How to convert days to weeks
To convert a measurement in days to weeks, multiply the value by 0.142857142857. The conversion factor comes from the relationship between both units and the second.
For example, to convert 5 d to weeks: 5 × 0.142857142857 = 0.714285714286 wk.
What is a day?
A day is a unit of time equal to 24 hours or 86,400 seconds, based on one full rotation of the Earth on its axis. The day is humanity's oldest natural time unit, set by the cycle of light and dark. The exact 86,400-second day is a civil convention; the true solar day varies slightly through the year.
Common uses of days include: Calendars and daily scheduling; Project timelines and deadlines; Shipping and delivery estimates; Medication dosing intervals.
What is a week?
A week is a unit of time equal to 7 days or 604,800 seconds. The seven-day week has ancient roots in Babylonian astronomy and Jewish tradition, and unlike other calendar units it has no basis in astronomical cycles, running continuously for millennia.
Common uses of weeks include: Work and school scheduling; Pay periods and billing cycles; Pregnancy and gestation tracking; Project sprints and planning.
Days to weeks worked examples
Here are some common values converted:
1 d = 0.142857142857 wk 5 d = 0.714285714286 wk 10 d = 1.428571 wk 50 d = 7.142857 wk 100 d = 14.285714 wk
Frequently asked questions
How many weeks are in one day?
One day (d) equals 0.142857142857 weeks (wk). Multiply any value in days by 0.142857142857 to convert to weeks.
How do I convert days to weeks?
Multiply the value in days by 0.142857142857. For example, 5 d × 0.142857142857 = 0.714285714286 wk.
How do I convert weeks to days?
Multiply the value in weeks by 7, or divide by 0.142857142857. Use the swap button on the converter above to reverse the direction.
Is the day to week conversion exact?
Fixed units (second through week) are exact. Month and year use the average Gregorian calendar length (30.44 and 365.2425 days) since these vary in practice.
What is the formula for days to weeks?
The formula is: wk = d × 0.142857142857. This comes from the definition of both units relative to the second.