
Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Months to reach requirement
20.0
Approx. years
1.67
Hours remaining
1,200

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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter current total hours.
- 2Enter atp hour requirement.
- 3Enter expected average hours flown per month.
- 4Read your months to reach requirement on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Airlines require the ATP certificate, which under 14 CFR 61.159 needs 1,500 total flight hours for the unrestricted certificate (with reduced-hour paths of 750-1,250 hours for certain military, degree, or restricted ATP pathways). Most new commercial pilots build the bulk of these hours as flight instructors, since it's one of the few entry-level jobs that pays to fly rather than requiring you to pay. This calculator projects months to reach 1,500 hours given your starting hours and expected monthly flying pace.
Worked example
Using the values the calculator loads with:
Inputs
- Current total hours: 300
- ATP hour requirement: 1500
- Expected average hours flown per month: 60
Results
- Months to reach requirement: 20
- Approx. years: 1.67
- Hours remaining: 1,200
What each field means
Inputs
- Current total hours
- The current total hours used in the calculation. Starts at 300 so you have a working example on load.
- ATP hour requirement
- The atp hour requirement used in the calculation. Starts at 1500 so you have a working example on load.
- Expected average hours flown per month
- The expected average hours flown per month used in the calculation. Starts at 60 so you have a working example on load.
Results
- Months to reach requirement
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Approx. years
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Hours remaining
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why is 60 hours/month a reasonable flight instructor estimate?
A busy, well-booked CFI at a productive flight school commonly logs 50-80 hours per month, though weather, aircraft availability, and student cancellations often push the realistic average toward 40-60. Airline-owned or academy CFI pipelines sometimes guarantee higher utilization since they control scheduling and aircraft availability more tightly.
What are the reduced-hour ATP paths?
A bachelor's degree with an aviation major from a part 141 school can qualify for a Restricted ATP at 1,000 hours; an associate's degree in aviation qualifies at 1,250 hours; certain military pilots qualify at 750 hours. These restricted ATPs let you fly for a Part 121 airline before hitting the full 1,500 but carry limitations (like captain upgrade restrictions) until full requirements are met.
Does simulator or ground instruction time count toward the 1,500?
No — flight instructor ground instruction time doesn't count as flight time. Only actual flight hours (dual given as a CFI counts as PIC time for the instructor) accumulate toward the ATP total, which is why the job needs to put you in the airplane, not just in a classroom, to be useful for time-building.
What comes after hitting 1,500 hours?
You still need the ATP written exam, ATP-CTP (a mandatory multi-day academic and simulator course for the unrestricted ATP), and the ATP practical test, typically in a multi-engine aircraft or simulator, before an airline will move you into new-hire training. Budget both time and several thousand dollars for this final step beyond just accumulating hours.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). ATP Minimums Timeline Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/atp-minimums-timeline
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/atp-minimums-timeline" target="_blank" rel="noopener">ATP Minimums Timeline Calculator — RevenueLab</a> (2026).</p>
Source: [ATP Minimums Timeline Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/atp-minimums-timeline) (2026).
