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Conversion

Days to Seconds Converter

1 day = 86,400 s. Enter any value to convert days (d) to seconds (s), or use the table below for common values.

Results

1 d =86,400 sdays → seconds
1 d86,400 s
1 s0.00001157407407 d
Formula
s = d × 86,400
1 d in other units
UnitValue
seconds (s)86,400
minutes (min)1,440
hours (h)24
weeks (wk)0.1428571429
months (mo)0.03285488408
years (yr)0.002737907007

Formula

s = d × 86,400

Example: 10 d = 864,000 s. To convert the other way, use d = s × 0.00001157407407.

Quick mental estimate: multiply by about 86,000.

Days to Seconds conversion table

Days (d)Seconds (s)
1 d86,400 s
2 d172,800 s
3 d259,200 s
4 d345,600 s
5 d432,000 s
6 d518,400 s
7 d604,800 s
8 d691,200 s
9 d777,600 s
10 d864,000 s
15 d1,296,000 s
20 d1,728,000 s
25 d2,160,000 s
30 d2,592,000 s
40 d3,456,000 s
50 d4,320,000 s
75 d6,480,000 s
100 d8,640,000 s
250 d21,600,000 s
500 d43,200,000 s
1,000 d86,400,000 s

About days and seconds

A day is 24 hours, or 86,400 seconds (ignoring occasional leap seconds).

The second is the SI base unit of time, defined by 9,192,631,770 oscillations of a caesium-133 atom.

Other Time conversions

Seconds → DaysReverse conversionMinutes → Secondsmin → sHours → Secondsh → sDays → Minutesd → minDays → Hoursd → hDays → Weeksd → wkDays → Monthsd → moDays → Yearsd → yrWeeks → Secondswk → sMonths → Secondsmo → sYears → Secondsyr → s

Frequently asked questions

How do I convert days to seconds?

Use the formula s = d × 86,400. For example, 10 d = 864,000 s.

What is 1 day in seconds?

1 d = 86,400 s.

How do I convert seconds back to days?

Use d = s × 0.00001157407407. 1 s = 0.00001157407407 d.