To convert femtoseconds to seconds, multiply the value by 1 × 10⁻¹⁵. To go the other way, multiply seconds by 1,000,000,000,000,000 to get femtoseconds.
| Femtoseconds (fs) | Seconds (s) |
|---|---|
| 1 fs | 1 × 10⁻¹⁵ s |
| 5 fs | 5 × 10⁻¹⁵ s |
| 10 fs | 1 × 10⁻¹⁴ s |
| 25 fs | 2.5 × 10⁻¹⁴ s |
| 50 fs | 5 × 10⁻¹⁴ s |
| 100 fs | 1 × 10⁻¹³ s |
| 250 fs | 2.5 × 10⁻¹³ s |
| 500 fs | 5 × 10⁻¹³ s |
| 1,000 fs | 1 × 10⁻¹² s |
| 2,500 fs | 2.5 × 10⁻¹² s |
| 5,000 fs | 5 × 10⁻¹² s |
| 10,000 fs | 1 × 10⁻¹¹ s |
| 100,000 fs | 1 × 10⁻¹⁰ s |
| 1,000,000 fs | 1 × 10⁻⁹ s |
Femtosecond (fs). A femtosecond is 10⁻¹⁵ of a second, the scale of laser pulses and chemical reactions.
Second (s). The second is the SI base unit of time, defined by the caesium-133 atom.
There are 1 × 10⁻¹⁵ seconds in one femtosecond.
Multiply the number of femtoseconds by 1 × 10⁻¹⁵. For example, 10 femtoseconds equal 1 × 10⁻¹⁴ seconds.
One second equals 1,000,000,000,000,000 femtoseconds.
1 × 10⁻¹² seconds. Other common values: 100 femtoseconds = 1 × 10⁻¹³ seconds and 10,000 femtoseconds = 1 × 10⁻¹¹ seconds.