The best estimation questions

Guessing questions are a fun way to test the knowledge and intuition of friends, family or colleagues. Whether you’re organising a social gathering or just want to test your own sense of estimation, we’ve put together a comprehensive list of 40 estimation questions and their answers. Are you ready to show off your guessing skills?

Easy estimation questions:

1. How many years is the average lifespan of a domestic cat?
   Answer: About 15 years.
2. How many teeth does an adult human have on average?
   Answer: Between 28 and 32 teeth.
3. How many calories does an average banana contain?
   Answer: About 105 calories.
4. How many kilometres does an average car travel per year?
   Answer: About 15,000 kilometres.
5. How many letters are there in the Arabic alphabet?
   Answer: 28 letters.

Medium and difficult estimation questions: 

6. How many litres of water does an average person use per day?
   Answer: About 100 litres.
7. How many hours of sleep does an average adult get per night?
   Answer: About 7-8 hours.
8. How many calories floors does the Burj Khalifa, the tallest building in the world, have?
   Answer: 163.
9. How many football pitches can fit in the area of Monaco?
   Answer: About 5 football pitches.
10. How many people currently live on earth?
    Answer: About 7.9 billion people.
11. How many years does it take for a plastic bottle to completely disintegrate in the ocean?
    Answer: About 450 years.
12. How many years does it take for a ray of light to travel from the sun to the earth?
    Answer: About 8 minutes and 20 seconds.
13. How many kilometres does a train travel on an average train journey from New York to Los Angeles?
    Answer: About 4,000 kilometres.
14. How many eggs does an average hen lay per year?
    Answer: About 300 eggs.
15. How many people worldwide own a smartphone?
    Answer: About 3.8 billion people.

How about interactive rounds in between? These are the perfect way to lighten the mood of your fellow guessers! Like this one, for example:

Interactive estimation questions:

16. How many sweets are in this jar? (picture of the jar)
    Answer: (Varies depending on the jar and number of sweets)
17. How many gummy bears fit in a standard gummy bear bag?
    Answer: (Varies depending on the size of the bag and the size of the gummy bears)
18. How many M&Ms are in this jar? (Picture of the jar)
    Answer: (Varies depending on the jar and the number of M&Ms)
19. How many pebbles are in this jar? (picture of the jar)
    Answer: (Varies depending on the jar and the size of the pebbles)
20. How many balloons fit in an average room?
    Answer: (Varies depending on the size of the room and the size of the balloons)

Fun estimation questions:

21. How many hotdogs can you eat in 10 minutes?
    Answer: The record is 76 hot dogs
22. How long is the average queue at a supermarket checkout?
    Answer: About 7 minutes.
23. How tall was Alexander the Great?
    Answer: 1.50 metres
24. How many rooms does the White House have?
    Answer: 132 rooms
25. How many feathers does an adult turkey have?
    Answer: About 3,500 feathers.
26. How many grams does an average cloud weigh?
    Answer: About 1.1 million grams.

With these estimation questions and their answers, you’ll have plenty of material to test your estimation skills while having a fun time with friends, family or colleagues. Have fun guessing!