Cube Law Fuel Ratio
Quick ratio of main-engine fuel at two speeds using V^n scaling. Screened separately from the voyage-slow-steaming page for one-liner use.
Fuel ratio (new / ref)
0.512×
ME fuel saving
48.8%
Formula, assumptions, and limits
Aux fuel doesn't scale with V^n - net voyage saving is smaller than this ratio suggests. See the slow-steaming calculator for voyage-level arithmetic.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Speeds | kn | operating plan | |
| Speed exponent (3 default) | - | empirical | |
| New-to-ref fuel fraction | - | result |