Exact age
See age in years, months and days, not just a rounded number of years.
🎂
Age Calculator by Birthdate
Find your exact age in years, months, and days from a birthdate — free and instant.
🔒 Enterprise privacy — 100% client-side, no server uploads
What is Age Calculator by Birthdate?
Age Calculator by Birthdate is a free online tool that lets you find your exact age in years, months, and days from a birthdate — free and instant. Enter your text or numbers and see the result instantly. Everything you type stays in your browser.
Also searched as: calculate my age, age from date of birth, exact age calculator, how old am I.
Age Calculator by Birthdate at a glance
- Price
- Free, with no paid plans
- Account
- No signup or login needed
- Where it runs
- In your web browser
- Your data
- Nothing you type is sent to a server
- Works on
- Any modern browser, on desktop and mobile
- Category
- Developer & Everyday Calculators
When to use Age Calculator by Birthdate
- →Find exact age in years, months and days
- →Check age for a form or eligibility
- →Work out someone's age on a certain date
How to use Age Calculator by Birthdate
- 1
Open Age Calculator and fill in the values it asks for.
- 2
The result appears and updates instantly as you change any field.
- 3
Copy the result if you need to paste it elsewhere.
Why use Age Calculator by Birthdate
- ✓Runs entirely in your browser — your file is never uploaded to a server.
- ✓No account, signup, or email address required to use it.
- ✓Completely free, with no daily limit and no signup.
- ✓Gives an instant, accurate result without opening a spreadsheet.
Age Calculator by Birthdate
Find your exact age in years, months and days
Enter a date of birth to see the exact age, the total number of days lived and how many days remain until the next birthday.
Total days lived
The tool also shows how many days have passed since the date of birth.
Next birthday countdown
You are told how many days are left until the next birthday, or that it is today.
Private
Your date of birth stays in your browser.
Any device
Check an age on a phone, tablet or computer.
Free, no signup
No account and no limit.
Everything you need in Age Calculator by Birthdate
- Age in years, months and days
- Total days lived
- Days until the next birthday
- Checks for future dates
- Uses today's date
- Runs in your browser
- Works on phone and computer
- Free and no signup
Tips for better results
- 1
Pick the date from the calendar
Use the date field so the day, month and year are in the right order for your region.
- 2
Leap-year birthdays are handled
A birthday on 29 February still gives a sensible age.
- 3
Planning ahead?
To count days between two dates that are not a birthday, use Days Between Dates.
0files uploaded
0signups needed
0cost to use
Tutorials on Age Calculator by Birthdate
Short, practical guides that go with this tool.
🔒 Your privacy with Age Calculator by Birthdate
Age Calculator runs as client-side JavaScript inside your own browser tab. Your file or text is read, processed, and turned into a result on your device — it is never sent to, stored on, or seen by Toolkitties' servers. Closing or refreshing the page clears everything.
Frequently asked questions
How is the age worked out?
It counts full years, then months, then days from the date of birth to today.
Does it show how many days old I am?
Yes. It shows the total number of days lived.
Does it tell me when my next birthday is?
Yes. It shows how many days are left until your next birthday.
What if I enter a date in the future?
The tool asks you to enter a past date of birth.
Is my date of birth stored?
No. It is used in your browser only.
Can I find the age on a specific date?
The tool uses today's date. For the gap between two dates, use Days Between Dates.
Is Age Calculator free to use?
Yes. Age Calculator is 100% free, with no signup, no daily limit and no paid plans.
Do I need to create an account to use Age Calculator?
No signup or login is required. Open the page and start using Age Calculator immediately.
Is it safe to use Age Calculator with private or sensitive files?
Yes. Age Calculator processes your file locally in your browser using client-side code. The file itself is never uploaded to Toolkitties' servers.