Reference: Take-off and Landing Distance Performance Corrections

The following conditions are cumulative and should be added up.

Condition Amount Increase in Take-off Distance Increase in Landing Distance
Weight Increase in weight of 10% + 20% + 10%
Altitude Increase in altitude of 1.000 feet + 10% + 5%
Temperature Increase in temperature of 10 degrees + 10% + 5%
Grass Runways Dry + short (13 cm) + 20% + 20%
Dry + long (13 – 25cm) + 25% + 30%
Wet + short (13 cm) + 25% + 30%
 Wet + long (13 – 25cm ) + 30% + 40%
Tailwind A tailwind component of 10% lift off speed 20% 20%
Soil soft runway or snow 25% or more 25% or more

Take-off distance: Ground roll + distance to 50 ft obstacle

Landing distance: Distance from 50ft obstacle to touchdown and landing roll

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