Life in Weeks
See your life measured in weeks: how many you've lived and how many a typical lifespan leaves.
About the Life in Weeks
Enter your date of birth and the lifespan you want to plan around. The calculator counts the weeks you've lived, the weeks left, roughly how many summers and weekends remain, and draws your life as a grid of weeks.
A 90-year life is only about 4,700 weeks. Seeing life in weeks, an idea popularised by Tim Urban's “Your Life in Weeks” chart, makes time feel concrete. Change the expected lifespan to suit you; it isn't a prediction.
The formula
Weeks lived = ⌊(today − birth) ÷ 7 days⌋; total = lifespan × 365.2425 ÷ 7
Worked example
Born 15 June 1990, on 11 November 2026, planning on 80 years
- Weeks lived: 1,899 of about 4,174
- 45.5% of the way through
- About 2,275 weeks (43.6 years) to go
Questions people ask
How many weeks are in 80 years?
About 4,174.
Is this a life expectancy prediction?
No; use the life expectancy calculator for an estimate based on country and sex.
Why is my number different from other sites?
Some count 52 weeks a year exactly; this uses the true average year of 365.2425 days.