# Conversion from Second (s) to Nanosecond (ns) and vice versa

Updated on by Stefan Banse

Here you can convert the Time unit Second into the unit Nanosecond and vice versa you can convert Nanosecond into Second. By clicking the "Swap units" icon, you will always obtain the desired conversion in the calculation result, i.e., s to ns or ns 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 “nanosecond” can be traced back to the basic unit second. Therefore, 1 nanosecond corresponds to 0.000000001 seconds or 1 second corresponds to 1,000,000,000 nanoseconds. The prefix "nano" in the term nanosecond stands for one-billionth of the basic unit second.

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

For example, light travels around 0.3 meters in a nanosecond.

## Basis for conversion Second (s) to Nanosecond (ns) and vice versa

The abbreviation for the "Time unit Second" is s. The abbreviation for the "Time unit Nanosecond" is ns.

## Formula for the conversion of Second (s) to Nanosecond (ns) and vice versa

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

Conversion formula Second to Nanosecond

Determine the number of Nanosecond from Second

Second × 1000000000

## Formula for the conversion of Nanosecond (ns) to Second (s)

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

Conversion formula Nanosecond to Second

Determine the number of Second from Nanosecond

Nanosecond × 1.0E-9

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

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

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

Nanosecond ns ⇒ Second s

## Source information

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

## Last update on November 4, 2021

The pages of the "Time units" category were last editorially reviewed by Stefan Banse on November 4, 2021. They all correspond to the current status.

### Previous changes on April 24, 2021

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