Step-by-step instructions
Useful for forms, eligibility checks, planning birthdays and quickly understanding the elapsed age between a birth date and the calculation date.
Enter the date of birth
Choose the correct day, month and year. Double-check the date format if you are working from an international document.
Choose the calculation date
Use today’s date or another date when you need to calculate age at a specific point in time.
Calculate
Run the calculator to produce the age result.
Read the detailed result
Check the years, months and days shown. For boundary cases around birthdays, verify the dates carefully.
Use the result in context
Copy the result or use it as a quick reference. For official eligibility or legal decisions, confirm the applicable rules with the relevant authority.
Practical tips
- Enter the correct calendar date; a one-day error changes the result.
- For official forms, follow the date format requested by the organization.
- Age-based legal eligibility can depend on jurisdiction-specific rules beyond a simple date calculation.
Frequently asked questions
Does the calculator use the current date?
It can calculate from the supplied date of birth against the calculation date used by the tool.
Can I calculate age on a past or future date?
Use the date controls provided by the calculator when you need an age at a specific date.
Is the result suitable for legal eligibility?
It is a date calculation. Official eligibility can depend on laws and definitions that should be checked separately.