How to use this calculator
- Enter stall speed. Use the relevant 1g stall speed from approved aircraft data.
- Enter load factor. Use the positive limit load factor for the aircraft category you are checking.
- Read Va. Review the calculated maneuvering speed and speed margin over the 1g stall.
- Check weight. If the aircraft is below reference weight, run the Va weight-adjustment page too.
How it works
The calculator uses Va = Vs x sqrt(n). Stall speed increases with the square root of load factor, so the maneuvering-speed estimate follows the same relationship.
Pair it with stall speed, load factor and Va weight adjustment when checking the same aircraft.
Worked example
Verified against the live calculator
With a 50 kt 1g stall speed and a 3.8 g positive limit load factor, Va = 50 x sqrt(3.8) = 97.5 kt before aircraft-specific corrections.
Frequently asked questions
How is maneuvering speed Va calculated?
This calculator uses Va = Vs x sqrt(n), where Vs is the relevant 1g stall speed and n is the positive limit load factor.
Which stall speed should I enter?
Use the aircraft-specific stall speed for the configuration and weight you are checking. The POH or AFM is the authority.
Does Va change with weight?
Yes. Maneuvering speed decreases as aircraft weight decreases. Use the adjacent Va weight-adjustment calculator when your manual supports that relation.
Can I use this for flight decisions?
No. Treat it as a training and screening tool only. Approved aircraft limitations, placards and manuals control real operation.
Method & assumptions
- Uses a simplified Va relationship from 1g stall speed and positive limit load factor.
- Does not replace approved POH/AFM speeds, placards, category limits, turbulence guidance or instructor judgment.