Sumwise

Days to seconds

seconds = days × 86,400

Reverse: seconds to days

How to convert days to seconds

One day is 86,400 seconds, so multiply the number of days by 86,400. For example, 20 days is 20 × 86,400 = 1,728,000 seconds. To go back, divide by the same number, or multiply by 0.00001157.

Quick estimate

Multiplying by about 90000 gets within 4.2% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Time conversions come up in planning and scheduling, timesheets and pay, project estimates and working out ages or durations.

daysseconds
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
11 d950,400 s
12 d1,036,800 s
13 d1,123,200 s
14 d1,209,600 s
15 d1,296,000 s
16 d1,382,400 s
17 d1,468,800 s
18 d1,555,200 s
19 d1,641,600 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
60 d5,184,000 s
70 d6,048,000 s
75 d6,480,000 s
80 d6,912,000 s
90 d7,776,000 s
100 d8,640,000 s
120 d10,368,000 s
150 d12,960,000 s
200 d17,280,000 s
250 d21,600,000 s
300 d25,920,000 s
400 d34,560,000 s
500 d43,200,000 s
750 d64,800,000 s
1,000 d86,400,000 s
1,500 d129,600,000 s
2,000 d172,800,000 s
5,000 d432,000,000 s
10,000 d864,000,000 s

Questions

How many seconds are in a day?

86,400 seconds.

How do I convert days to seconds in a spreadsheet?

Put the value in A1 and type =A1*86400, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.