# Conversion from Second (s) to Millisecond (ms) and vice versa

Updated on by Stefan Banse

Here you can convert the Time unit Second into the unit Millisecond and vice versa you can convert Millisecond into Second. By clicking the "Swap units" icon, you will always obtain the desired conversion in the calculation result, i.e., s to ms or ms to s. With the following calculator you can also calculate any other Time unit.

The second (s) is the base unit of time in the International System of Units (SI). Therefore, the second is the physical unit of time measurement.

All other units of time are derived from the second (e.g., 1 minute = 60 seconds, 1 second = 1,000 milliseconds).

Until the middle of the 20th century, the second was defined as the sixtieth part of a minute of the day divided into 24 hours of 60 minutes. Since the rotation of the earth was assumed to be uniform, the length of a day and that of a second always appeared to be the same. It was not until 1934 that the long-held assumption that the Earth's rotation is not uniform was proven. As a result of magma displacements beneath the Earth's mantle and tidal friction, the Earth's rotation gradually slows down and thus the astronomical length of the day becomes longer. It turned out that the continuously improved quartz clocks provided a more consistent measure of time than the Earth's rotation. For this reason, a leap second is now added every 2 to 5 years to synchronise all clocks with the day, which always becomes a few fractions of a second longer.

Since 1967, the second has been defined as 9,192,631,770 times the period of a microwave, which resonates with a selected transition between two energy levels in the cesium atomic resonance. Therefore, it is called the atomic second Based on this definition. Atomic clocks are based on the exact measurement of this transition, and thus supersede quartz clocks in terms of accuracy.

The unit millisecond or thousandth of a second can be traced back to the basic unit second. Here, 1 millisecond corresponds to 0.001 seconds or 1 second corresponds to 1,000 milliseconds. The prefix "milli" in the term millisecond stands for one-thousandth of the base unit second.

This unit belongs to the International System of Units (SI).

For example, while an accuracy of a tenth of a second is sufficient for sprints in athletics to detect the difference between a few centimeters ahead, thousandths of a second in a car race in milliseconds are required to clearly determine the winner.

## Basis for conversion Second (s) to Millisecond (ms) and vice versa

The abbreviation for the "Time unit Second" is s. The abbreviation for the "Time unit Millisecond" is ms.

## Formula for the conversion of Second (s) to Millisecond (ms) and vice versa

The calculation from Second to Millisecond shall be made using the following conversion formula:

Conversion formula Second to Millisecond

Determine the number of Millisecond from Second

Second × 1000

## Formula for the conversion of Millisecond (ms) to Second (s)

The calculation from Millisecond to Second shall be made using the following conversion formula:

Conversion formula Millisecond to Second

Determine the number of Second from Millisecond

Millisecond × 0.001

## Overview table: How many Second are how many Millisecond?

Second s ⇒ Millisecond ms
0.01 s  are  10 ms
0.02 s  are  20 ms
0.03 s  are  30 ms
0.04 s  are  40 ms
0.05 s  are  50 ms
0.06 s  are  60 ms
0.07 s  are  70 ms
0.08 s  are  80 ms
0.09 s  are  90 ms
0.10 s  are  100 ms
0.20 s  are  200 ms
0.30 s  are  300 ms
0.40 s  are  400 ms
0.50 s  are  500 ms
0.60 s  are  600 ms
0.70 s  are  700 ms
0.80 s  are  800 ms
0.90 s  are  900 ms
1 s  corresponds to  1 000 ms
2 s  are  2 000 ms
3 s  are  3 000 ms
4 s  are  4 000 ms
5 s  are  5 000 ms
6 s  are  6 000 ms
7 s  are  7 000 ms
8 s  are  8 000 ms
9 s  are  9 000 ms
10 s  are  10 000 ms
20 s  are  20 000 ms
30 s  are  30 000 ms
40 s  are  40 000 ms
50 s  are  50 000 ms
60 s  are  60 000 ms
70 s  are  70 000 ms
80 s  are  80 000 ms
90 s  are  90 000 ms
100 s  are  100 000 ms
200 s  are  200 000 ms
300 s  are  300 000 ms
400 s  are  400 000 ms
500 s  are  500 000 ms
600 s  are  600 000 ms
700 s  are  700 000 ms
800 s  are  800 000 ms
900 s  are  900 000 ms
1 000 s  are  1 000 000 ms

## Overview table: How many Millisecond are how many Second?

Millisecond ms ⇒ Second s
0.01 ms  are  0.00001 s
0.02 ms  are  0.00002 s
0.03 ms  are  0.00003 s
0.04 ms  are  0.00004 s
0.05 ms  are  0.00005 s
0.06 ms  are  0.00006 s
0.07 ms  are  0.00007 s
0.08 ms  are  0.00008 s
0.09 ms  are  0.00009 s
0.10 ms  are  0.00010 s
0.20 ms  are  0.00020 s
0.30 ms  are  0.00030 s
0.40 ms  are  0.00040 s
0.50 ms  are  0.00050 s
0.60 ms  are  0.00060 s
0.70 ms  are  0.00070 s
0.80 ms  are  0.00080 s
0.90 ms  are  0.00090 s
1 ms  corresponds to  0.00100 s
2 ms  are  0.00200 s
3 ms  are  0.00300 s
4 ms  are  0.00400 s
5 ms  are  0.00500 s
6 ms  are  0.00600 s
7 ms  are  0.00700 s
8 ms  are  0.00800 s
9 ms  are  0.00900 s
10 ms  are  0.01000 s
20 ms  are  0.02000 s
30 ms  are  0.03000 s
40 ms  are  0.04000 s
50 ms  are  0.05000 s
60 ms  are  0.06000 s
70 ms  are  0.07000 s
80 ms  are  0.08000 s
90 ms  are  0.09000 s
100 ms  are  0.10000 s
200 ms  are  0.20000 s
300 ms  are  0.30000 s
400 ms  are  0.40000 s
500 ms  are  0.50000 s
600 ms  are  0.60000 s
700 ms  are  0.70000 s
800 ms  are  0.80000 s
900 ms  are  0.90000 s
1 000 ms  are  1 s

## Source information

As source for the information in the "Time units" category, we have used in particular:

## Last update on April 24, 2021

The last changes in the "Time units" category were implemented by Stefan Banse on April 24, 2021. The main changes were:

• April 24, 2021: Publication of the time units converter.
• Editorial revision of all texts in this category