UAS Fuel Usage and Endurance Calculator

Estimate fuel mass, usable mission fuel, endurance, range and target margins from measured fuel consumption.

richie woods

A fuel-volume and mission-reserve assessment for combustion and hybrid UAS using representative measured fuel flow.

Local calculation: values are processed in your browser and are not transmitted. Optional profiles are stored only in this browser.
Active profile: Manual values
kg/L
Planning value only. Replace it with verified fuel data at the relevant temperature.
L
L
% usable
L/h
Use measured consumption for the aircraft, engine, propeller and operating condition.
km/h
min
km

Planning output only. Verify assumptions and results against authoritative data, manufacturer information, approved procedures, test evidence and competent engineering or regulatory review before use.

Calculation basis

Loaded fuel mass is volume multiplied by the entered density. Unusable fuel is removed first, then the entered operational reserve is held back. Endurance uses representative volume flow; still-air range uses the entered cruise speed. The target comparison uses whichever of duration or distance requires more fuel.

Limitations and verification

  • Fuel density varies with grade, batch and temperature; preset values are planning defaults rather than release data.
  • A single burn rate does not model start, warm-up, climb, loiter, descent, manoeuvre, mixture, altitude or engine-condition effects.
  • This tool does not assess fuel compatibility, approved grades, tank geometry, feed reliability, thermal management or regulatory reserve requirements.

Version and review status

Formula set: v1.2
Staging review date: 17 August 2026
Status: Staging beta pending user acceptance and cross-browser checks.