Work out bunker cost instantly with clear inputs, formula shown and shareable results.
Bunkers are bought by mass but delivered by volume, so the density at the reference temperature converts between them — a key check on the bunker delivery note. All-in cost per tonne adds barging and delivery charges, which can be significant for small stems.
Bunker cost
Total = quantity x price per tonne + delivery fees; volume = quantity / density
Marine results are planning estimates only. Verify against the vessel's approved stability booklet, loading manual, class society rules and applicable maritime regulations before loading or sailing.
Because volume is measured on delivery and converted to mass. An incorrect density or temperature correction moves the invoiced quantity by tonnes.
When the mass actually received is less than invoiced, usually detected by comparing tank soundings with the bunker delivery note figures.