Age Calculator
A fast online age calculator. Find your exact age in years, months, and days — or compute the days between any two dates. Runs in your browser, no signup.
Use this age calculator to work out exact age from a date of birth, days between two dates, or countdown to the next birthday. Results break down into years, months, days, and total weeks, hours, and minutes for fun.
Useful for forms that ask for exact age, eligibility checks, anniversary planning, and travel visa rules. Leap-year handling, timezone-friendly, and accurate to the day.
How to use the age calculator
Three steps for your answer.
1. Enter birth date
Pick your date of birth (or any start date).
2. Set end date
Defaults to today. Change it for any date range.
3. Read the breakdown
Years / months / days plus alternate units and countdown.
Different ways to view the same age
Pick the unit that fits what you need.
| Unit | When to use |
|---|---|
| Years, months, days | Birthday cards, profile info, the classic answer. |
| Total months | Child milestones, vesting periods, visas. |
| Total weeks | Pregnancy milestones, habit tracking. |
| Total days | Countdowns, anniversaries, quick comparisons. |
| Total hours / minutes | Birthday fun facts and novelty. |
Typical reasons to use the age calculator
Know your exact age
Down to the day, not just the year.
Plan an anniversary
Days until the next milestone from a date.
Age eligibility check
18+, retirement, scheme cutoffs.
Days between two dates
Between any two dates — not only birthdays.
Common pitfalls
Wrong timezone
Birthdays are date-based, not instant-based. Crossing timezones shouldn’t flip the day — pick the locale of birth.
Mixing ‘months’ and ‘4 weeks’
A month isn’t always 4 weeks. Use months for age, weeks for short intervals.
Age vs birthday logic
You ‘turn’ X on your birthday. Until then, you’re still X − 1 even if months are close.
Leap-day birthdays
Feb 29 birthdays usually celebrate on Feb 28 / Mar 1 in non-leap years. The tool reports calendar-accurate age either way.
What this tool supports
| Feature | Supported | Notes |
|---|---|---|
| Age in years, months, days | Yes | Calendar-accurate breakdown. |
| Total months / weeks / days | Yes | Different units for different needs. |
| Hours, minutes, seconds | Yes | Novelty granular breakdowns. |
| Days between two dates | Yes | Works for any date range, not only birthdays. |
| Upcoming birthday countdown | Yes | Shows days until your next birthday. |
| Leap year aware | Yes | Correct handling for Feb 29. |
| Account required | No | No signup, no install. |
Frequently Asked Questions
User reviews
No reviews yet. If you used the tool, you can share feedback on our feedback page.
Ready to check your exact age?
Pick a date of birth, read the full breakdown, and see when your next birthday lands.