Convert between flight levels, feet, metres, and kilometres with standard-pressure notes, RVSM context, and common FL300, FL350, FL410, and FL500 checkpoints.
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Flight level converter Convert altitude between feet, metres, kilometres, and flight levels, then review a standard-pressure
reference sheet that keeps FL050, FL180, FL350, and RVSM context visible. Searches like altitude converter,
flight level converter, flight level to feet converter, and meters to flight level converter all use the same
comparison logic.
Quick examples
How it works
Flight levels are pressure-based shorthand. Under the standard-pressure convention, FL350 means 35,000 feet
and roughly 10,668 metres. This helper converts through metres so feet, metres, and kilometres stay
consistent while the flight-level shorthand remains easy to read.
Use the sheet when you need a flight level converter for briefing, a flight level to feet converter for a
chart check, or a meters to flight level converter for international reference material.
Operational note
Flight level values assume standard pressure at 1013.25 hPa / 29.92 inHg. Actual clearances and transition
levels remain authority- and procedure-dependent, so use this page as a conversion and briefing aid.
Enter an altitude Enter an altitude or flight level to see the equivalent sheet.
Flight level converter: feet, metres, and standard-pressure context explained
A flight level converter is useful when aviation material moves between cockpit-style feet, international metric references, and pressure-based flight levels. The physical altitude has not changed, but the way it is expressed can shift with procedure, documentation, and phase of flight. Search phrases like altitude converter, flight level to feet converter, and meters to flight level converter all point to the same standard-pressure comparison.
Why flight levels are not just another altitude unit
A flight level is a pressure-based shorthand tied to a standard atmospheric reference rather than a direct geometric height above sea level. FL350, for example, means a constant-pressure surface nominally corresponding to 35,000 feet under standard-pressure assumptions.
That distinction matters because a converter can only show the standard-pressure equivalent. Actual altitude assignment and separation still depend on local transition altitude or level, the current altimeter setting, and the governing procedure.
If you searched for an altitude converter, flight level converter, or flight level to feet calculator, you are usually asking for this same relationship between feet, metres, and standard-pressure flight levels.
Feet, metres, and kilometres are ordinary distance conversions once the foot-to-metre relationship is fixed. Flight level adds a pressure-based shorthand where one flight-level unit equals one hundred feet under the standard-pressure convention.
The page therefore converts through metres for the geometric values, then expresses the corresponding standard-pressure flight level as the feet value divided by one hundred. That keeps the table internally consistent while still making the pressure caveat explicit.
The helper shows the same relationship in both directions, so you can treat it as a flight level to feet converter, a feet to flight level converter, or a meters to flight level converter without changing the underlying math.
1 ft = 0.3048 m (exact)
Exact international foot relationship used for feet-to-metre conversion.
1 FL = 100 ft = 30.48 m
Flight-level shorthand under the standard-pressure reference model.
How to use the reference sheet
The equivalent table is the direct conversion result for the selected value. The reference sheet below it is there to anchor common aviation checkpoints such as FL050, FL100, FL180, FL350, and FL410 so your sense check is not just numeric but operationally recognisable.
The warning callout remains important. The table is for conversion and briefing support, not for replacing the altimeter setting, transition-level procedure, or aircraft-specific operating rules used on the day.
That is why the sheet keeps both metric and imperial values visible. In practice, the same lookup can serve as a flight level chart, a quick feet-and-metres converter, and a standard-pressure reminder.
Common checkpoints: FL050, FL100, FL180, FL350, and FL410
FL050, FL100, and FL180 are common milestone values because they are easy to remember and easy to sanity-check against feet and metres. FL100 is the simplest round-number example: 10,000 feet or 3,048 metres.
FL350 is a familiar long-haul cruise reference, while FL410 is a useful upper-band checkpoint in many RVSM operations. Those extra rows help the page answer search intent like FL350 in feet or what does FL180 mean without making the user do the arithmetic by hand.
The reference sheet also includes FL300 and FL500 because those round checkpoints often appear in aviation conversion charts and training examples. FL300 anchors the 30,000-foot / 9,144-metre relationship, while FL500 gives an upper-range sense check for specialist or high-altitude comparisons.
