Time Reference Sheet

1 millisecond (ms) = 0.001 second (s)

1 microsecond (µs) = 1×10⁻⁶ seconds (s)

1 nanosecond (ns) = 1×10⁻⁹ seconds (s)

1 minute (min) = 60 seconds (s)

1 hour (h) = 60 minutes (min) = 3,600 seconds (s)

1 day (d) = 24 hours (h) = 86,400 seconds (s)

1 week (wk) = 7 days (d) = 168 hours (h)

1 month (average) ≈ 30.436875 days (d) ≈ 730.485 h

1 year (Gregorian average) ≈ 365.2425 days (d)

1 decade = 10 years (avg.)

1/60 min ≈ 1 second

Half hour = 30 min = 1,800 s

1 day = 24 h = 1,440 min = 86,400 s

1 week = 7 d = 10,080 min

Gregorian averages used (month ≈ 30.436875 d, year ≈ 365.2425 d).

Use the Date Calculator for exact-by-calendar computations.