Seconds to Nanoseconds Converter
Enter the time in seconds below to convert it to nanoseconds.
Convert Seconds to Nanoseconds
Enter a value in seconds (s) to convert to nanoseconds (ns).
Second to Nanosecond Conversion Table
Table showing various second measurements converted to nanoseconds. Click any preset value or arrow to load it into the converter.
How to Convert Seconds to Nanoseconds
To convert seconds to nanoseconds, multiply the time by the following conversion ratio: 999,999,999.9999999 nanoseconds/second.
Since one second is equal to 999,999,999.9999999 nanoseconds, you can use this simple formula to convert:
The time in nanoseconds is equal to the time in seconds multiplied by 999,999,999.9999999.
For example, here's how to convert 5 seconds to nanoseconds using the formula above.
How Many Nanoseconds Are in a Second?
There are 999,999,999.9999999 nanoseconds in a second, which is why we use this value in the formula above.
Our second to nanosecond calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Seconds and nanoseconds are both units used to measure time. Keep reading to learn more about each unit.
What Is a Second?
Base SI unit of time. It serves as a primary reference unit for measuring time across scientific and practical applications. [1]
The second is classified as an International System of Units (SI) unit of time. Seconds can be abbreviated as s; for example, 1 second can be written as 1 s.
As the primary coherent reference unit for time in this category, all other time units are mathematically anchored to the second (s).
In practice, seconds (s) are widely used across standard time applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Nanosecond?
A nanosecond is a unit of time equal to 1/1,000,000,000 of a second (1e-9 s). One-billionth of a second (10⁻⁹ s), used in RAM and CPU clock cycles. [2]
The nanosecond is classified as a metric and SI-compatible unit of time. Nanoseconds can be abbreviated as ns; for example, 1 nanosecond can be written as 1 ns.
In the metric system, "nano" is the standard SI prefix for billionths, or 10⁻⁹. This makes the nanosecond (ns) a convenient decimal multiple of the second (s).
In practice, nanoseconds (ns) are widely used across fine-tolerance laboratory, analytical, and micro-scale time measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting time between seconds (s) and nanoseconds (ns), keep full floating-point precision (1 s = 999,999,999.9999999 ns; 1 ns = 1e-9 s) during intermediate calculations and round only the final nanosecond figure to match your instrument tolerance.
More Second & Nanosecond Conversions
Need to calculate in the opposite direction? Use our nanoseconds to seconds calculator to switch your starting unit immediately. You can also explore related tools such as converting nanoseconds to seconds, converting seconds to minutes, or converting seconds to milliseconds.
Convert from Seconds
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Seconds (s) to Nanoseconds (ns)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Second (s) & Nanosecond (ns)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (s to ns)