Age calculator - date difference
Calculate age or the difference between two dates in years, months and days.
Calculations are based on Estonia's tax rates in force for 2026. Results are informational.
Last updated: 2026-06-03
How to calculate age?
Enter the date of birth and an end date (today by default). The calculator shows the exact difference in years, months and days, plus totals in months, weeks and days.
How it is calculated
Formula
age = the difference in years, months and days between two dates (calendar-based). Total days, weeks and months are also computed.
Example
01.01.2000 → 01.07.2026 = 26 years 6 months, ≈ 9678 days in total.
Frequently asked questions
How is age calculated exactly?+
The calculator finds the difference in years, months and days between two dates, accounting for the varying length of months.
Can I calculate age in the future?+
Yes, pick a future comparison date and the calculator shows the age at that point.