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Day (d)

24 hours.

Result86,400,000

1 day = 86,400,000 milliseconds

Day at a glance

Unit nameDay (plural: days)
Symbold
Quantity measuredTime
Measurement systemMetric
Also known asd, days
Definition exact?Yes — exact by definition

1 day in other time units

Unit1 d equals
Nanosecond86,400,000,000,000 ns
Microsecond86,400,000,000 µs
Millisecond86,400,000 ms
Second86,400 s
Minute1,440 min
Hour24 h
Week0.142857143 wk
Month0.032854884 mo
Year0.002737907 yr
Decade0.000273791 dec
Century0.000027379 c
Millennium0.000002738 ky
Fortnight0.071428571 fn

Popular day conversions

Frequently asked questions

What is a day?
24 hours.
What is the symbol for the day?
The symbol for the day is d. It measures time.
How many milliseconds are in a day?
1 day = 86,400,000 milliseconds.
How many seconds are in a day?
1 day = 86,400 seconds.
How many minutes are in a day?
1 day = 1,440 minutes.