Femtosecond to Seconds
Convert Femtosecond to Seconds instantly. Free online time unit converter with exact formula, conversion table and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Length Converter
Convert metric, imperial, and nautical distance units.
Context values
Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
Results update instantly for Femtosecond to Seconds conversions.
Reserved above the conversion cards and below the converter.
Formula
seconds = femtosecond × 1.000000e-15
femtosecond = seconds × 1.000000e+15
Conversion table
| 1 fs | 1.000000e-15 s |
| 5 fs | 5.000000e-15 s |
| 10 fs | 1.000000e-14 s |
| 20 fs | 2.000000e-14 s |
| 50 fs | 5.000000e-14 s |
| 100 fs | 1.000000e-13 s |
| 500 fs | 5.000000e-13 s |
| 1000 fs | 1.000000e-12 s |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
What is the source unit in this conversion?
The source unit is the femtosecond (fs). Femtosecond is 1e-15 second units.
What is the destination unit in this conversion?
The destination unit is the seconds (s). The second is the SI base unit of time.
How do I convert femtosecond to seconds?
Multiply the femtosecond value by 1.000000e-15. For example, 10 fs × 1.000000e-15 = 1.000000e-14 s.
Is the femtosecond to seconds conversion exact?
Yes. The relationship between these units is a fixed mathematical or SI-defined ratio, so the conversion factor is exact rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in femtosecond needs to be compared with, or reported in, seconds, such as in engineering, scientific, or everyday calculations.
Can I convert seconds back to femtosecond?
Yes. Multiply the seconds value by 1.000000e+15 to get femtosecond.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
This page converts femtosecond (fs) to seconds (s) within the time converter.
Femtosecond is 1e-15 second units. The second is the SI base unit of time.
The formula is seconds = femtosecond × 1.000000e-15, based on each unit's fixed relationship to the time converter's base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common femtosecond values already converted to seconds.