Time
Days to Seconds
Convert days to seconds instantly.
About this conversion
Days (d) are the foundation of calendars and used to indicate duration in everyday life. Seconds (s) are the SI base unit for time and form the foundation of all other time units. 1 Days equals 86,400 seconds. The converter above calculates the result instantly — you can also swap the units to convert in the other direction.
How to use
Enter a value in the days field and instantly see the result in seconds. Click the swap button to reverse the conversion.
Manual calculation
1 days = 86,400 seconds. Example: 10 d = 864,000 s.
Frequently asked questions
How do you convert days to seconds?
Multiply the number of days by 86,400 to get seconds. Example: 5 d × 86,400 = 432,000 s.
Are days bigger or smaller than seconds?
Days is larger than Seconds. One day equals 86,400 seconds, so the result is a larger number when converting from days to seconds.
What is 2 days in seconds?
2 d equals 172,800 s.
How many days are in 1 second?
1 s equals 0.000011574 d. This is the reverse conversion — useful if you have a value in seconds and want it in days.
What is day?
Days (d) are the foundation of calendars and used to indicate duration in everyday life.
What is second used for?
Seconds (s) are the SI base unit for time and form the foundation of all other time units.