Just how old are you?

Downloadable versions of this activity are available in the following formats:


How old are you?

How old are you

  • 15,000 days?
  • 80,000 hours?
  • 150 million seconds?

Write your age in years: (-----)

Guess your age in each different unit of time listed below, then work out the answer. You may need a calculator to help you.

Remember: 1 year = 12 months
1 year = 365 days
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds


How old you are in .? Your guess Your calculation

Try finding out other people’s ages in different units—your Dad, Grandma, dog, goldfish, for example.

  • How old is your oldest living relative?
  • How old is your youngest living relative?
  • What year were they born in?

Reproduced with permission from CensusAtSchool – U.K.

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