Days to Seconds converter

Convert days (d) to seconds (s) — results update instantly as you type.

Days to Seconds

To86,400

1 d = 86,400 s

How to convert Days to Seconds

Time conversion spans tiny durations in seconds to long spans in weeks, months, and years. Months and years use the astronomical average: a year is 31,556,952 seconds (365.2425 days) and a month is one twelfth of that.

Seconds, minutes, hours, days, and weeks are exact multiples of each other (60 s = 1 min, 24 h = 1 day, 7 d = 1 wk). Months and years use average values so results stay consistent regardless of the calendar.

Formula

d × 86,400 = s

Multiply your days value by 86,400 to get seconds. For the reverse, divide by the same factor.

Days to Seconds conversion table

DaysSeconds
1 d86,400 s
2 d172,800 s
5 d432,000 s
10 d864,000 s
25 d2,160,000 s
100 d8,640,000 s

Common use cases

  • Payroll and billing between hours, days, and weeks
  • Project timelines between weeks and months
  • Age and duration calculations
  • Countdowns and event planning

Frequently asked questions

Exactly 86,400 seconds (24 hours × 60 minutes × 60 seconds).