Date Difference Calculator
Count the years, months, days and working days between two dates.
Age Calculator
Type a date of birth and get the exact age, plus a countdown to the next birthday.
Your files stay with you. Your files never leave your browser. This tool runs on your device: nothing is uploaded to our servers, so there is nothing for us to store or see.
How to use it
- Choose the date of birth.
- Leave 'Age on' as today, or pick another date to see the age then.
- Read the age, totals and next birthday.
Questions people ask
How is the age worked out?
The tool counts full years from the birth date, then full months, then the days left over, using the real length of each month. For example 15 May 1990 to 10 March 2025 is 34 years, 9 months and 23 days.
What happens if I was born on 29 February?
In years that are not leap years the birthday is counted on 1 March, so the countdown never lands on a date that does not exist.
Can I find the age on a past or future date?
Yes. Change the 'Age on' date to, for example, a school admission cut-off or an exam date to see the age on that day.
Is my date of birth stored?
No. The calculation runs in your browser and nothing is sent to a server.
Want this inside your own account?
Marketiism keeps your invoice numbers, GST reports, UPI payment links and WhatsApp reminders in one place. Leave your details and we'll call to set it up for your business, or start the trial yourself.
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