Age Calculator Online — Calculate Age by Date of Birth
Find your exact age in years, months and days — plus totals in weeks, hours, minutes & seconds. Get your next birthday date & weekday with a live countdown. 100% private: everything runs in your browser.
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How to use Age Calculator
- Select your Date of Birth (optionally add time).
- Keep “Today” selected or choose a custom “As of” date.
- Click Calculate to see exact age & next birthday details.
- Use Date Difference to find the gap between any two dates.
What is an Age Calculator?
An Age Calculator is a free online tool to calculate age by date of birth with exact precision. It instantly shows years, months, days — plus totals in weeks, hours, minutes & seconds — and also gives your next birthday date, weekday and a live countdown. All calculations are browser-only for privacy.
Features of our Online Age Calculator
- Exact age in years, months, days + totals (weeks, hours, minutes & seconds).
- Next birthday date, weekday and live countdown.
- Zodiac sign based on your Date of Birth.
- Date Difference for any two dates.
- 100% private — nothing is uploaded, runs in your browser.
FAQ
Is this age calculator accurate?
Yes. It accounts for leap years and true month lengths. Times are computed in your local timezone for consistency.
Do you store my dates?
No. Everything runs in your browser; nothing is uploaded.
Can I calculate age with time?
Yes. Enable the “Time” checkbox next to Date of Birth to include hours and minutes.
Can I compare two dates?
Yes, use the Date Difference section to find the gap between any two dates.