How to convert weeks to days
To convert a measurement in weeks to days, multiply the value by 7. The conversion factor comes from the relationship between both units and the second.
For example, to convert 5 wk to days: 5 × 7 = 35 d.
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.
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.
Weeks to days worked examples
Here are some common values converted:
1 wk = 7 d 5 wk = 35 d 10 wk = 70 d 50 wk = 350 d 100 wk = 700 d
Frequently asked questions
How many days are in one week?
One week (wk) equals 7 days (d). Multiply any value in weeks by 7 to convert to days.
How do I convert weeks to days?
Multiply the value in weeks by 7. For example, 5 wk × 7 = 35 d.
How do I convert days to weeks?
Multiply the value in days by 0.142857142857, or divide by 7. Use the swap button on the converter above to reverse the direction.
Is the week to day 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 weeks to days?
The formula is: d = wk × 7. This comes from the definition of both units relative to the second.