Passage planning

Fuel & range

Endurance and range from tank capacity, burn rate, and cruise speed, holding back a reserve.

Inputs

Fuel capacity (gal)

Burn rate at cruise (gal/hr)

Cruise speed (kn)

Reserve to hold back (%)

Result

Usable fuel—

Endurance—

Range at cruise—

Nautical miles per gallon—

Figures are theoretical, at steady cruise in calm conditions — sea state, wind, current, and load all change real burn rate. Use as a planning baseline, not a fuel gauge.