Free maritime tools

Bunker Cost Calculator

Break down bunker expenditure into sea and port components from daily consumption rates, the current bunker price, sea days and port days.

Fill in the consumption and price figures to see the bunker cost breakdown.

How bunker cost is calculated

Bunker cost is split between the sea passage and time in port, because consumption rates differ significantly. Vessels typically burn four to eight times more fuel at sea than at anchor or alongside:

  • Sea bunker cost = sea days x sea consumption (MT/day) x bunker price (USD/MT)
  • Port bunker cost = port days x port consumption (MT/day) x bunker price (USD/MT)
  • Total bunker cost = sea bunker cost + port bunker cost

For voyage cost and TCE calculations, the total bunker cost is usually expressed as a daily figure (total / voyage days). Port consumption covers auxiliary engines, heating coils and cargo gear; it varies widely by vessel type and cargo. Use the voyage cost calculator to combine this output with port charges and commissions.

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Results are indicative only and do not constitute financial, chartering or legal advice. Verify against your charter party terms and current market data.

Bunker Cost Calculator (Free) | True Fathom