Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
75,000
gallons
How to estimate it
Fermi’s official “Napkin math”
The easiest place to start is everyone on board, about 8,000 people with the crew. How much fuel is each person's share? Picture a long road trip in your car, every single day. Call it 10 gallons.
- People on board
- ~8,000
- Fuel per person, per day
- ~10 gal
- 8,000 × 10
- ≈ 80,000 gal
The easiest place to start is everyone on board, about 8,000 people with the crew. How much fuel is each person's share? Picture a long road trip in your car, every single day. Call it a full tank, 40 liters.
- People on board
- ~8,000
- Fuel per person, per day
- ~40 L
- 8,000 × 40
- ≈ 320,000 L
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Ships over 300 m at 85%+ load (Marine Insight)
- 235 to 250 tonnes a day
- 250 tonnes of marine fuel
- ≈ 73,000 gal
- Cross-check: Harmony of the Seas, reported
- 66,000 gal a day
- ≈
- 75,000 gallons (284,000 L)
Reference cited by Fermi: Marine Insight: ships over 300 meters burn 235 to 250 tonnes a day
How close was your guess?
Your comparison will appear here.
Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.