days to seconds converter

1 day equals 86,400 seconds. Conversions use s = d × 86400

d → 86,400 s

s = d × 86400

Converter

Worked examples

1 d = 86,400 s
2 d = 172,800 s
5 d = 432,000 s
10 d = 864,000 s
100 d = 8,640,000 s

days to seconds conversion table

d	s	Arithmetic
1 d	86,400 s	× 86400
2 d	172,800 s	× 86400
3 d	259,200 s	× 86400
4 d	345,600 s	× 86400
5 d	432,000 s	× 86400
6 d	518,400 s	× 86400
8 d	691,200 s	× 86400
10 d	864,000 s	× 86400
12 d	1,036,800 s	× 86400
15 d	1,296,000 s	× 86400
20 d	1,728,000 s	× 86400
25 d	2,160,000 s	× 86400
30 d	2,592,000 s	× 86400
40 d	3,456,000 s	× 86400
50 d	4,320,000 s	× 86400
60 d	5,184,000 s	× 86400
70 d	6,048,000 s	× 86400
80 d	6,912,000 s	× 86400
90 d	7,776,000 s	× 86400
100 d	8,640,000 s	× 86400

How to convert d to s

Take your value in days.
Multiply by 86400
That is your answer in seconds — no rounding needed until you choose a display precision.

Related conversions

s to d s to min s to h s to wk min to s h to s d to min d to h d to wk all time units

Questions

How many seconds in 1 day?

Exactly 86,400 s. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert d to s?

Multiply the days figure by 86400 — or use the converter above, which updates as you type.

Is d to s the same as s to d?

No — they are inverses. One d is 86,400 s, while one s is 0.0000115741 d.

What is 1 d in s?

1 d = 86,400 s (see the value page for the full arithmetic).