Convert Weeks (wk) to Days (d)
1 week equals 7 days.
Week to Day Converter
What Is a Week?
A week is a unit of time equal to exactly 7 days (168 hours, 604,800 seconds). It is universally used for scheduling, work cycles, and calendar organisation.
What Is a Day?
A day is a fixed unit of time equal to exactly 24 hours (86,400 seconds). It is the base unit for calendar calculations and daily scheduling.
Weeks to Days Formula
The conversion is exact:
days = weeks × 7 exact
1 week = 7 days exactly, by universal definition.
Worked Example
How many days is 6 weeks?
- Multiply: 6 × 7 = 42 days
Common Use Cases
- Project planning: Converting sprint or milestone durations from weeks to days. A 2-week sprint = 14 calendar days (10 working days).
- Medical: Pregnancy is tracked in weeks (40 weeks = 280 days) and infant development milestones are given in weeks.
- Fitness programmes: Training plans specified in weeks converted to day counts for scheduling.
- Legal notice periods: Employment contracts and regulations often specify notice in weeks that must be counted in calendar days.
Frequently Asked Questions
How many days are in a week?
Exactly 7 days. This has been universal across cultures for thousands of years, likely originating from the Babylonian calendar (based on the ~7-day quarter of the lunar cycle).
How many weeks are in a year?
52.1775 weeks (365.25 days ÷ 7). A standard year has 52 weeks plus 1 day; a leap year has 52 weeks plus 2 days. ISO 8601 defines either 52 or 53 full weeks per year.
How many working days are in a week?
Typically 5 working days (Monday–Friday) in most countries. Some countries use a 6-day work week. When converting weeks to working days, multiply weeks by 5 (not 7).
What is 40 weeks in days?
40 × 7 = 280 days. This is the standard length of human pregnancy (counted from the last menstrual period). It equals approximately 9 months and 10 days.
Weekdays vs calendar days: A 7-day week contains 5 weekdays and 2 weekend days. When scheduling “5 business days,” that equals 1 calendar week. For “10 business days,” that’s 2 calendar weeks (14 days).
Related Time Converters
- Weeks to Hours — 1 week = 168 hours
- Years to Weeks — 1 year = 52.14 weeks
- Days From Today Calculator
- Days Until Calculator
Weeks to days Conversion Table
Reference table with common weeks to days conversions. All values calculated with high precision.
Days to Weeks Table
10 to 1000000
Looking for the reverse? Convert Day to Week
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