Date Difference Calculator

Q: "How many days between two dates?"

"Enter the start and end date. The calculator gives the number of days (and optionally weeks) between them."

Q: "Does it include the start and end day?"

"Typically the difference is exclusive of one end (e.g. Jan 1 to Jan 2 = 1 day). Check the tool for the exact convention."

Q: "What date format can I use?"

"Common formats: YYYY-MM-DD, MM/DD/YYYY, DD/MM/YYYY. Use the format your browser or locale expects."

Q: "Can I get weeks or months?"

"Yes. The tool shows days and can show approximate weeks (days ÷ 7) or a rough month count."

Q: "What if the end date is before the start date?"

"The result is usually a negative number of days, or the tool may ask you to swap the dates."

Calculate days (and weeks, months) between two dates. Example: Jan 1, 2025 to Mar 15, 2025 → 73 days. Copy result.

Date difference is the number of days (and optionally weeks) between two dates. Enter the start date and end date. The calculator gives the difference. Use YYYY-MM-DD or your locale format. Copy the result or Copy with labels.

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Examples

Jan 1, 2025 to Mar 15, 2025 → 73 days
2024-01-01 to 2024-12-31 → 365 days (leap year: 366)
Today to next year same day → 365 or 366 days

FAQ

How many days between two dates?

Enter the start and end date. The calculator gives the number of days (and optionally weeks) between them.

Does it include the start and end day?

Typically the difference is exclusive of one end (e.g. Jan 1 to Jan 2 = 1 day). Check the tool for the exact convention.

What date format can I use?

Common formats: YYYY-MM-DD, MM/DD/YYYY, DD/MM/YYYY. Use the format your browser or locale expects.

Can I get weeks or months?

Yes. The tool shows days and can show approximate weeks (days ÷ 7) or a rough month count.

What if the end date is before the start date?

The result is usually a negative number of days, or the tool may ask you to swap the dates.