Input
- Enter the date of birth and the desired deadline.
Work & Time
Age calculator
You enter your date of birth and key date. The calculator shows the exact age and the entire time period.
Back to category: Work & Time
Calculator
Calculation path
Step by step
-
birth date
Result: Jun 14, 1990
-
deadline
Result: Apr 21, 2026
-
Determine age
Formula: Calendar difference between both dates
Result: 35 years, 10 months, 7 days
-
Total duration in days
Result: 13,095 days
Instructions
How to use this calculator correctly
Read the result
- The calculator displays the age in years, months and days.
- You will also see the total duration in days.
Use cases
- Helpful for applications, anniversaries, deadlines or simply for quick orientation.
Related guide: Working time, hours and industrial minutes in everyday life
Examples
Typical calculations
Adult person
Old: 35 years, 10 months, 7 days
Load this examplechild
Old: 7 years, 5 months, 18 days
Load this exampleRound birthday
Old: 40 years, 0 months, 0 days
Load this exampleFAQ
Frequently asked questions
Does the calculator take leap years into account?
Yes. The calendar difference takes real months and leap years into account.
Can I also enter a future date?
No. The key date must be on or after the date of birth.
Why does the calculator show years, months and days?
This makes the age more accurate and easier to understand than just using decimal values.
Is this suitable for authorities?
For deadlines and legal questions, the respective official date always counts.
Can I also use this for anniversaries?
Yes. The calculator is also suitable for round birthdays and anniversary dates.
Related calculators
Continue seamlessly
Days Between Dates Calculator
Calculate calendar days between two dates.
Working days calculator
Calculate working days between two dates with state and holidays.
Pregnancy week calculator
Calculate week of pregnancy and expected date of birth according to the standard model.
Sources and notes
Rule status and context
- Calculation
- Calendar-exact difference between date of birth and key date.