Femtoseconds to Nanoseconds Converter
Enter the time in femtoseconds below to convert it to nanoseconds.
Convert Femtoseconds to Nanoseconds
Enter a value in femtoseconds (fs) to convert to nanoseconds (ns).
Femtosecond to Nanosecond Conversion Table
Table showing various femtosecond measurements converted to nanoseconds. Click any preset value or arrow to load it into the converter.
| Femtoseconds (fs) | Nanoseconds (ns) |
|---|---|
| 1 fs | 0.000001 ns |
| 10 fs | 0.00001 ns |
| 100 fs | 0.0001 ns |
| 1,000 fs | 0.001 ns |
| 10,000 fs | 0.01 ns |
| 100,000 fs | 0.1 ns |
| 1,000,000 fs | 1 ns |
| 5,000,000 fs | 5 ns |
| 10,000,000 fs | 10 ns |
| 25,400,000 fs | 25.4 ns |
How to Convert Femtoseconds to Nanoseconds
To convert femtoseconds to nanoseconds, multiply the time by the following conversion ratio: 0.000001 nanoseconds/femtosecond.
Since one femtosecond is equal to 0.000001 nanoseconds, you can use this simple formula to convert:
The time in nanoseconds is equal to the time in femtoseconds multiplied by 0.000001.
For example, here's how to convert 5 femtoseconds to nanoseconds using the formula above.
How Many Nanoseconds Are in a Femtosecond?
There are 0.000001 nanoseconds in a femtosecond, which is why we use this value in the formula above.
Our femtosecond to nanosecond calculator automatically converts your time measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Femtoseconds and nanoseconds are both units used to measure time. Keep reading to learn more about each unit.
What Is a Femtosecond?
A femtosecond is a unit of time equal to 1e-15 seconds (s), the base unit for time. One-quadrillionth of a second (10⁻¹⁵ s), used in ultrafast laser physics. [1]
The femtosecond is classified as a metric and SI-compatible unit of time. Femtoseconds can be abbreviated as fs; for example, 1 femtosecond can be written as 1 fs.
In the metric system, "femto" is the standard SI prefix for quadrillionths, or 10⁻¹⁵. This makes the femtosecond (fs) a convenient decimal multiple of the second (s).
In practice, femtoseconds (fs) 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 femtoseconds (fs) and nanoseconds (ns), keep full floating-point precision (1 fs = 0.000001 ns; 1 ns = 1,000,000 fs) during intermediate calculations and round only the final nanosecond figure to match your instrument tolerance.
More Femtosecond & Nanosecond Conversions
Need to calculate in the opposite direction? Use our nanoseconds to femtoseconds calculator to switch your starting unit immediately. You can also explore related tools such as converting nanoseconds to femtoseconds, converting seconds to minutes, or converting seconds to milliseconds.
Convert from Femtoseconds
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Time)·Time Metrology Standard — Femtoseconds (fs) to Nanoseconds (ns)
- [2]BIPM SpecificationBIPM (SI Base Unit: Second (s))·Unit Specifications: Femtosecond (fs) & Nanosecond (ns)
- [3]NIST CUU ReferenceNIST CUU (Non-SI Units Accepted for Use (min, h, d))·Conversion Factors & Mathematical Basis (fs to ns)