Yoctosecond is 1e-24 second units.
Yoctoseconds to Femtoseconds Converter — ys to fs
Convert Yoctosecond (ys) to Femtosecond (fs) using the exact conversion factor (1 yoctosecond = 1e-9 femtosecond). See the formula, worked examples, and conversion table.
Yoctoseconds to Femtoseconds converter
Converter
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Convert SI time, civil time, historical durations, months, and years.
Context values
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Femtosecond is 1e-15 second units.
Result = input x 1e-24 / 1e-15.
Months and years use the average Gregorian year.
Reserved above the conversion cards and below the converter.
About Converting Yoctoseconds to Femtoseconds
Yoctosecond and Femtosecond 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: Yoctosecond is 1e-24 second units, and femtosecond is 1e-15 second units.
Formula
femtoseconds = yoctoseconds × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctosecond equals 1e-24 base units, and 1 femtosecond equals 1e-15 base units, so dividing one by the other gives the direct yoctosecond-to-femtosecond factor of 1e-9.
Simple example
1 ys × 1e-9 = 1e-9 fs
1 yoctosecond = 1e-9 femtoseconds.
Real-world example
24 ys × 1e-9 = 2.4e-8 fs
24 yoctoseconds = 2.4e-8 femtoseconds.
Conversion table
| Yoctosecond (ys) | Femtosecond (fs) |
|---|---|
| 1 ys | 1e-9 fs |
| 7 ys | 7e-9 fs |
| 24 ys | 2.4e-8 fs |
| 30 ys | 3e-8 fs |
| 100 ys | 1e-7 fs |
| 365 ys | 3.65e-7 fs |
Reverse conversion: Femtosecond to Yoctosecond
1e-9 fs × 1000000000 = 1 ys
1e-9 femtoseconds = 1 yoctoseconds.
yoctoseconds = femtoseconds × 1000000000
For a page dedicated to this direction, see Femtosecond to Yoctosecond.
Understanding the Yoctosecond (ys)
Yoctosecond is 1e-24 second units.
Understanding the Femtosecond (fs)
Femtosecond is 1e-15 second units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtoseconds are in 1 yoctosecond?
1 yoctosecond equals 1e-9 femtoseconds, using the exact defined conversion factor rather than an estimate.
How do I convert yoctosecond to femtosecond?
Multiply the yoctosecond value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert femtosecond back to yoctosecond?
Use the reverse factor: 1 femtosecond equals 1,000,000,000 yoctoseconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctosecond?
Yoctosecond (ys) is a unit of time.
What is a femtosecond?
Femtosecond (fs) is a unit of time.
Is the yoctosecond to femtosecond conversion exact?
Yes. Both yoctosecond and femtosecond 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.