How many hours should you study for the FE?
Most people land between 150 and 300 hours. Where you fall in that range depends far less on your discipline than on how long ago you last saw the material.
It's worth knowing up front that NCEES publishes no required study time. The numbers you see quoted — 300 hours most often — are prep-industry convention, not an official standard. They're a reasonable starting point, but treat them as a budget to adjust rather than a target to hit.
The FE is a breadth exam. It covers a wide span of undergraduate topics at a shallow depth, which means the work is mostly recall and speed rather than deep problem-solving. If you sat these courses in the last year or two, a lot of your time goes to practice problems and getting fast with the reference handbook. If it's been longer, a real share of it goes to relearning material you genuinely no longer remember — and that's the difference between a 150-hour plan and a 300-hour one.
The other thing that moves the number is how well your degree lines up with the discipline you sit. Taking FE Mechanical with a mechanical degree is a different amount of work from taking FE Other Disciplines with a specialised background, because the second one asks you to cover ground your coursework never did.
Recent graduate, still in or just out of school~150 hoursThe material is fresh. Most of your time goes to timed practice and learning where things live in the reference handbook, not to relearning theory.
Two to five years out~220 hoursYou'll recognise everything but reproduce little of it under time pressure. Expect real relearning on the topics your job never touches.
Five or more years out~300 hoursAssume you are relearning most subjects from a standing start, and give the heavily-weighted topics genuine runway rather than a token pass.
These are the starting budgets Study Scheduler suggests when you pick a preparedness level in setup. Every one of them is a slider you can move — the plan re-paces itself around whatever number you settle on.