Attosecond is 1e-18 second units.
Attoseconds to Zeptoseconds Converter — as to zs
Convert Attosecond (as) to Zeptosecond (zs) using the exact conversion factor (1 attosecond = 1,000 zeptosecond). See the formula, worked examples, and conversion table.
Attoseconds to Zeptoseconds 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.
Zeptosecond is 1e-21 second units.
Result = input x 1e-18 / 1e-21.
Months and years use the average Gregorian year.
Reserved above the conversion cards and below the converter.
About Converting Attoseconds to Zeptoseconds
Attosecond and Zeptosecond 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 zeptosecond is 1e-21 second units.
Formula
zeptoseconds = attoseconds × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 attosecond equals 1e-18 base units, and 1 zeptosecond equals 1e-21 base units, so dividing one by the other gives the direct attosecond-to-zeptosecond factor of 1000.
Simple example
1 as × 1000 = 1,000 zs
1 attosecond = 1,000 zeptoseconds.
Real-world example
24 as × 1000 = 24,000 zs
24 attoseconds = 24,000 zeptoseconds.
Conversion table
| Attosecond (as) | Zeptosecond (zs) |
|---|---|
| 1 as | 1,000 zs |
| 7 as | 7,000 zs |
| 24 as | 24,000 zs |
| 30 as | 30,000 zs |
| 100 as | 100,000 zs |
| 365 as | 365,000 zs |
Reverse conversion: Zeptosecond to Attosecond
1 zs × 0.001 = 0.001 as
1 zeptosecond = 0.001 attoseconds.
attoseconds = zeptoseconds × 0.001
For a page dedicated to this direction, see Zeptosecond to Attosecond.
Understanding the Attosecond (as)
Attosecond is 1e-18 second units.
Understanding the Zeptosecond (zs)
Zeptosecond is 1e-21 second units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptoseconds are in 1 attosecond?
1 attosecond equals 1,000 zeptoseconds, using the exact defined conversion factor rather than an estimate.
How do I convert attosecond to zeptosecond?
Multiply the attosecond value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert zeptosecond back to attosecond?
Use the reverse factor: 1 zeptosecond equals 0.001 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 zeptosecond?
Zeptosecond (zs) is a unit of time.
Is the attosecond to zeptosecond conversion exact?
Yes. Both attosecond and zeptosecond are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.