NECalcul8r: NEC Calculator

NECalcul8r is a purpose-built electrical calculation tool for electricians, contractors, technicians, inspectors, apprentices, and students.
Designed around real-world electrical work, NECalcul8r helps you perform and understand NEC-based calculations using a clean, mobile-friendly workflow.
Use NECalcul8r for:
• Practical electrical calculations
• Clear inputs and easy-to-read results
• Step-by-step calculation guidance
• Field work, estimating, planning, and training
• Electrical code study and result verification
Whether you are working in the field, preparing an estimate, reviewing a design, or learning electrical calculations, NECalcul8r provides convenient tools to help you work more efficiently and confidently.
Important: NECalcul8r is provided as a reference and calculation aid. Always verify results against the applicable NEC edition, project documents, manufacturer instructions, and requirements of the authority having jurisdiction.
NEC is a registered trademark of the National Fire Protection Association. NECalcul8r is not affiliated with or endorsed by the NFPA.