Unit Converter
Convert From Weeks to Days and Vice Versa
Weeks ↔ Days
Type in either weeks or days — it’ll convert to the other automatically!
📅 What is a Week?
A **week** is a standard unit of time consisting of **7 consecutive days**. It is widely used in calendars, work schedules, and time planning worldwide. 1 week = 7 days.
🗓️ What is a Day?
A **day** is the time it takes for the Earth to complete one rotation — approximately 24 hours. Days are the basic building blocks of weeks, months, and years.
🧠 Quick Comparison
| Unit | Equivalent | Used In |
|---|---|---|
| 1 Week | 7 Days | Work schedules, calendars, planning |
| 1 Day | 1/7 of a Week | Daily activities, routines |
🧮 How to Convert
Weeks to Days:
days = weeks × 7
Days to Weeks:
weeks = days ÷ 7
🧪 Example:
2.5 weeks × 7 = 17.5 days
💡 Quick Tip
Multiply by 7 to convert weeks to days. Divide by 7 to go the other way. This is especially useful in **academic schedules**, **fitness plans**, or **freelancer invoicing**.
🎉 Did You Know?
The 7-day week has **Babylonian origins**, tied to lunar phases and the seven visible celestial bodies. It was later adopted by the Romans and spread globally!
📆 Real-World Time Examples
- 1 week = 7 days (Monday to Sunday)
- 2 weeks = 14 days (biweekly)
- 4.3 weeks ≈ 30 days (average month)
- 52 weeks ≈ 365 days (1 year)
📊 Weeks to Days Conversion Chart
| Weeks | Days |
|---|---|
| 0.5 | 3.5 |
| 1 | 7 |
| 2 | 14 |
| 4 | 28 |
| 10 | 70 |
| 52 | 364 |
📜 Timeline: Weekly System Origins
- Ancient Babylonians: Used 7-day weeks for lunar cycles
- Roman Empire: Spread the 7-day calendar to Europe
- Today: Nearly all countries use the 7-day week format
🌐 When to Use Weeks vs Days
- 📆 Weeks: Courses, subscriptions, event planning
- 📅 Days: Specific tasks, countdowns, deadlines
- 🧮 Quick Tip: Multiply weeks × 7 to get days instantly
🎯 Interactive Converter
1 Week = 7 Days