Free tools
Speed and consumption calculator
See how a change in speed affects daily consumption, voyage time and total voyage fuel. Based on the cube law, with an adjustable exponent.
Consumption at different speeds
| Speed (kn) | mt/day | Days | Voyage fuel (mt) |
|---|
The cube law is an approximation. Real consumption also depends on draught, trim, hull and propeller condition, weather and engine load limits. Check slow steaming against your engine maker's guidance.
Estimates for planning only. Always confirm figures with your technical team, voyage instructions and the Bunker Delivery Note.
Free tools
Bunker and voyage calculators
Sea distance calculator
Distance in nautical miles between 37 major bunkering ports, with sailing time and a route map.
Open calculator →Voyage bunker calculator
How much fuel a voyage needs and how much to bunker, after sea margin and remaining on board.
Open calculator →CO2 and EU ETS calculator
CO2 from the fuel you burn and the EU ETS allowances to surrender, by voyage type and year.
Open calculator →Bunker unit converter
Convert fuel between tonnes, cubic metres and barrels with density and temperature, and convert prices.
Open calculator →Buy bunkers like a large fleet
Atlas Bunkering pools stems across fleets and passes on the rate we secure. The supplier invoices you directly.