Specific Range Calculator
Compute the specific range as nauticalMilesPerKg = trueAirspeedKt / fuelFlowKgPerHour.
Description
Calculate nautical miles flown per kilogram of fuel at one stated flight condition.
Specific Range Calculator calculate nautical miles flown per kilogram of fuel at one stated flight condition.
Use this to compare range efficiency between steady operating points when true airspeed and total mass fuel flow are known on the same basis.
When to use Specific Range Calculator
Use this to compare range efficiency between steady operating points when true airspeed and total mass fuel flow are known on the same basis.
How it works
Specific range is true airspeed in nautical miles per hour divided by fuel flow in kilograms per hour, producing nautical miles per kilogram.1
Interpreting the result
Keep the input units, direction conventions, encoding, and ordering rules visible when reusing the result. Preserve the full returned value for downstream calculations and round only for presentation.
Assumptions and limitations
This is an instantaneous condition metric, not trip range. Weight, altitude, temperature, speed schedule, wind, climb and descent, reserves, and changing fuel flow all affect realized range.
References
-
Pilot's Handbook of Aeronautical Knowledge — Federal Aviation Administration