Boat Fuel Calculator
Planning a boat trip requires knowing how much fuel you’ll need. Our fuel calculator helps you estimate consumption for any voyage by combining distance, speed, and your vessel’s burn rate. Whether you’re cruising on a yacht or running a charter, get accurate numbers to plan your trip.
How to Calculate Fuel Consumption
Set Your Route
Click the map or search ports to define departure and destination
Enter Speed & Consumption
Set cruising speed in knots and fuel burn rate per hour
Get Your Estimate
See total fuel needed in liters or gallons — plus trip cost
The formula is simple: calculate travel time from distance and speed, then multiply by consumption rate per hour. A 200 nautical mile trip at 20 knots takes 10 hours. At 30 L/hr, you’ll need 300 liters.
Pro Tip: Always add 10-20% reserve to your estimate for unexpected conditions or detours.
Typical Fuel Consumption Per Boat Type
| Boat Type | L/hr | GPH | Speed |
|---|---|---|---|
| Small Outboard (50hp) | 8-15 | 2-4 | 15-25 kt |
| Center Console (200hp) | 30-50 | 8-13 | 25-35 kt |
| Cabin Cruiser | 60-100 | 16-26 | 20-30 kt |
| Motor Yacht (50ft+) | 100-200 | 26-53 | 12-20 kt |
Your yacht or boat may differ based on engine type and hull efficiency. Use your actual consumption rate per hour for the most accurate estimate. If you don’t know your burn rate, start with a typical value and adjust based on experience.
Factors That Affect Fuel Cost
Actual consumption can vary from estimates. Key factors include:
- Speed — reducing cruising speed by 10% can save 20% on fuel
- Load — more passengers means higher consumption per hour
- Sea conditions — waves and headwinds increase burn rate
- Hull condition — fouled bottoms create drag and waste fuel
Frequently Asked Questions
How do I find my boat’s fuel consumption?
Check your engine manual for GPH or L/hr at cruising speed. You can also calculate it by tracking fuel used over a known distance.
How accurate is this fuel calculator?
Very accurate for planning. The estimate assumes constant speed and consumption. Real conditions vary, so carry reserve fuel.
What’s the difference between GPH and L/hr?
GPH is gallons per hour (US), L/hr is liters per hour (metric). Select your preferred unit — price adjusts automatically.
Should I calculate fuel for the round trip?
Yes! Add your return journey as waypoints to see total consumption for the complete trip. Don’t forget reserve fuel.
This calculator provides estimates for trip planning. Always carry appropriate reserves for safe boating.