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Time • NIST Exact

Seconds → Days

s → d

Enter any value for instant conversion. Click on the result to copy with unit.

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NIST Exact

Based on U.S. National Institute of Standards

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Seconds to Days Formula

To convert from Seconds to Days, you can use the following formula:

Days = Seconds × NaN

This means you need to multiply your Seconds value by NaN to get the equivalent value in Days.

s → d Reference Table

s d
0.001 s 1.157407407e-8 d
0.002 s 2.314814815e-8 d
0.003 s 3.472222222e-8 d
0.004 s 4.62962963e-8 d
0.005 s 5.787037037e-8 d
0.006 s 6.944444444e-8 d
0.007 s 8.101851852e-8 d
0.008 s 9.259259259e-8 d
0.009 s 1.041666667e-7 d
0.01 s 1.157407407e-7 d
0.02 s 2.314814815e-7 d
0.03 s 3.472222222e-7 d
0.04 s 4.62962963e-7 d
0.05 s 5.787037037e-7 d
0.06 s 6.944444444e-7 d
0.07 s 8.101851852e-7 d
0.08 s 9.259259259e-7 d
0.09 s 0.000001041666667 d
0.1 s 0.000001157407407 d
0.2 s 0.000002314814815 d
0.3 s 0.000003472222222 d
0.4 s 0.00000462962963 d
0.5 s 0.000005787037037 d
0.6 s 0.000006944444444 d
0.7 s 0.000008101851852 d
0.8 s 0.000009259259259 d
0.9 s 0.00001041666667 d
1 s 0.00001157407407 d
1.5 s 0.00001736111111 d
2 s 0.00002314814815 d
2.5 s 0.00002893518519 d
3 s 0.00003472222222 d
3.5 s 0.00004050925926 d
4 s 0.0000462962963 d
4.5 s 0.00005208333333 d
5 s 0.00005787037037 d
5.5 s 0.00006365740741 d
6 s 0.00006944444444 d
6.5 s 0.00007523148148 d
7 s 0.00008101851852 d
7.5 s 0.00008680555556 d
8 s 0.00009259259259 d
8.5 s 0.00009837962963 d
9 s 0.0001041666667 d
9.5 s 0.0001099537037 d
10 s 0.0001157407407 d
11 s 0.0001273148148 d
12 s 0.0001388888889 d
13 s 0.000150462963 d
14 s 0.000162037037 d
15 s 0.0001736111111 d
16 s 0.0001851851852 d
17 s 0.0001967592593 d
18 s 0.0002083333333 d
19 s 0.0002199074074 d
20 s 0.0002314814815 d
25 s 0.0002893518519 d
30 s 0.0003472222222 d
35 s 0.0004050925926 d
40 s 0.000462962963 d
45 s 0.0005208333333 d
50 s 0.0005787037037 d
55 s 0.0006365740741 d
60 s 0.0006944444444 d
65 s 0.0007523148148 d
70 s 0.0008101851852 d
75 s 0.0008680555556 d
80 s 0.0009259259259 d
85 s 0.0009837962963 d
90 s 0.001041666667 d
95 s 0.001099537037 d
100 s 0.001157407407 d
120 s 0.001388888889 d
125 s 0.001446759259 d
130 s 0.00150462963 d
140 s 0.00162037037 d
150 s 0.001736111111 d
160 s 0.001851851852 d
175 s 0.002025462963 d
180 s 0.002083333333 d
200 s 0.002314814815 d
225 s 0.002604166667 d
250 s 0.002893518519 d
275 s 0.00318287037 d
300 s 0.003472222222 d
350 s 0.004050925926 d
400 s 0.00462962963 d
450 s 0.005208333333 d
500 s 0.005787037037 d
600 s 0.006944444444 d
700 s 0.008101851852 d
750 s 0.008680555556 d
800 s 0.009259259259 d
900 s 0.01041666667 d
1000 s 0.01157407407 d
1200 s 0.01388888889 d
1250 s 0.01446759259 d
1500 s 0.01736111111 d
1750 s 0.02025462963 d
2000 s 0.02314814815 d
2500 s 0.02893518519 d
3000 s 0.03472222222 d
4000 s 0.0462962963 d
4500 s 0.05208333333 d
5000 s 0.05787037037 d
6000 s 0.06944444444 d
7000 s 0.08101851852 d
7500 s 0.08680555556 d
8000 s 0.09259259259 d
9000 s 0.1041666667 d
10000 s 0.1157407407 d
15000 s 0.1736111111 d
20000 s 0.2314814815 d
25000 s 0.2893518519 d
50000 s 0.5787037037 d
75000 s 0.8680555556 d
100000 s 1.157407407 d

Values based on NIST SP 811 conversion factors

Why Convert Seconds to Days?

Converting between seconds (s) and days (d) is one of the most common time conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert s to d saves time and prevents errors.

Time conversion between s and d is essential for project management, astronomy, and high-speed electronics. While day-to-day scheduling is simple, scientific and engineering fields often require converting between vast timescales (millennia) and infinitesimal ones (nanoseconds). Video editors and audio engineers work with frames and samples that require precise time unit conversions to sync media perfectly. In logistics, accurate delivery estimates depend on converting travel durations across time zones and varying speed metrics. Miscalculating time units can lead to missed deadlines, data desynchronization, or navigation errors in GPS systems.

How to Convert Seconds to Days

To convert seconds to days, use the following formula:

d = s × 0.00001157407407

Example: 1 s = 0.00001157407407 d

For example, 5 s = 0.00005787037037 d, 10 s = 0.0001157407407 d, and 100 s = 0.001157407407 d. For larger values, 1000 s = 0.01157407407 d. Conversely, 1 d = 86400 s. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

  • Decimal time: thinking 1.50 hours is 1 hour 50 minutes (it's 1 hour 30 minutes).
  • Leap years: assuming every year has 365 days.
  • Month length: assuming all months are 30 days.

Pro Tips

  • Excel format: Be careful converting time in Excel; it stores dates as serial numbers.
  • Time zones: Always specify UTC offset when scheduling international calls.
  • Seconds in day: There are 86,400 seconds in a standard day.

What is a Second?

The second (s) is the base unit of time in the International System of Units (SI). Historically based on Earth's rotation, it is now defined by the radiation frequency of the caesium-133 atom.

Seconds are the fundamental unit of time used universally in science, technology, sports, and daily life.

What is a Day?

A unit of time based on Earth's rotation, equal to 24 hours.

Basic unit for daily life and calendars.

Frequently Asked Questions

Time More Conversions

h → minmin → hd → hh → dwk → dmin → s

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