Weeks to Days Converter
Convert weeks to days instantly for scheduling and planning
Convert Weeks to Days
Conversion Result
Conversion Formula: weeks Γ 7 = days
Calculation: 0 weeks Γ 7 = 0 days
Definition: 1 week = 7 days (by definition)
Quick Conversion Table
| Weeks | Days |
|---|---|
| 1 week | 7 days |
| 2 weeks | 14 days |
| 3 weeks | 21 days |
| 4 weeks | 28 days |
| 5 weeks | 35 days |
| 6 weeks | 42 days |
| 7 weeks | 49 days |
| 8 weeks | 56 days |
| 10 weeks | 70 days |
| 12 weeks | 84 days |
| 13 weeks | 91 days |
| 26 weeks | 182 days |
| 52 weeks | 364 days |
| 104 weeks | 728 days |
Common Time Periods in Days
π 1 Week
= 7 days
A standard calendar week
π 2 Weeks (Fortnight)
= 14 days
Common pay period
π 4 Weeks
= 28 days
Approximately 1 month
π 13 Weeks
= 91 days
1 quarter (3 months)
π 52 Weeks
= 364 days
Almost a full year
π 104 Weeks
= 728 days
Approximately 2 years
Quick Reference
Time Conversion Tips
1 week always equals exactly 7 days
52 weeks = 364 days (1 day less than a year)
A fortnight is exactly 2 weeks or 14 days
4 weeks β 1 month (28 vs 30-31 days)
Use for project planning and scheduling
Understanding Weeks and Days
What is a Week?
A week is a time unit equal to seven days. It is the standard time period used for cycles of work days and rest days in most parts of the world. The seven-day week has ancient origins, dating back to Babylonian times, and is now nearly universal.
Why Seven Days?
The seven-day week corresponds roughly to a quarter of a lunar month (moon cycle). Ancient civilizations observed that the moon goes through four distinct phases (new, first quarter, full, and last quarter), each lasting about 7 days.
Conversion Formula
Days = Weeks Γ 7
Weeks = Days Γ· 7
Example: How many days are in 3.5 weeks?
3.5 weeks Γ 7 = 24.5 days
Fun Fact: The word "week" comes from the Old English "wice," which originally meant "a turning" or "succession."
Practical Applications of Week-Day Conversions
π Project Management
Convert project timelines from weeks to days for detailed scheduling.
- β’ Sprint planning (2-week sprints = 14 days)
- β’ Milestone tracking
- β’ Resource allocation
- β’ Deadline calculations
πΌ Business & HR
Calculate pay periods, vacation days, and employment durations.
- β’ Bi-weekly payroll (2 weeks = 14 days)
- β’ Vacation accrual
- β’ Notice periods
- β’ Probation periods
π₯ Health & Fitness
Track workout programs, diet plans, and medical treatments.
- β’ 12-week fitness programs = 84 days
- β’ Medication schedules
- β’ Recovery periods
- β’ Challenge tracking
Real-World Time Period Examples
π Academic Periods
University Semester
β 15-16 weeks (105-112 days)
Summer Break
β 12-14 weeks (84-98 days)
School Quarter
β 9-10 weeks (63-70 days)
πΆ Pregnancy & Development
Full Pregnancy
β 40 weeks (280 days)
First Trimester
β 13 weeks (91 days)
Newborn Period
First 4 weeks (28 days)
πͺ Fitness Programs
8-Week Challenge
= 56 days
12-Week Transformation
= 84 days
6-Month Program
β 26 weeks (182 days)
ποΈ Travel & Vacation
Extended Vacation
3 weeks = 21 days
Summer Holiday
6 weeks = 42 days
Sabbatical Leave
12 weeks = 84 days
Frequently Asked Questions
How many days are in a week?
There are exactly 7 days in a week. This is a universal standard used worldwide in the Gregorian calendar. The seven days are: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.
How many days is a week and a half?
A week and a half equals 10.5 days. This is calculated as: 1 week (7 days) + 0.5 weeks (3.5 days) = 10.5 days. This is commonly used in informal time references, such as "I'll be back in a week and a half."
Are 14 days equal to 2 weeks?
Yes, 14 days equals exactly 2 weeks (14 Γ· 7 = 2). This is also called a "fortnight," which is a term more commonly used in British English. Many pay periods, rental agreements, and subscriptions use 2-week (14-day) intervals.
How many weeks are in a year?
There are approximately 52 weeks in a year. More precisely, there are 52.1429 weeks in a standard 365-day year (365 Γ· 7 = 52.1429). A leap year with 366 days has 52.2857 weeks. This is why 52 weeks only equals 364 days, leaving one or two days remaining in a year.
Why isn't a month exactly 4 weeks?
Although 4 weeks equals 28 days, most months have 30 or 31 days (February has 28 or 29). This is because our calendar system is based on the solar year (Earth's orbit around the sun) rather than lunar cycles. On average, a month is about 4.34524 weeks. Only February in non-leap years equals exactly 4 weeks (28 days).
What is a fortnight and how many days is it?
A fortnight is a period of 14 consecutive days, or exactly 2 weeks. The term comes from Old English "fΔowertΔ«ene niht," meaning "fourteen nights." While less common in American English, it's frequently used in British English, Australian English, and appears in literature and formal contexts worldwide.