Nanoseconds to Seconds
An instant nanoseconds-to-seconds converter, with the formula and a reference table below.
| Nanoseconds | Seconds |
|---|---|
| 1 ns | 1e-09 s |
| 2 ns | 2e-09 s |
| 3 ns | 3e-09 s |
| 5 ns | 5e-09 s |
| 10 ns | 1e-08 s |
| 25 ns | 2.5e-08 s |
| 50 ns | 5e-08 s |
| 100 ns | 1e-07 s |
How to use
- Enter a value in the Nanoseconds field.
- The Seconds figure appears immediately — no button to press.
- Typing in the Seconds field converts back to Nanoseconds the same way.
- Use the reference table for the values that come up most often.
Nanoseconds to Seconds formula
The factor from nanoseconds to seconds is 1e-09.
s = ns × 1e-09
Why this factor: the nanosecond and the second are both defined against the second, so dividing one definition by the other gives 1e-09 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-09 — or use the Seconds to Nanoseconds converter, which is the same calculation reversed.
Worked example
Given 15 ns, multiplying by 1e-09 yields 1.5e-08 s.
15 ns × 1e-09 = 1.5e-08 s
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 second?
The second is the SI base unit of time and the most precisely realized unit in all of measurement.
Definition: Defined by fixing the caesium-133 hyperfine transition frequency at exactly 9,192,631,770 hertz — the basis of every atomic clock.
Where it is used: Universal, and the reference for all other time units.
Nanoseconds vs Seconds
The nanosecond is a metric unit while the second is an SI unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many seconds are in a nanosecond?
One nanosecond equals 1e-09 seconds.
What is the formula to convert nanoseconds to seconds?
Multiply the number of nanoseconds by 1e-09. To reverse it, divide by 1e-09 instead.
How do I convert seconds back to nanoseconds?
Divide by 1e-09, which is the same as multiplying by 1e+09.
How many seconds are in 10 nanoseconds?
10 ns works out to 1e-08 s.
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.