How Much Fuel Does a Yacht Use? Yacht Fuel Cost Guide
Yacht fuel cost depends on fuel burn, cruising speed, engine hours and diesel price. Use real test data and simple formulas to estimate your budget.
Updated: October 12, 2026
Yacht fuel cost can range from a few thousand dollars per year for a lightly used, slow-cruising boat to well over $50,000 for a larger planing motor yacht. The useful calculation is not based on length alone. It combines the yacht's actual fuel burn, annual engine hours and the price paid per gallon.
Published BoatTEST results show why the range is so wide. A 40-foot-class power catamaran burned 28 gallons per hour at 21.4 knots, while a Monte Carlo Yachts 70 burned 97.7 gallons per hour at 21 knots. The same 70-footer used only 11.5 gallons per hour at 9.4 knots. Speed and hull design can matter as much as size.
Yacht Fuel Cost: Quick Answer
For a simple annual estimate, multiply combined fuel consumption by engine hours and your local diesel price:
Gallons per hour × annual engine hours × price per gallon = annual propulsion fuel cost
| Average fuel burn | 100 hours at $4/gal | 100 hours at $5/gal | 100 hours at $6/gal |
|---|---|---|---|
| 10 GPH | $4,000 | $5,000 | $6,000 |
| 30 GPH | $12,000 | $15,000 | $18,000 |
| 50 GPH | $20,000 | $25,000 | $30,000 |
| 90 GPH | $36,000 | $45,000 | $54,000 |
| 130 GPH | $52,000 | $65,000 | $78,000 |
This table covers propulsion fuel only. Generator use, extended idling, tenders, fuel delivery fees and taxes can increase the real total.
Fuel Cost Examples by Yacht Length
These are test points for specific yachts, not averages for every boat of that length. Costs use an illustrative $5 per US gallon and hold the tested burn constant for 100 propulsion hours. Replace the fuel price and hours with your own figures; add generator and tender fuel separately.
| Tested yacht | Test speed | Combined fuel burn | Fuel cost per hour | 100-hour example |
|---|---|---|---|---|
| Absolute 50 Fly (49 ft 10 in LOA) | 24.7 knots | 38.4 US gal/hr | $192 | $19,200 |
| Fleming 60 (62 ft 9 in LOA) | 8.3 knots | 8 US gal/hr | $40 | $4,000 |
| Fleming 60 (62 ft 9 in LOA) | 15.2 knots | 54 US gal/hr | $270 | $27,000 |
| Monte Carlo Yachts 70 | 16.6 knots | 67.4 US gal/hr | $337 | $33,700 |
| Fleming 78 (near-80-foot example) | 8.7 knots | 13 US gal/hr | $65 | $6,500 |
| Fleming 78 (near-80-foot example) | 16.9 knots | 112.8 US gal/hr | $564 | $56,400 |
The Fleming 78 is 78 feet, not an exact 80-foot yacht. These examples show why length alone cannot provide a reliable fuel estimate: the tested 60-foot Fleming burned 8 gal/hr at 8.3 knots and 54 gal/hr at 15.2 knots. Check the performance data for the exact model, engine package and intended speed.
Hourly, Annual and Tank Fill Costs: Three Different Calculations
| Question | Calculation | Illustrative result |
|---|---|---|
| What does one cruising hour cost? | 50 US gal/hour × $5/US gal | $250/hour |
| What does a 100-hour season cost? | 50 US gal/hour × 100 hours × $5/US gal | $25,000 propulsion fuel |
| What does a 600-gallon top-up cost? | 600 US gal added × $5/US gal | $3,000 at the pump |
These are arithmetic examples, not current fuel prices or average consumption. A fill-up uses the amount actually added, which can be less than tank capacity. Fuel carried onboard is not the same as fuel consumed during the year.
How Much Does It Cost to Fill Up a Yacht?
Multiply the volume you need to add by the delivered marine-fuel price. For example, adding 2,000 litres at an illustrative $1.50 per litre costs $3,000. Include taxes or delivery charges if they are not already in the quoted pump price. Ask the fuel dock for its current price and available quantity before arriving.
