Attosecond is 1e-18 second units.
Attoseconds to Nanoseconds Converter — as to ns
Convert Attosecond (as) to Nanosecond (ns) using the exact conversion factor (1 attosecond = 1e-9 nanosecond). See the formula, worked examples, and conversion table.
Attoseconds to Nanoseconds converter
Converter
Time Converter
Convert SI time, civil time, historical durations, months, and years.
Context values
Some unit families need one extra value for a physically accurate result.
Nanosecond is 1e-9 second units.
Result = input x 1e-18 / 1e-9.
Months and years use the average Gregorian year.
Reserved above the conversion cards and below the converter.
About Converting Attoseconds to Nanoseconds
Attosecond and Nanosecond are both everyday units of duration, and converting between them is one of the most routine calculations there is — scheduling, project planning, and billing all depend on it. Specifically: Attosecond is 1e-18 second units, and nanosecond is 1e-9 second units.
Formula
nanoseconds = attoseconds × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 attosecond equals 1e-18 base units, and 1 nanosecond equals 1e-9 base units, so dividing one by the other gives the direct attosecond-to-nanosecond factor of 1e-9.
Simple example
1 as × 1e-9 = 1e-9 ns
1 attosecond = 1e-9 nanoseconds.
Real-world example
24 as × 1e-9 = 2.4e-8 ns
24 attoseconds = 2.4e-8 nanoseconds.
Conversion table
| Attosecond (as) | Nanosecond (ns) |
|---|---|
| 1 as | 1e-9 ns |
| 7 as | 7e-9 ns |
| 24 as | 2.4e-8 ns |
| 30 as | 3e-8 ns |
| 100 as | 1e-7 ns |
| 365 as | 3.65e-7 ns |
Reverse conversion: Nanosecond to Attosecond
1e-9 ns × 1000000000 = 1 as
1e-9 nanoseconds = 1 attosecond.
attoseconds = nanoseconds × 1000000000
For a page dedicated to this direction, see Nanosecond to Attosecond.
Understanding the Attosecond (as)
Attosecond is 1e-18 second units.
Understanding the Nanosecond (ns)
Nanosecond is 1e-9 second units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanoseconds are in 1 attosecond?
1 attosecond equals 1e-9 nanoseconds, using the exact defined conversion factor rather than an estimate.
How do I convert attosecond to nanosecond?
Multiply the attosecond value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert nanosecond back to attosecond?
Use the reverse factor: 1 nanosecond equals 1,000,000,000 attoseconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a attosecond?
Attosecond (as) is a unit of time.
What is a nanosecond?
Nanosecond (ns) is a unit of time.
Is the attosecond to nanosecond conversion exact?
Yes. Both attosecond and nanosecond are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 used above is exact to as many digits as you choose to display.