Manage schedules and calculate durations instantly with our free Time Converters. Whether you are planning a project, calculating age, or solving a physics problem, these tools are fast and reliable.
Browse the list below to instantly convert between Seconds, Minutes, Hours, and larger units like Days, Weeks, Months, and Years.
Master Time Converter
Time Conversion Directory
Navigate through our comprehensive list of time units, from atomic nanoseconds to historical millennia.
Standard Time
- Seconds to Minutes
- Minutes to Hours
- Hours to Days
- Days to Weeks
- Weeks to Months
- Hours to Seconds
Large Time Scales
- Years to Decades
- Decades to Centuries
- Centuries to Millennia
- Weeks to Fortnights
- Years to Months
- Quarters to Years
Scientific Scales
- Seconds to Milliseconds
- Milliseconds to Microseconds
- Microseconds to Nanoseconds
- Nanoseconds to Seconds
- Milliseconds to Seconds
- Microseconds to Milliseconds
Practical References
- Seconds in a Day
- Minutes in a Day
- Hours in a Week
- Days in a Year (Avg)
- Weeks in a Year
- Working Days Converter
Frequently Asked Questions
There are exactly 86,400 seconds in a standard 24-hour day. This is calculated by multiplying 24 hours × 60 minutes × 60 seconds.
Because months vary in length (28 to 31 days), our converter uses the Gregorian average of 30.44 days (365.25 days ÷ 12) for high-precision scientific and fiscal calculations.
A decade is a span of 10 years, whereas a century is a span of 100 years. Therefore, there are exactly 10 decades in one century.
A nanosecond is one-billionth of a second ($1 \times 10^{-9}$ seconds). It is a unit commonly used in computing and high-frequency physics.