Age Calculator
Calculate exact age in years, months and days from a date of birth.
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How to use the Age Calculator
- Open the Age Calculator.
- Enter your input in the fields provided - results update as you type where practical.
- Use Copy or Download to take the result with you, or Reset to start again.
How it works
Counts full years, then full months, then remaining days, handling month lengths and leap years. Future dates are rejected with an explanation.
Privacy note: this tool runs locally in your browser. Your input is not uploaded, stored in analytics, or placed in the page URL.
Frequently asked questions
Is the Age Calculator free?
Yes. It is completely free, needs no account, and runs in your browser.
Is my data uploaded when I use the Age Calculator?
No. Processing happens locally on your device. We do not upload your inputs, files or generated passwords.
How does the Age Calculator work?
Counts full years, then full months, then remaining days, handling month lengths and leap years. Future dates are rejected with an explanation.