Most used
Electrical Bid Calculator
Calculate labor, materials, overhead, profit margin, and tax in real time to produce a fast, defensible bid.
Open ToolFree Tools
Electrical Contractor Toolbox
Practical tools and NEC calculators you can use right now to scope faster, quote cleaner, and keep your office and field teams aligned.
Electrical Code Calculators
NEC calculators for the field
Tested voltage drop, wire size, conduit fill, and box fill calculators built on NEC tables. Planning aids only — always verify with the current NEC and your AHJ.
NEC Ch. 9
Voltage Drop Calculator
Estimate single- and three-phase voltage drop in volts and percent using NEC Chapter 9 Table 8 resistance values.
Open CalculatorNEC 310.16
Wire Size Calculator
Size a conductor against NEC Table 310.16 ampacity with ambient and bundling derating, plus your voltage-drop limit.
Open CalculatorNEC Ch. 9
Conduit Fill Calculator
Size conduit for mixed conductor groups against NEC Chapter 9 Tables 1, 4, and 5 fill limits.
Open CalculatorNEC 314.16
Box Fill Calculator
Estimate required box volume in cubic inches using NEC 314.16(B) allowances for conductors, yokes, grounds, and clamps.
Open CalculatorNEC 220
Electrical Load Calculator
Calculate residential and commercial service and feeder loads using NEC Article 220 standard method with demand factors.
Open CalculatorPanel scheduling
Panel Schedule Calculator
Assign circuits to a breaker panel, track load per phase, and check panel utilization and phase balance.
Open CalculatorField bending
Conduit Bending Calculator
Calculate offset bends, 3-point saddles, 90° stub-ups with take-up, and back-to-back bends for EMT and RMC conduit.
Open CalculatorNEC 310.16
Wire Ampacity Reference
Look up NEC Table 310.16 allowable ampacity by wire size, conductor material, and temperature rating with ambient correction.
Open CalculatorFree Templates
Ready-to-use templates
Download editable templates for the documents electrical contractors send every week.
Job record
Electrical Work Order Template
Capture job scope, materials, labor, approvals, photos, and invoice handoff in PDF, CSV, Markdown, HTML, or plain text.
Open TemplateQuoting
Electrical Estimate Template
Build customer-ready electrical estimates with scope, line items, terms, and optional proposal copy in five editable formats.
Open TemplateBilling
Electrical Invoice Template
Turn completed work into a clean electrical invoice with customer details, labor, materials, totals, and payment notes.
Open TemplateSafety prep
Electrical Safety Checklist
Use a field checklist for PPE, lockout/tagout, panel conditions, hazards, photos, and closeout notes before work starts.
Open TemplatePermit prep
Electrical Permit Application Template
Collect property, contractor, scope, load, AHJ, fee, and inspection details before completing the official local permit form.
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