FL050 is a useful lower-airspace checkpoint.
FL100 is the classic round-number flight level example.
FL180 is a common transition-altitude reference in the United States and a familiar operational milestone elsewhere.
FL300 is a common commercial cruise checkpoint.
FL350 is a typical jet cruise reference.
FL410 is a useful RVSM-band reference in many regions.
FL500 is an upper-range reference for specialist aircraft and high-altitude comparisons.
Standard pressure, transition altitude, and transition level
Flight levels are pressure-based, so the number only makes sense against the standard-pressure setting of 1013.25 hPa / 29.92 inHg. That is why a flight level is not the same thing as a live altimeter reading in every operating condition.
The transition altitude and transition level are the procedural bridge between locally referenced altitude and the standard-pressure flight-level system. They are not hard-coded into the conversion result because they vary by jurisdiction and by airspace.
RVSM is an operational context, not a different unit conversion. In many regions the RVSM band runs from roughly FL290 to FL410, which is why aviation references often mention those numbers together.
The helper stays narrow on purpose. It converts the units and gives you a standard-pressure reference sheet, but it does not decide whether a clearance, separation standard, or route structure is valid for a live flight.
RVSM is about operational separation standards, not unit conversion math.
The calculator does not compute pressure altitude from live atmospheric inputs.
The calculator does not replace charts, clearances, or aircraft documentation.
Worked examples and good uses
If you enter FL050, the helper shows 5,000 feet and 1,524 metres. If you enter 3,048 metres, it comes back as FL100 and 10,000 feet. If you enter 35,000 feet, it lands on FL350 and roughly 10,668 metres.
Those examples are enough for aviation homework, briefing prep, or a quick comparison between feet and metres. They are also enough to answer search phrases like flight level 350 in feet, how many feet is FL100, or how to convert metres to flight levels.
This calculator does not compute pressure altitude from live atmospheric inputs and does not determine legal or safe flight levels for a real operation.
It also does not model temporary changes in weather, wind, or temperature because the page is built as a converter and briefing aid rather than a flight-planning engine.
That boundary keeps the result trustworthy. The page remains useful for learning and cross-checking, but it should not be treated as an operational clearance tool.
Frequently asked questions
What does FL350 mean?
FL350 means flight level 350, which corresponds to 35,000 feet under the standard-pressure flight-level convention. It is shorthand for a constant-pressure surface, not a guarantee of geometric altitude in every real-world condition.
How many feet is FL100?
FL100 is 10,000 feet. Under the standard-pressure convention, one flight level equals one hundred feet.
How high is FL300 or FL500?
FL300 is 30,000 feet, or 9,144 metres. FL500 is 50,000 feet, or 15,240 metres. Both are standard-pressure flight-level equivalents, so they are useful for conversion and briefing checks rather than live clearance decisions.
Is a flight level the same as altitude?
Not exactly. A flight level is a pressure-based shorthand that refers to a standard-pressure surface, while altitude is a geometric height above a reference surface.
Why does the page warn about standard pressure?
Because flight levels are pressure-based. Actual operational use depends on the current altimeter setting and the transition altitude or transition level published for the airspace.
Can I convert metres to flight levels?
Yes. Enter metres and the helper converts through the exact foot relationship before expressing the equivalent flight level under standard pressure.
What is RVSM and does it change the result?
RVSM is a separation standard used in certain altitude bands, not a different unit conversion. It changes operational context, but it does not change the feet, metres, or flight-level math.
What is the difference between transition altitude and transition level?
The transition altitude is the altitude where aircraft stop using the local pressure reference and switch toward standard pressure; the transition level is the lowest usable flight level above that transition. Both vary by airspace.
Can I use this for pressure altitude?
No. The helper is a conversion and briefing aid only. It does not compute pressure altitude from live atmospheric inputs.
Why does weather not change the conversion result?
Because the helper converts between fixed units and a standard-pressure convention. Weather affects real-world altitude assignment and performance, but not the unit relationship itself.
