Calculators
Age calculator
Calculate exact age in years, months, and days, and days until the next birthday.
Free to use · Runs in your browser · No signup
This tool works in your browser. Enable JavaScript to select files and create your download.
How to use Age calculator
- Enter a date of birth.
- Change the “age on” date to calculate age at another date.
- Read the exact age, totals in days and weeks, and the next birthday.
What you need
Nothing to upload. Type or paste directly into the tool; results update as you go.
Your result
Exact age and days until the next birthday.
Before you start
Leap-day birthdays are counted on 28 February in non-leap years. Dates are compared as calendar days.
Questions about Age calculator
How do I use Age calculator?
Enter a date of birth. Change the “age on” date to calculate age at another date. Read the exact age, totals in days and weeks, and the next birthday.
What does Age calculator produce?
Exact age and days until the next birthday.
What should I check before using Age calculator?
Leap-day birthdays are counted on 28 February in non-leap years. Dates are compared as calendar days.
Is what I type sent anywhere?
No. The calculation runs in your browser, and the text or numbers you enter are not uploaded or stored.