⚡ Free Online Tool

Weeks Calculator

Find the exact number of weeks between any two dates — plus total days, months, hours, and the leftover days after full weeks.

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Weeks
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Extra Days
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Total Days
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~Months
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Total Hours
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Start Day of Week
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End Day of Week
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Free Weeks Calculator — Exact Weeks Between Any Two Dates

This weeks calculator tells you precisely how many weeks fall between any two dates. Pick a start and end date, and instantly see the result: full weeks, the remaining days after those weeks, total days, an approximate month count, total hours, and the day of the week each date falls on.

📐 Precise Breakdown

Shows both full weeks and the leftover days — so 16 days reads as 2 weeks and 2 days, not just "2 weeks."

🔁 Swap Dates Instantly

Flip start and end with one click — useful when you're not sure which direction to calculate.

📅 Any Two Dates

Past, present, or future — calculate weeks between project deadlines, milestones, or anniversaries.

⚡ Instant Result

No server round-trip. Everything is calculated immediately in your browser.

Frequently Asked Questions

How are weeks calculated?

The tool counts the total number of days between the two dates (inclusive of the start, exclusive of the end), then divides by 7. The quotient is the number of full weeks; the remainder is the extra days shown in the "Extra Days" card.

What does "Extra Days" mean?

After dividing the total days by 7, there may be 1–6 days left over that don't make a complete week. For example, 23 days = 3 weeks + 2 extra days.

Can the end date be before the start date?

No — the tool validates that the end date is on or after the start date. Use the Swap button to reverse the order of your dates if needed.

Does it handle leap years?

Yes. The calculation uses JavaScript's built-in Date object, which correctly handles leap years and all calendar edge cases.

What does "~Months" mean?

This is an approximate month count, calculated by dividing the total days by 30.4375 (the average number of days per calendar month). It's a rough guide — use the Date Calculator for exact month differences.

Is this tool free?

Yes — completely free, no account required, and no data is sent to any server.

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