Age & Date Calculator
Work out an exact age, count the days between two dates, add or subtract days, weeks or months, and count working days. Answers in years, months and days, plus totals.
What “calculated on your device” means for this tool
When you open this page, your browser downloads the calculator itself, the same way any web page loads. From then on, every calculation happens inside your browser, on your own device. The dates you enter, including birthdays, are never sent to this website's server or to anyone else.
What is saved: nothing. Dates are forgotten when you close the page.
Visit counting: this site counts visits with privacy-friendly analytics. No cookies, no ads, no tracking across other sites, and your IP address is not stored. It records which page you opened, your country, your device type and how long you stayed.
How to use the Age & Date Calculator
- Choose Age, Days between, or Add or subtract.
- Pick the dates (Today is one tap away).
- Read the answer at the top, in years, months and days.
- See totals in weeks, days and hours, and working days, underneath.
Questions
How do I calculate my exact age?
Enter your date of birth. You get your age in years, months and days, plus your total days alive, the day of the week you were born and how long until your next birthday.
How many days are between two dates?
Open Days between and pick both dates. The count does not include the end date unless you tick “Count the end date too”, which is how deadlines are often counted.
How are working days counted?
Monday to Friday are counted and weekends skipped. Tick “Skip US federal holidays” to also leave out holidays such as Thanksgiving and Christmas, including the Friday or Monday they are observed on.
What is 30 days from today?
Open Add or subtract, leave the start on Today and add 30 days. You can add years, months and weeks too, or count only working days.
What happens when adding a month to January 31?
You get the last day of February, the same way banks and spreadsheets handle month ends.
Popular uses: Age Calculator · Days Between Dates
Still stuck, or want a tool that isn't here? Ask on the Nebula Discord.