1QUESTION 1 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
2,000,000,000
British pounds
How to estimate it
Fermi’s official “Napkin math”
How much does dogfood cost? A bag every month or so, maybe £150 a year. The population of the UK is around 70 million. How many people own a dog? Maybe 1 in 5 people, which is about 14 million dogs. Now just add it up.
- UK population
- 70,000,000
- One dog per 5 people
- ÷ 5 ≈ 14,000,000
- Food per dog per year
- × £150
- 14M × £150
- ≈ £2,100,000,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Dogs in UK households, 2026 (UK Pet Food)
- 15,500,000
- UK dog food market (UK Pet Food manifesto)
- ≈ £2bn
- Per dog
- ≈ £130 a year
- ≈
- £2,000,000,000
Reference cited by Fermi: UK Pet Food (trade body formerly PFMA) market data and manifesto
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.