Milliseconds to Nanoseconds Converter
Enter the time in milliseconds below to convert it to nanoseconds.
Convert Milliseconds to Nanoseconds
Enter a value in milliseconds (ms) to convert to nanoseconds (ns).
Millisecond to Nanosecond Conversion Table
Table showing various millisecond measurements converted to nanoseconds. Click any preset value or arrow to load it into the converter.
How to Convert Milliseconds to Nanoseconds
To convert milliseconds to nanoseconds, multiply the time by the following conversion ratio: 1,000,000 nanoseconds/millisecond.
Since one millisecond is equal to 1,000,000 nanoseconds, you can use this simple formula to convert:
The time in nanoseconds is equal to the time in milliseconds multiplied by 1,000,000.
For example, here's how to convert 5 milliseconds to nanoseconds using the formula above.
How Many Nanoseconds Are in a Millisecond?
There are 1,000,000 nanoseconds in a millisecond, which is why we use this value in the formula above.
Our millisecond to nanosecond calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliseconds and nanoseconds are both units used to measure time. Keep reading to learn more about each unit.
What Is a Millisecond?
A millisecond is a unit of time equal to 1/1,000 of a second (0.001 s). One-thousandth of a second (10⁻³ s). [1]
The millisecond is classified as a metric and SI-compatible unit of time. Milliseconds can be abbreviated as ms; for example, 1 millisecond can be written as 1 ms.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millisecond (ms) a convenient decimal multiple of the second (s).
In practice, milliseconds (ms) are widely used across fine-tolerance laboratory, analytical, and micro-scale time measurements within SI metric 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 milliseconds (ms) and nanoseconds (ns), keep full floating-point precision (1 ms = 1,000,000 ns; 1 ns = 0.000001 ms) during intermediate calculations and round only the final nanosecond figure to match your instrument tolerance.
More Millisecond & Nanosecond Conversions
Need to calculate in the opposite direction? Use our nanoseconds to milliseconds calculator to switch your starting unit immediately. You can also explore related tools such as converting nanoseconds to milliseconds, converting milliseconds to seconds, or converting seconds to minutes.
Convert from Milliseconds
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Milliseconds (ms) to Nanoseconds (ns)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Millisecond (ms) & Nanosecond (ns)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (ms to ns)