When it comes to takeoff performace, your POH is always the place to make your final decisions. But if you're looking to make some quick estimates, here are 7 rules-of-thumb that will help...

1) A 10% increase in weight results in a 20% increase in takeoff distance.

2) A 10% increase in weight results in only a 5% increase in takeoff speed.

3) A headwind that's approximately 10% of your takeoff speed will reduce your takeoff roll by 20%.

4) In most GA aircraft, for every 2 knots of tailwind, your takeoff distance increases 10%.

5) On a sloped runway, if the tailwind is more than 10% of your takeoff speed you should consider taking off uphill with a headwind. (Assuming no more than 2% runway gradient)

6) Increase your takeoff distance 10% for each additional 1,000 feet of density altitude.

7) Increase your takeoff distance 12% for every 15 degrees warmer than standard.

What rules of thumb do you use for quick performance calculations? Tell us in the comments below!

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