Age Calculator by Date of Birth (DOB)

Use this simple age calculator to work out a person’s age from their date of birth as at a chosen date. This tool is designed for general information only and must not be relied on for legal, financial, immigration, licensing, age-restricted services, or any other critical decisions.

1. Age Calculator

Enter a date of birth and an “as at” date to estimate age in years, months and days.

2. How This Age Calculator Works

This calculator subtracts the date of birth from the selected “as at” date and then adjusts for months and days to produce an estimated age in years, months and days. It also estimates the total number of days between the two dates.

• It uses your device’s local date settings at the time you use the page.
• Leap years and different month lengths are taken into account in an approximate way.
• Results may differ slightly from official or legal age calculations.

Because date calculations can vary between organisations and systems, you should always double-check age calculations directly with the relevant official body if accuracy is important.

3. Important Limitations & Disclaimer

Key points:

• This age calculator is for general information and educational use only.
• It does not provide legal, financial, immigration, employment, health, insurance, pension, licensing or professional advice of any kind.
• It must not be used as a final or official source to prove identity, confirm age, or determine eligibility for government payments, pensions, visas, study, work, benefits, age-restricted products, or other services.
• The results may be incomplete, approximate or incorrect due to time zones, daylight saving changes, leap years, data entry errors or technical issues.
• For any important decision or official requirement, always check age and eligibility directly with the relevant government department, organisation, school, employer, insurer or service provider.
• This page does not replace official identity documents (such as passports, birth certificates or driver licences) and must not be used to bypass any age-verification process.

By using this page, you accept that you are responsible for how you use the information and that you must verify all important details independently with official sources.

4. Age-Related Information Resources

For accurate and up-to-date information about age requirements, benefits and legal rules, always rely on official sources. The links below are examples of where to start. Check your own country’s government and local authorities directly.

• Services Australia – Government payments, pensions and benefits (Australia)
• Social Security Administration (USA) – Benefits and retirement information
• GOV.UK – UK government services and information (including age-related rules)
• Government of Canada – Benefits, pensions and age-related programs

External websites may change, move or update their content at any time. Always confirm that you are on the latest official page and read any notices or disclaimers shown there.