How many seconds are in 1 millisecond?

1 ms equals 0.001 s. This is an exact conversion factor defined by NIST.

How do I convert milliseconds to seconds?

Multiply the value in ms by the conversion factor. For example, 10 ms = 0.01 s. Use our calculator above for instant results.

Is the milliseconds to seconds conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert milliseconds to seconds offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between milliseconds and seconds?

Milliseconds (ms) and Seconds (s) are both units of time but belong to different measurement systems. 1 ms = 0.001 s. Use the converter above to switch between them instantly.

Milliseconds to Seconds (ms → s) — Free Online Converter

ms → s Reference Table

ms	s
0.001 ms	0.000001 s
0.002 ms	0.000002 s
0.003 ms	0.000003 s
0.004 ms	0.000004 s
0.005 ms	0.000005 s
0.006 ms	0.000006 s
0.007 ms	0.000007 s
0.008 ms	0.000008 s
0.009 ms	0.000009 s
0.01 ms	0.00001 s
0.02 ms	0.00002 s
0.03 ms	0.00003 s
0.04 ms	0.00004 s
0.05 ms	0.00005 s
0.06 ms	0.00006 s
0.07 ms	0.00007 s
0.08 ms	0.00008 s
0.09 ms	0.00009 s
0.1 ms	0.0001 s
0.2 ms	0.0002 s
0.3 ms	0.0003 s
0.4 ms	0.0004 s
0.5 ms	0.0005 s
0.6 ms	0.0006 s
0.7 ms	0.0007 s
0.8 ms	0.0008 s
0.9 ms	0.0009 s
1 ms	0.001 s
1.5 ms	0.0015 s
2 ms	0.002 s
2.5 ms	0.0025 s
3 ms	0.003 s
3.5 ms	0.0035 s
4 ms	0.004 s
4.5 ms	0.0045 s
5 ms	0.005 s
5.5 ms	0.0055 s
6 ms	0.006 s
6.5 ms	0.0065 s
7 ms	0.007 s
7.5 ms	0.0075 s
8 ms	0.008 s
8.5 ms	0.0085 s
9 ms	0.009 s
9.5 ms	0.0095 s
10 ms	0.01 s
11 ms	0.011 s
12 ms	0.012 s
13 ms	0.013 s
14 ms	0.014 s
15 ms	0.015 s
16 ms	0.016 s
17 ms	0.017 s
18 ms	0.018 s
19 ms	0.019 s
20 ms	0.02 s
25 ms	0.025 s
30 ms	0.03 s
35 ms	0.035 s
40 ms	0.04 s
45 ms	0.045 s
50 ms	0.05 s
55 ms	0.055 s
60 ms	0.06 s
65 ms	0.065 s
70 ms	0.07 s
75 ms	0.075 s
80 ms	0.08 s
85 ms	0.085 s
90 ms	0.09 s
95 ms	0.095 s
100 ms	0.1 s
120 ms	0.12 s
125 ms	0.125 s
130 ms	0.13 s
140 ms	0.14 s
150 ms	0.15 s
160 ms	0.16 s
175 ms	0.175 s
180 ms	0.18 s
200 ms	0.2 s
225 ms	0.225 s
250 ms	0.25 s
275 ms	0.275 s
300 ms	0.3 s
350 ms	0.35 s
400 ms	0.4 s
450 ms	0.45 s
500 ms	0.5 s
600 ms	0.6 s
700 ms	0.7 s
750 ms	0.75 s
800 ms	0.8 s
900 ms	0.9 s
1000 ms	1 s
1200 ms	1.2 s
1250 ms	1.25 s
1500 ms	1.5 s
1750 ms	1.75 s
2000 ms	2 s
2500 ms	2.5 s
3000 ms	3 s
4000 ms	4 s
4500 ms	4.5 s
5000 ms	5 s
6000 ms	6 s
7000 ms	7 s
7500 ms	7.5 s
8000 ms	8 s
9000 ms	9 s
10000 ms	10 s
15000 ms	15 s
20000 ms	20 s
25000 ms	25 s
50000 ms	50 s
75000 ms	75 s
100000 ms	100 s

Values based on NIST SP 811 conversion factors

Why Convert Milliseconds to Seconds?

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

Time conversion between ms and s 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 Milliseconds to Seconds

To convert milliseconds to seconds, use the following formula:

s = ms × 0.001

Example: 1 ms = 0.001 s

For example, 5 ms = 0.005 s, 10 ms = 0.01 s, and 100 ms = 0.1 s. For larger values, 1000 ms = 1 s. Conversely, 1 s = 1000 ms. 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 Millisecond?

A unit of time equal to 1/1000 of a second.

Used in sports timing and computing latency.

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.

Milliseconds → Seconds

Milliseconds to Seconds Formula