Our free age calculator computes your exact age from your date of birth — showing your age in years, months, weeks, days, and total hours. You can also calculate your age at any specific date in the past or future, and find out exactly how many days remain until your next birthday.
Beyond just knowing how old you are, the age calculator is a practical tool for legal and administrative purposes — such as verifying minimum age requirements, calculating retirement eligibility dates, or determining milestone ages for financial planning in the USA and Canada.
🎂 Age Calculator
🎂 Age Details
How to Use the Age Calculator
Calculating your age takes just seconds:
- Enter your date of birth using the date picker.
- Optionally, enter a specific target date — leave blank to calculate age as of today.
- Click Calculate Age to see your exact age in all units and your next birthday countdown.
When Should You Use an Age Calculator?
Use the age calculator whenever you need to know someone’s precise age — not just the year, but the exact months and days. In particular, this is useful for legal documents, medical records, insurance applications, and passport or visa applications that require an exact age or date of birth verification.
Furthermore, the age calculator is helpful for tracking milestone ages — such as when someone turns 65 (Medicare eligibility in the USA), 59½ (penalty-free retirement account withdrawals), or 18/21 (legal age thresholds). Additionally, parents often use it to calculate their child’s exact age for school enrollment cutoffs.
Age and Important Milestones in the USA and Canada
Here are important age-related milestones to be aware of:
- Age 18: Legal adult in most US states and all Canadian provinces. Eligible to vote in both countries.
- Age 19: Legal drinking age in most Canadian provinces (BC, Alberta, Manitoba — 18; all others — 19).
- Age 21: Legal drinking age in the USA.
- Age 59½: Penalty-free withdrawals from US retirement accounts (401k, IRA).
- Age 65: Medicare eligibility in the USA. Canada Pension Plan (CPP) standard eligibility age.
Frequently Asked Questions About the Age Calculator
How do I calculate my exact age?
Your exact age is the time elapsed from your date of birth to today, measured in years, months, and days. Our calculator accounts for leap years and varying month lengths to give you a precise result.
Can I calculate someone’s age on a specific past date?
Yes. Enter the person’s date of birth and then enter the target date in the Age At Date field. The calculator will compute their exact age on that specific date.
Related Calculators
Furthermore, you might find these related tools useful: Date Calculator — Time Calculator — Retirement Calculator