing. Revenue projections included.
Inspection Report
Professional inspection reports with NEC code violation tracking.
Sales Tools
Customer-facing calculators
All 24 tools are 100% free.
Pick a tool above and get to work.