Count days between dates, or work out an exact age.
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How to use Date Diff & Age
Open the Date Diff & Age tool.
Paste or type your date or timestamp into the input field.
The output updates as you type. Adjust the options if you need a different format.
Copy the result, or share the URL to hand the exact input to someone else.
About Date Diff & Age
Measure the span between two dates. Get the exact years-months-days breakdown plus totals in days, weeks and hours, handy for ages, durations and deadlines. Swap the dates or jump 'to' to today with one click.
What people use it for
Calculate someone's exact age in years, months and days.
Count the days or weeks until a deadline.
Measure the duration between two events.
Frequently asked questions
What does it output?
An exact Y/M/D span and totals in days, weeks and hours.
Is it private?
Every calculation happens on this page, in your own browser. Your input is never sent to a server and never logged, which also means the tool keeps working when you are offline.