How Many Weeks, Hours, Minutes & Seconds Are in a Year? (Simple 2025 Guide) Updated 2025
Quick answers: A common year (365 days) has 52 weeks + 1 day, 8,760 hours, 525,600 minutes, and 31,536,000 seconds. A leap year (366 days) has 52 weeks + 2 days, 8,784 hours, 527,040 minutes, and 31,622,400 seconds.
Use the simple calculators below to check any year, compare common vs leap totals, and convert years to hours, minutes, and seconds.
Basics: 365 vs 366 Days
Common Year (365 days)
- Weeks: 52 weeks + 1 day (≈ 52.1429 weeks)
- Hours: 8,760
- Minutes: 525,600
- Seconds: 31,536,000
Leap Year (366 days)
- Weeks: 52 weeks + 2 days (≈ 52.2857 weeks)
- Hours: 8,784
- Minutes: 527,040
- Seconds: 31,622,400
Takeaway: Numbers change by just one day, but that’s 24 hours—enough to shift weekly and hourly totals.
Where to Learn More
- All about weeks in a year (and why it’s 52 + extra days).
- Plan your schedule with working days in a year.
- Balance rest with weekends in a year.
- Understand the leap-year rule on this page.
Takeaway: Pick the year type you need (365 vs 366) and convert—simple.
Frequently Asked Questions
How many weeks are in a year?
A common year has 52 weeks + 1 day (≈52.1429 weeks). A leap year has 52 weeks + 2 days (≈52.2857 weeks). For more, see our weeks page.
How many hours, minutes, and seconds are in a year?
Common year (365 days): 8,760 hours, 525,600 minutes, 31,536,000 seconds. Leap year (366 days): 8,784 hours, 527,040 minutes, 31,622,400 seconds.
Is this year a leap year?
Use the leap-year rule (4 / 100 / 400) or check our guide: How Many Days in a Leap Year?
Why use an “average” year of 365.2422 days?
It’s the approximate length of the tropical year (Earth’s orbit). Converting with 365.2422 is handy for science or long-term averages.