Enter a number of weeks and instantly see the equivalent in days — or flip it around and convert days back to weeks. The Weeks to Days Converter uses the simple formula days = weeks × 7 and also shows a handy reference table for common week-to-day values.
Days
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Weeks
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Whole Weeks
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Remaining Days
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There are exactly 7 days in a week. This is a universally accepted standard used across calendars worldwide. The seven days are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday.
To convert weeks to days, multiply the number of weeks by 7. For example, 5 weeks equals 5 × 7 = 35 days. This formula works for any number of weeks, including decimals — for instance, 2.5 weeks equals 17.5 days.
To convert days back to weeks, divide the number of days by 7. For example, 84 days ÷ 7 = 12 weeks. If the result isn't a whole number, the decimal portion represents a partial week.
A week is a unit of time consisting of seven consecutive days. The symbol for week is 'wk'. Weeks are commonly used for scheduling, project planning, and tracking recurring events.
A day is a unit of time equal to 24 hours, or 86,400 seconds. The symbol for day is 'd'. It corresponds to one full rotation of the Earth on its axis and is the basis of most everyday time measurement.
Four weeks is equal to 28 days (4 × 7 = 28). This is sometimes referred to as a 'lunar month' since it approximates one cycle of the Moon.
Yes. The conversion formula works for decimals too. Simply multiply by 7 — for example, 1.5 weeks = 1.5 × 7 = 10.5 days. This calculator supports decimal inputs for both weeks and days.
100 days equals approximately 14.2857 weeks (100 ÷ 7 ≈ 14.29). That breaks down to 14 whole weeks and 2 remaining days.