Nanoseconds to Milliseconds
Type a value in either box to convert between nanoseconds and milliseconds. The factor is 1e-06.
| Nanoseconds | Milliseconds |
|---|---|
| 1 ns | 1e-06 ms |
| 2 ns | 2e-06 ms |
| 3 ns | 3e-06 ms |
| 5 ns | 5e-06 ms |
| 10 ns | 1e-05 ms |
| 25 ns | 2.5e-05 ms |
| 50 ns | 5e-05 ms |
| 100 ns | 0.0001 ms |
How to use
- Enter a value in the Nanoseconds field.
- The Milliseconds figure appears immediately — no button to press.
- Typing in the Milliseconds field converts back to Nanoseconds the same way.
- Use the reference table for the values that come up most often.
Nanoseconds to Milliseconds formula
Converting nanoseconds to milliseconds is a single multiplication by 1e-06.
ms = ns × 1e-06
Why this factor: the nanosecond and the millisecond are both defined against the second, so dividing one definition by the other gives 1e-06 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-06 — or use the Milliseconds to Nanoseconds converter, which is the same calculation reversed.
Worked example
Given 90 ns, multiplying by 1e-06 yields 9e-05 ms.
90 ns × 1e-06 = 9e-05 ms
The converter above does this for any value you type, in either direction.
What is a nanosecond?
A nanosecond is one billionth of a second — the timescale of digital electronics.
Definition: Exactly 1×10⁻⁹ second by SI prefix definition.
Where it is used: Processor and memory latency, network round trips, and high-frequency trading.
Worth knowing: Light travels almost exactly 30 cm in one nanosecond, which is why physical distance limits computer speed.
What is a millisecond?
A millisecond is one thousandth of a second, the unit of perceptible computing delay.
Definition: Exactly 0.001 second by SI prefix definition.
Where it is used: Network latency and ping times, audio buffer sizes, and animation and reaction timings.
Nanoseconds vs Milliseconds
The nanosecond and the millisecond belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many milliseconds are in a nanosecond?
One nanosecond equals 1e-06 milliseconds.
What is the formula to convert nanoseconds to milliseconds?
Multiply the number of nanoseconds by 1e-06. To reverse it, divide by 1e-06 instead.
How do I convert milliseconds back to nanoseconds?
Divide by 1e-06, which is the same as multiplying by 1000000.
How many milliseconds are in 10 nanoseconds?
10 ns works out to 1e-05 ms.
Is there anything to watch out for with nanoseconds?
Light travels almost exactly 30 cm in one nanosecond, which is why physical distance limits computer speed.
How is the nanosecond defined?
Exactly 1×10⁻⁹ second by SI prefix definition.