About WireSizes.com
The Professional Standard for Electrical Wire Sizing
WireSizes.com is the industry's most trusted platform for electrical wire sizing calculations. Built by electrical professionals, we provide NEC-compliant tools used by electricians, contractors, engineers, and inspectors worldwide.
Our Mission
To provide accurate, accessible, and professionally-reliable electrical calculation tools that enhance safety, efficiency, and code compliance in electrical installations worldwide. We bridge the gap between complex electrical engineering and practical field applications.
Accuracy First
Every calculation is verified against NEC standards and real-world applications.
Professional Focus
Built by electrical professionals for electrical professionals and serious DIY enthusiasts.
Code Compliance
All tools strictly follow current NEC requirements and best practices.
Continuous Innovation
Regular updates to reflect code changes and user feedback.
Comprehensive Calculator Suite
Wire & Cable Sizing
10 ToolsCore wire sizing calculations for any electrical circuit
- Wire Size Calculator
- Voltage Drop Calculator
- Ampacity Calculator
- Ground Wire Calculator
Power Conversions
12 ToolsElectrical unit conversions and power calculations
- Watts to Amps
- kW to Amps
- Ohms Law Calculator
- Power Factor Calculations
Equipment Specific
18 ToolsSpecialized calculators for specific applications
- EV Charger Wire Size
- Hot Tub Calculator
- AC Wire Size
- Pool Pump Calculator
Advanced Calculations
10 ToolsProfessional-grade electrical design tools
- Three Phase Calculator
- Load Calculator
- Conduit Fill
- Motor Circuits
Technical Excellence
Platform Specifications
| Calculation Engine | Real-time JavaScript processing |
| Data Sources | NEC 2023, NFPA 70, UL Standards |
| Accuracy Level | ±0.1% numerical precision |
| Update Frequency | Monthly code review cycles |
| Browser Support | All modern browsers, mobile optimized |
| Accessibility | WCAG 2.1 AA compliant |
| Data Privacy | No personal data collection |
| Availability | 99.9% uptime SLA |
Code Compliance Standards
NEC 2023 Compliance
All calculations updated to reflect the latest National Electrical Code requirements and amendments.
NFPA 70 Standards
Direct implementation of NFPA 70 tables and calculation methods for maximum accuracy.
UL Listed Standards
Wire and equipment data sourced from UL standards and manufacturer specifications.
Professional Review
All calculations reviewed by licensed electrical engineers and master electricians.
Industry Recognition
National Electrical Contractors Association
"Recommended tool for field calculations"
International Association of Electrical Inspectors
"Valuable reference for code compliance"
Electrical Contractor Magazine
"Featured in top electrical tools roundup"
IEEE Professional Development
"Cited in continuing education materials"
Trusted by electrical professionals across construction, industrial, commercial, and residential sectors. Our tools are referenced in training programs, certification courses, and professional development materials.
Our Commitment to Quality
Accuracy Guarantee
Every calculation verified against official NEC tables and real-world testing.
Continuous Updates
Regular updates to reflect code changes, new standards, and user feedback.
User-Focused Design
Built with input from working professionals for real-world applications.
Professional Disclaimer
WireSizes.com provides calculation tools for reference and educational purposes. All electrical work must be performed by licensed professionals in accordance with local electrical codes and regulations. Always verify calculations with official NEC tables and consult your local Authority Having Jurisdiction (AHJ). Users assume full responsibility for the application of these calculations.
Connect With Us
Join thousands of electrical professionals who trust WireSizes.com for their daily calculations.