Pass Your Electrician Exam
Free NEC calculators to sharpen your code knowledge, with a full exam prep platform on the way - question bank, timed practice exams, and progress tracking.
Free NEC Calculators & Tools
Built for electricians studying the NEC. No sign-up required.

Conduit Fill Calculator
FreeCalculate conduit fill percentage per NEC Chapter 9. Select conduit type, size, and wire configuration to verify code compliance.

Voltage Drop Calculator
FreeCalculate voltage drop for any circuit. Verify compliance with the NEC 3% branch circuit and 5% total drop recommendations.

Box Fill Calculator
FreeCalculate electrical box fill per NEC 314.16. Add conductors, clamps, devices, and grounds to verify box capacity.

Breaker Size Calculator
FreeDetermine the correct breaker size for your circuit. Accounts for continuous and non-continuous loads per NEC 240.6(A).

Ohm's Law Calculator
FreeCalculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to find the other two.

Wire Size Calculator
FreeFind the right wire size for your circuit. Accounts for ampacity, temperature derating, bundling, and voltage drop.
Find Your State
Every state has different licensing requirements, exam formats, and NEC editions. Get state-specific prep.
Coming soon: California, Florida, Illinois, Ohio, North Carolina, Georgia, New York
Exam Prep Platform
Everything you need to pass your electrician exam - study at your own pace with instant feedback and detailed explanations.
- Question bank with NEC code references and explanations
- Timed practice exams matching PSI testing conditions
- Progress tracking & weak-area analysis
- Streak tracking and personalized study recommendations
The Texas Electrician Exam Is Hard
Most people fail. Electrician Prep gives you the edge.
72%
of test-takers fail the Texas exam
~79%
fail the Calculations portion
750+
NEC practice questions
2023
NEC edition coverage
Source: Texas TDLR Licensing Exam Statistics, FY2024–FY2025
Frequently Asked Questions
What is the format of the journeyman electrician exam?
The exam is typically split into two separately-timed portions: NEC code knowledge and electrical calculations. For example, the Texas exam has 85 questions - 59 NEC Knowledge (130 min) and 26 Calculations (110 min). The exact format varies by state - check your state page for details.
Which edition of the NEC does the exam cover?
Most states have adopted the 2023 NEC (National Electrical Code). Some states may still use the 2020 NEC or have state-specific amendments. Electrician Prep keeps track of the current NEC edition for each state.
How much does Electrician Prep cost?
Our NEC calculators and tools are completely free - no sign-up required. The full exam prep platform (question bank, timed exams, progress tracking) is available with plans starting at $49/month or save with a 3-month or 6-month pass.
What's included in the exam prep platform?
The platform includes a question bank with hundreds of NEC-based questions, timed practice exams that match your state's format, detailed explanations for every answer, progress tracking, and weak-area analysis to focus your study time.
Can I bring my NEC codebook to the exam?
Most journeyman electrician exams are open-book - you can bring your NEC codebook. However, you typically cannot use tabbed or highlighted editions. Check your state's specific rules, as some exams are closed-book.
What score do I need to pass?
Most states require a score of 70% or higher to pass the journeyman electrician exam. Some states set the bar at 75%. Check your state page on Electrician Prep for the exact passing score in your jurisdiction.
Simple, Affordable Pricing
Start with free tools. Upgrade when you're ready to prep for the exam.
Monthly
$49/month
- Full question bank
- Timed practice exams
- Progress tracking
- Detailed explanations
3-Month Pass
Best Value$99 one-time
$33/month - save 33%
- Everything in Monthly
- Best value for exam prep
- Study at your own pace
- One-time payment
6-Month Pass
$149 one-time
$25/month - save 49%
- Everything in Monthly
- Maximum savings
- Full exam prep cycle
- One-time payment
Ready to Start Studying?
Try the free diagnostic quiz to see where you stand, then subscribe for full access to the question bank and timed exams.