THE AIRLINE PILOTS FORUM & RESOURCE

This app helps calculate either the fuel required for an inflight diversion (if the distance is known) or the distance that can be covered (if the fuel is known), factoring in aircraft speed and fuel flow rate. You can adjust the fuel flow multiplier depending on engine usage — for example, use 1 for single-engine or 2 for dual-engine operation. If a reserve fuel value is entered, it will automatically be added to the fuel requirement (increasing the required fuel) or excluded from fuel consumption (reducing the distance that can be covered).