Check Units and Engine Count Before Calculating
Use litres per hour with price per litre, or US gallons per hour with price per US gallon. Do not mix the two. If consumption is stated per engine, add the engines together; if it is already a combined figure, do not double it. For two engines each burning 25 US gallons per hour, combined burn is 50 US gallons per hour.
If your cruising schedule includes several speeds, calculate each segment separately and add the costs. A flat hourly average can hide the difference between slow cruising and fast passages. Add generator and tender fuel separately.
Use the fuel section of our Yacht Annual Cost Calculator to enter annual hours, combined fuel burn and price. It supports litres and US gallons and can include generator and tender fuel alongside the rest of your ownership budget.
Worked Fuel Budget: Different Speeds and Generator Use
If you cruise at more than one speed, calculate each part of the season separately. Use combined consumption for all propulsion engines, then add generator fuel. The figures below are illustrative assumptions, not average yacht consumption or current fuel prices.
| Use | Hours | Combined burn | Fuel used | Cost at $5/US gal |
|---|---|---|---|---|
| Slow cruising | 40 | 12 US gal/hour | 480 US gal | $2,400 |
| Faster cruising | 60 | 50 US gal/hour | 3,000 US gal | $15,000 |
| Generator | 200 | 1 US gal/hour | 200 US gal | $1,000 |
| Total | 100 propulsion hours + 200 generator hours | Calculated by segment | 3,680 US gal | $18,400 |
The propulsion-only average is 3,480 / 100 = 34.8 US gallons per hour. In the annual yacht cost calculator, enter 100 propulsion hours and 34.8 US gallons per hour, then include the generator separately. Generator hours can overlap with cruising hours: they are not extra propulsion hours.
At $6 per US gallon, the same fuel volume would cost $22,080, an increase of $3,680. Add tender fuel and charges that are not already included in the quoted fuel price. This example estimates spending; it does not establish safe passage range or the fuel reserve needed onboard.
Real-World Yacht Fuel Consumption Examples
The figures below come from instrumented BoatTEST performance data. They are examples rather than universal averages: loading, bottom condition, weather, engines, propellers and optional equipment all affect results.
| Tested yacht | Test speed | Combined burn | Fuel cost per hour at $5/gal |
|---|---|---|---|
| Fountaine Pajot MY4.S | 21.4 knots | 28.0 GPH | $140 |
| Prestige 520 | 18.8 knots | 30.7 GPH | $153.50 |
| Prestige 550 Flybridge | 22.4 knots | 41.2 GPH | $206 |
| Prestige 620 | 17.7 knots | 39.4 GPH | $197 |
| Monte Carlo Yachts 70 | 16.6 knots | 67.4 GPH | $337 |
| Prestige 750 | 19.2 knots | 61.6 GPH | $308 |
These examples also show why a length-based estimate is only a starting point. The 62-foot Prestige test boat consumed less at its published best-cruise point than the smaller Prestige 550 did at a faster cruise. Hull efficiency, speed and propulsion choices can outweigh a simple difference in length.
Why Cruising Speed Changes the Fuel Bill
A yacht moving slowly in displacement mode generally requires far less power than the same yacht running on plane. The Monte Carlo Yachts 70 test provides a clear example:
| Speed | Fuel burn | Hourly cost at $5/gal |
|---|---|---|
| 9.4 knots | 11.5 GPH | $57.50 |
| 16.6 knots | 67.4 GPH | $337 |
| 21.0 knots | 97.7 GPH | $488.50 |
| 25.9 knots | 134.1 GPH | $670.50 |
Going from 9.4 to 21 knots more than doubled the speed but increased hourly fuel burn by roughly eight and a half times in this test. That does not mean the slowest possible speed is always best for every engine or trip. It does mean that owners should compare gallons per hour and nautical miles per gallon across the manufacturer's performance curve before choosing a normal cruise setting.
How to Calculate Fuel Cost for a Trip
If you know speed and gallons per hour, estimate trip time first:
- Trip time: nautical miles ÷ cruising speed in knots
- Fuel used: trip time × gallons per hour
- Trip fuel cost: fuel used × price per gallon
Example: a 150-nautical-mile passage
Assume a yacht cruises at 20 knots and burns 50 gallons per hour:
- 150 nautical miles ÷ 20 knots = 7.5 running hours
- 7.5 hours × 50 GPH = 375 gallons
- 375 gallons × $5 = $1,875
A real passage plan should include a prudent fuel reserve and account for weather, currents, detours, warm-up, maneuvering and generator use. Do not treat a spreadsheet estimate as a safe range calculation.
