1 femtosecond
1 fsTime · definition
Time conversions use a Julian year of exactly 365.25 days.
Time
Just how long is 1 femtosecond?
Fleeting instants
1 fs
1 × 10⁻¹⁵ sseconds
2.7778 × 10⁻¹⁹ hhours
1.1574 × 10⁻²⁰ daysdays
3.1688 × 10⁻²³ yearsyears
01
1 femtosecond1 fsTime · definition
02
Atomic-scale transition1 fsTime · reference interval
Both timelines start together. Length measures elapsed time, not a physical distance.
A little perspective
1 femtosecond and Atomic-scale transition have approximately the same time.
Measurements, assumptions & sources +
Atomic-scale transition
A chosen femtosecond process interval; real transitions span many timescales.
Defined examples — our methodology
The marked time is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares time with time. The records below preserve each value’s basis and caveats.
Atomic-scale transition
1 fsTime · reference interval
A chosen femtosecond process interval; real transitions span many timescales.
- Comparing
- Time ↔ Time
- Relative size
- The two selected measurements are approximately equal.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Atomic-scale transition is labelled reference interval; treat the displayed value as a comparison anchor rather than false precision.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.