Time Converter
Convert between seconds, minutes, hours, days, weeks, months and years instantly.
What is a Time Converter?
A time converter is a tool that helps you convert durations from one unit of time to another. Time is a fundamental dimension that measures the duration of events and the intervals between them.
Time conversions are essential for scheduling, project management, scientific calculations, cooking, exercise tracking, and understanding historical timelines.
Our converter handles all common time units from milliseconds (used in computing) to centuries (used in history), making it versatile for any application.
Time Conversion Formulas
Basic Conversions
- Seconds to Minutes: min = s Γ· 60
- Minutes to Hours: h = min Γ· 60
- Hours to Days: d = h Γ· 24
- Days to Weeks: wk = d Γ· 7
- Days to Years: yr = d Γ· 365
Quick Reference Table
| Unit | Seconds | Minutes | Hours |
|---|---|---|---|
| 1 minute | 60 | 1 | 0.0167 |
| 1 hour | 3,600 | 60 | 1 |
| 1 day | 86,400 | 1,440 | 24 |
| 1 week | 604,800 | 10,080 | 168 |
| 1 month (30d) | 2,592,000 | 43,200 | 720 |
| 1 year (365d) | 31,536,000 | 525,600 | 8,760 |
Common Time Conversions
Minutes to Hours
- 15 minutes = 0.25 hours (quarter hour)
- 30 minutes = 0.5 hours (half hour)
- 45 minutes = 0.75 hours
- 90 minutes = 1.5 hours
- 120 minutes = 2 hours
- 180 minutes = 3 hours
Hours to Days
- 6 hours = 0.25 days (quarter day)
- 12 hours = 0.5 days (half day)
- 24 hours = 1 day
- 48 hours = 2 days
- 72 hours = 3 days
- 168 hours = 7 days (1 week)
Days to Other Units
- 7 days = 1 week
- 14 days = 2 weeks (fortnight)
- 30 days = 1 month (approx)
- 90 days = 3 months (quarter)
- 365 days = 1 year
- 3,650 days = 10 years (decade)
Interesting Time Facts
- 1 billion seconds β 31.7 years
- 1 million seconds β 11.6 days
- 10,000 hours (mastery rule) β 1.14 years (non-stop)
- Average lifespan (80 years) β 2.5 billion seconds
Frequently Asked Questions
How many seconds are in a day?
There are 86,400 seconds in a day. This is calculated as: 24 hours Γ 60 minutes Γ 60 seconds = 86,400 seconds. This number is important in computing, where Unix timestamps count seconds since January 1, 1970.
How many hours are in a year?
There are 8,760 hours in a regular year (365 days Γ 24 hours) and 8,784 hours in a leap year (366 days Γ 24 hours). On average, considering leap years, there are about 8,765.81 hours per year.
Why are there 60 seconds in a minute?
The base-60 (sexagesimal) system comes from ancient Babylon, where 60 was valued because it has many divisors (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60). This makes it easy to divide time into halves, thirds, quarters, and more without fractions.
What is a fortnight?
A fortnight is a period of 14 days or 2 weeks. The term comes from the Old English "fΔowertyne niht" meaning "fourteen nights." It's commonly used in the UK and Commonwealth countries but rarely in the US.
How long is a leap year?
A leap year has 366 days (instead of 365), adding an extra day in February. Leap years occur every 4 years, except for years divisible by 100 (unless also divisible by 400). This keeps our calendar aligned with Earth's orbit.
Time Conversion Tips
- Hours to minutes: Multiply by 60 (or add a zero and multiply by 6)
- Days to hours: Multiply by 24
- Weeks to days: Multiply by 7
- Years to days: Multiply by 365 (or 365.25 for accuracy)
- Remember: A month varies (28-31 days), so use 30 for estimates
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