A method for computing drop zone data onboard an aircraft is provided. The method obtains, by a processor, current drop zone parameters for an air drop, during flight of the aircraft; receives, by the processor, changes to dynamic conditions associated with operation of the aircraft, wherein the dynamic conditions comprise at least one of wind speed, drop altitude, current temperature, angle of approach, aircraft speed, and number of stages of planned drop; calculates, by the processor, updated drop zone parameters, based on the current drop zone parameters and the changes to the dynamic conditions; and presents the updated drop zone parameters, via a display device.