Enter your date of birth
Choose your exact DOB from the first date field.
Calculators
Age Calculator by Date of Birth
Use this age calculator to calculate your exact age from date of birth in years, months, days, weeks, and total days. You can also check age on a custom date.
Category
Calculators
This tool uses a dedicated calculator-style interface for numeric input, instant output, and result breakdowns.
Date of birth calculator
Calculate age by date of birth
Enter your date of birth and choose the reference date to get exact age in years, months, and days.
Age summary
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Enter DOB to calculate
How to use this calculator
Select reference date
Use today or choose any custom date for age calculation.
Review exact age details
Check years, months, days, totals, and birthday countdown.
Why users choose this tool
Calendar-accurate results
Age is calculated using month and day boundaries, not rough yearly estimation.
Useful for official records
Helpful for school forms, applications, onboarding records, and verification tasks.
Custom-date flexibility
Calculate age for past or future reference dates whenever planning is needed.
What is an Age Calculator?
An age calculator calculates the time between a date of birth and a selected date. It shows age in years, months, days, and other useful formats.
Why use this tool?
Use it for forms, school records, job applications, birthday planning, official documents, and personal date calculations.
Common use cases
- Calculate exact age
- Age from date of birth
- Birthday countdown
- Age on a specific date
- School or job form age checking
Related tools
FAQ
Frequently asked questions
How is exact age calculated?
Exact age is calculated by comparing the date of birth with the selected reference date.
Can I calculate age on a future date?
Yes, you can choose a custom future date for age projection.
Does it show total days?
Yes, this tool provides total days, weeks, months, and years when supported by the selected dates.
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