How Many Engine Hours Does a Yacht Run Per Year?
Annual engine hours depend on how the yacht is used. An owner making short weekend trips may record relatively few propulsion hours, while a yacht cruising between regions or operating a busy charter program can accumulate several times as many. Use the yacht's service records or a realistic itinerary instead of assuming that every owner runs 100 hours.
| Average burn | 50 hours at $5/gal | 100 hours at $5/gal | 200 hours at $5/gal |
|---|---|---|---|
| 20 GPH | $5,000 | $10,000 | $20,000 |
| 40 GPH | $10,000 | $20,000 | $40,000 |
| 70 GPH | $17,500 | $35,000 | $70,000 |
| 100 GPH | $25,000 | $50,000 | $100,000 |
What Else Belongs in a Yacht Fuel Budget?
- Generator fuel: air conditioning, refrigeration, cooking and hotel loads can continue when the main engines are off.
- Idle and maneuvering time: marina approaches, warm-up and waiting time still consume fuel.
- Tender and water-toy fuel: these may be small individually but add up during frequent use.
- Delivery charges and taxes: the dock price can differ materially from road diesel or a headline regional average.
- Fuel treatment and filters: long storage periods and contaminated fuel can create additional service costs.
- Reserve: passage planning requires more fuel onboard than the calculated point-to-point consumption.
How to Reduce Yacht Fuel Consumption
- Use the yacht's verified performance table to identify efficient operating points.
- Slow down when the itinerary and sea conditions allow it.
- Keep the hull, running gear and propellers clean.
- Maintain engines, injectors, filters and cooling systems on schedule.
- Avoid unnecessary weight and poor trim.
- Plan routes around adverse currents and severe weather where practical.
- Track actual gallons added, engine hours and distance after every trip.
The most useful improvement is accurate recordkeeping. A simple log of hours, gallons, speed and route will produce a better forecast for your yacht than a generic online average.
Fuel Cost in the Total Ownership Budget
Fuel is visible, but it is only one part of yacht ownership. Marina fees, insurance, scheduled service, repairs, haul-outs, cleaning and crew may exceed the fuel bill for a lightly used yacht. For complete budgets, see YachtMetric's 50-foot yacht cost guide, 60-foot yacht cost guide, 70-foot yacht cost guide and 80-foot yacht guide.
Bottom Line
To estimate yacht fuel cost, start with the combined fuel burn at the speed you actually expect to use. Multiply that figure by realistic annual engine hours and the delivered marine-diesel price in your cruising area. Then add generator use, maneuvering and a planning margin. For many motor yachts, changing cruising speed will influence the answer more than a small difference in length.
Build the next part of your yacht budget
- Budget for marina and storage charges
- Plan maintenance and repair reserves
- See all annual ownership expenses
Next step: record your own quotes and assumptions in the annual yacht cost calculator, then total the budget.
Frequently Asked Questions
How much fuel does a yacht use per hour?
There is no single average. BoatTEST examples in this guide range from 8 US gal/hr for a Fleming 60 at 8.3 knots to 134.1 US gal/hr for a Monte Carlo Yachts 70 at 25.9 knots. These are test points for specific yachts and conditions, not a typical range for every yacht.
How do I calculate annual yacht fuel cost?
Multiply average gallons per hour by annual engine hours and fuel price per gallon. A yacht averaging 50 GPH for 100 hours at $5 per gallon would use approximately $25,000 of propulsion fuel.
Does going slower save fuel on a yacht?
It often can, especially when a motor yacht operates efficiently at displacement speed rather than pushing onto plane. Always consult the performance data for the specific hull and engine package because efficiency does not change uniformly at every speed.
Is generator fuel included in gallons per hour?
Boat performance tables normally report the main propulsion engines. Generator consumption, tenders and extended idling should be added separately when estimating a complete fuel budget.
