age at death calculator

Enter a birth date and date of death to calculate exact age in years, months, and days.

Date of Birth

Date of Death

Time of Birth (optional)

Time of Death (optional)

If you provide both times, the calculator also shows total hours and minutes lived.

What this age at death calculator does

This calculator measures how long someone lived based on a known date of birth and date of death. It reports age in calendar terms (years, months, days), and it also provides total time lived in days and weeks. If both birth time and death time are entered, it adds hour and minute totals too.

It is useful for genealogy research, obituary writing, family records, memorial pages, and historical analysis. Instead of estimating with rough numbers, you get a clear and consistent answer instantly.

How the calculation works

1) Calendar age (years, months, days)

Calendar age is calculated by comparing the two dates directly. The calculator handles month lengths correctly, including leap years. For example, the difference between February 28 and March 1 is not always the same across different years, and the tool accounts for that.

2) Total days and weeks lived

After calculating the calendar age, the tool also computes the total number of days lived between the two dates. That value is then converted into weeks for an additional perspective.

3) Optional time-based precision

If both time fields are filled in, the calculator computes exact elapsed time in hours and minutes. This is especially useful in medical, legal, or historical timelines where partial days matter.

Why people use an age at death calculator

Genealogy: Build accurate family trees and historical profiles.
Obituaries: Confirm exact age details before publication.
Research: Analyze lifespan patterns across groups or eras.
Personal records: Keep precise family history for future generations.

Tips for accurate results

Use verified dates from official documents whenever possible.
If time is unknown, leave time fields blank for a date-based result.
Double-check month/day order when entering historical records.
For living individuals, use today as a temporary end date to see current age.

Important note

This tool calculates elapsed age only. It does not estimate life expectancy, predict lifespan, or provide medical guidance. If you are looking for life expectancy modeling, use a dedicated actuarial or healthcare forecasting tool.