Free electrical calculators, 1,300+ practice quizzes, and an AI-powered electrician app — built for electricians, engineers, and students working to global standards.
Our calculators and references aren't locked to a single country. Work confidently across the codes that govern electrical installations worldwide.
One platform that takes you from electrical theory to passing your exam to verifying real work on the job.
Study electrical theory, electronics, machines, and wiring codes through guided articles and AI-powered explanations — from Ohm's Law to three-phase power.
Sharpen your skills with 1,338+ practice quizzes across 15 disciplines. Get instant feedback and clear explanations on every question.
Run voltage drop, wire sizing, conduit fill, and load calculations against NEC, BS 7671, AS/NZS, CEC, and IEC — and verify your work before it ships.
From an AI-powered electrician app to free web calculators and 1,300+ practice quizzes — everything in one place.
An AI-powered electrician learning and productivity app with practice quizzes, calculators, and code reference — free on iOS and Android.
14 free, code-accurate calculators for voltage drop, wire sizing, conduit fill, load, and more — with multi-standard support.
1,338+ free electrical & electronics practice quizzes across 15 subject areas — instant feedback, no sign-up.
More electrical tools and apps coming soon from the VoltageLab team
Every calculator is free, mobile-friendly, and references the standard it's built on — NEC, BS 7671, AS/NZS 3000, CEC and IEC.
Not just code questions. Test yourself on power systems, electronics, AC circuits, grounding, and engineering fundamentals — with instant feedback on every answer.
Practical, code-referenced guides on electrical theory, electronics, and exam prep — written for the field.
A complete, code-referenced roadmap to passing your journeyman and master electrician licensing exams on the first attempt.
Read the guideHow to read NEC Table 310.16, apply temperature and bundling corrections, and pick the right conductor ampacity every time.
Read the guideThe difference between grounding and bonding, electrode systems, and how to size your grounding conductors to code.
Read the guideWhat makes VoltageLab the go-to platform for electricians, apprentices, and engineering students worldwide.
An AI study assistant answers code and theory questions and explains the reasoning — adapting from first-year apprentice to master exam candidate.
Work across NEC, BS 7671, AS/NZS 3000, CEC, IEC 60364 and DIN VDE. Calculators cite the exact article or table so you can verify your work.
Every web calculator and all 1,338+ practice quizzes are completely free, no sign-up. The Electrician App is a free download on iOS and Android.
Calculators handle real job-site scenarios — long conduit runs, panel schedules, derating. Built with input from working electricians, not just textbooks.
VoltageLab is an electrical & electronics technology brand building AI-powered tools, apps, calculators, and practice quizzes for electricians, engineers, and students worldwide. Products include the Electrician App, 14 free web calculators, and 1,338+ practice quizzes across 15 disciplines.
Our calculators and references cover NEC (NFPA 70) for the USA, CEC (CSA C22.1) for Canada, BS 7671 for the UK, AS/NZS 3000 for Australia and New Zealand, IEC 60364 internationally, and DIN VDE for Germany and the EU — so you're not locked to a single country's code.
Yes. All web-based electrical calculators on voltagelab.com and all 1,338+ practice quizzes are completely free with no sign-up required. The Electrician App is also free to download on iOS and Android.
Quizzes span 15 subject areas across three disciplines: Electrical (power systems, NEC code, AC circuits, automation, grounding, solar), Electronics (semiconductor devices, digital logic, sensors, components), and Electrical Engineering (Ohm's Law, basic concepts, fundamentals).
Yes. Between the NEC code practice tests, exam-style quizzes, code-referenced calculators, and the AI study tools in the Electrician App, VoltageLab is built to help apprentices and candidates prepare for journeyman and master electrician licensing exams.
For business inquiries, collaboration, guest post, sponsored content, advertisement, jointly work:
Contact us: voltagelabbd@gmail.com
