Time Units Explained
Time measures duration between events. Different units used in different contexts.
Basic Time Units
Fundamental units used daily.
Second
SI base unit. 1 minute = 60 seconds.
Minute
60 seconds. 1 hour = 60 minutes.
Hour
60 minutes or 3,600 seconds. 1 day = 24 hours.
Day
24 hours, 1,440 minutes or 86,400 seconds.
Large Time Units
Units for longer durations.
Week
7 days, 168 hours or 10,080 minutes.
Month
28-31 days, average 30.44 days.
Year
365.25 days, 8,760 hours or 31,536,000 seconds.
Decade
10 years.
Century
100 years.
Small Time Units
High-precision units in technology.
Millisecond
1/1,000 second. 1 second = 1,000 milliseconds.
Microsecond
1/1,000,000 second. 1 ms = 1,000 μs.
Nanosecond
1/1,000,000,000 second. 1 μs = 1,000 ns.
Special Units
Swatch Beat
1 day = 1,000 beats. 1 beat = 86.4 seconds.
Koku
Traditional Japanese unit. 1 koku = 15 minutes.