Date Difference Calculator
Calculate the number of days, weeks, or months between two dates.
Difference
Enter both dates above
Total days
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Total weeks
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Key features
Pick a start date and an end date to see exactly how much time is between them — in total days, weeks, and a calendar-accurate years/months/days breakdown.
Everything is calculated locally in your browser. Nothing you enter is stored or sent anywhere.
How to use
Pick a start date
The earlier date in the range you want to measure.
Pick an end date
The later date — or any second date, the calculator handles either order.
Read the result
Total days, weeks, and a full years/months/days breakdown appear instantly.
Frequently asked questions
Does it matter which date I put first?
No — if the end date is earlier than the start date, the calculator simply swaps them and shows the same result.
Are both dates counted as full days?
The total-days figure counts the number of days between the two dates. For example, from January 1 to January 3 is 2 days.
Is my data saved anywhere?
No. The dates you enter are used only to calculate the result locally in your browser — nothing is stored or transmitted.