EVERYDAY / DATES

Life in weeks

See how many weeks you have lived and how many may remain under a lifespan you choose.

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YOUR RESULT

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WORKED EXAMPLE

Life in weeks: a worked example

With date of birth 1990-01-01, calculate as of 2026-01-01, expected lifespan (years) 80, the weeks lived is 1,878.

Inputs
Date of birth1990-01-01
Calculate as of2026-01-01
Expected lifespan (years)80
Results
Weeks lived1,878
Share of expected lifespan45%
Weeks remaining (estimate)2,296
Years remaining (estimate)44 years

Amounts are shown in US dollars for illustration. Choose your own currency in the calculator above; it labels amounts and does not convert them.

THE METHOD

How it works

Enter a birth date and an expected lifespan. The lifespan is only an assumption to put time in perspective; it is not a prediction for any person.

FormulaWeeks lived = ⌊days since birth ÷ 7⌋; weeks remaining = lifespan × 365.25 ÷ 7 − weeks lived.
WHY IT MATTERS

Make the numbers useful

Try changing one input at a time. The live result helps you see which assumption has the greatest effect.

Use Save scenario A, change an input, and compare both results side-by-side. You can also share your settings using a link.

Modelled results are estimates. Independently check decisions involving health, finances or safety.
QUESTIONS

Frequently asked questions

How is the life in weeks calculated?

Weeks lived = ⌊days since birth ÷ 7⌋; weeks remaining = lifespan × 365.25 ÷ 7 − weeks lived. Enter a birth date and an expected lifespan. The lifespan is only an assumption to put time in perspective; it is not a prediction for any person.

What does the life in weeks example show?

With date of birth 1990-01-01, calculate as of 2026-01-01, expected lifespan (years) 80, the weeks lived is 1,878. Share of expected lifespan: 45%; Weeks remaining (estimate): 2,296; Years remaining (estimate): 44 years.

What assumptions and limits apply?

This is an estimate based on the inputs and assumptions shown on this page, not professional advice. Check anything with financial, health or safety consequences independently.

Is my data private?

Yes. Calculations run in your browser and your numbers are not sent to a server. A share link contains the inputs you choose to share, so check it before sending it to anyone.

FOR WEBSITE OWNERS

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