Fermi question · Technology
About how many people worldwide used the Internet in 2025?
Make a fast, defensible estimate before you reveal the reference answer. Think in factors, not exact recall.
What is your estimate?
Your result will appear here after you submit a guess.
Reference answer
Reveal the reference answer
≈ 6 billion people
Fermi estimates are judged by scale, so a reasonable approximation can still earn a strong score.
One way to estimate it
Estimate global population multiplied by the share of people who are online.
- Population≈ 8.2 billion
- Connectivity≈ 74%
- Estimate8.2B × 0.74 ≈ 6.1B people
Keep practicing
Try another question, or return to the daily challenge to build your personal sense of scale.