Estimate fuel use and cost for a fishing trip from distance, speed, fuel burn, and price.
Account for wind, waves, detours, and idling with adjustment factors, then combine round trips or multiple legs in one calculation.
Input
Port -> Fishing ground 18nm / 12kt Fishing ground -> Port 18nm / 11kt Fuel burn 20L/h Fuel price 155JPY/L Idle time 35 min Safety factor 1.15 Idle factor 0.30
Output
Estimated fuel use 76.2L Estimated fuel cost JPY 11,805
Input
Outbound 12km / 24km/h Return 12km / 22km/h Fuel burn 1.2L/nm Fuel price 160JPY/L Idle time 20 min Safety factor 1.10 Idle factor 0.30
Output
Estimated fuel use 18.7L Estimated fuel cost JPY 2,999
Input
Same conditions as Example 1 Catch weight 120kg
Output
Cost per kg JPY 98/kg
nm
A nautical mile; 1 nm equals 1.852 km.
kt
A knot; 1 kt means 1 nautical mile per hour.
L/h
Fuel use per hour of running time.
L/nm
Fuel use per nautical mile. If you enter distance in km, the tool converts it to nm internally first.
Safety factor
A multiplier that conservatively covers wind, waves, detours, and handling losses.
Often. Use the safety factor as a conservative allowance. A rough guide is Calm 1.05, Normal 1.15, or Rough 1.30, but adjust it for your vessel and conditions.
Use L/h when your fuel data is time-based, and L/nm when it is distance-based.
Yes. Add as many legs as you need, or use the same-distance return-leg shortcut when the outbound and return distances match.
Idling fuel is estimated as a ratio of running fuel burn per hour. In L/nm mode, the tool derives an L/h equivalent from the weighted average speed.
Yes. The page supports multiple languages, unit switching, locale-aware number formatting, and RTL layouts. Currency display is fixed to JPY in version 1.