Time Converter
Convert between time units: seconds, minutes, hours, days, weeks, months, years, milliseconds, and microseconds.
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How the Time Converter Works
This tool instantly converts between time units of measurement, from microseconds in computing to years in the calendar. It uses standard conversion factors from the International System.
Supported Time Units
The converter uses the second as the SI base unit:
- Microsecond: 1 µs = 10^-6 s. Used in computing and telecommunications
- Millisecond: 1 ms = 10^-3 s. Screen and network response times
- Second (s): SI base unit of time, defined via the cesium-133 atom
- Minute: 1 min = 60 s
- Hour: 1 h = 3,600 s
- Day: 1 d = 86,400 s
- Week: 1 week = 604,800 s = 7 days
- Month: 1 month = 2,629,800 s (30.4375 days). Gregorian calendar average
- Year: 1 year = 31,557,600 s (365.25 days). Standard Julian year
Key Conversion Factors
| From | To | Factor |
|---|
| 1 hour | minutes | 60 |
| 1 day | hours | 24 |
| 1 week | days | 7 |
| 1 year | days | 365.25 |
| 1 year | hours | 8,766 |
| 1 year | seconds | 31,557,600 |
Frequently Asked Questions
Why is a year calculated as 365.25 days?▼
The value of 365.25 days is the Julian year, used as a standard in astronomy and the International System. It accounts for leap years (1 every 4 years on average). The Gregorian calendar is more precise at 365.2425 average days, but the difference is minimal for most conversions.
How many seconds are in a day?▼
A day has exactly 86,400 seconds (24 hours x 60 minutes x 60 seconds). In a year (365.25 days) there are 31,557,600 seconds, approximately 31.6 million.
How many hours are in a week?▼
A week has exactly 168 hours (7 days x 24 hours). The standard work week is 40 hours, which is about 23.8% of the total hours in a week.
