How many questions are on the TDLR Calculations part?
The Calculations part is 26 questions in 110 minutes, scored on its own at 70 percent to pass. It is separate from the NEC Knowledge part, which is 59 questions in 130 minutes. Since the split, a strong knowledge score no longer covers a weak calculations score, which is why this part fails the most people.
Last reviewed June 2026 · Answered by JourneymanIQ staff
26 questions, 110 minutes
That is just over four minutes a question. Enough time if your setup is clean and your lookups are fast, tight if you freeze or hunt through the book.
Scored separately at 70 percent
You pass or fail the Calculations part on its own. The NEC Knowledge part is judged separately. You have to clear both, so you cannot lean on your stronger side.
Why it is the hard part
The most recent published pass rate on the Calculations part was 20.56 percent, the lower of the two. Treat it as its own exam and give it the practice it deserves.
26 questions, 110 minutes, 70 percent, scored on its own. Plan for it like a separate exam.
Sources
Practice questions and explanations on JourneymanIQ are original. We paraphrase the NEC and cite article numbers, and we do not reproduce NEC text or real exam questions.
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