Microsecond is 0.000001 second units.
Microseconds to Femtoseconds Converter — us to fs
Convert Microsecond (us) to Femtosecond (fs) using the exact conversion factor (1 microsecond = 1,000,000,000 femtosecond). See the formula, worked examples, and conversion table.
Microseconds to Femtoseconds 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.
Femtosecond is 1e-15 second units.
Result = input x 1e-6 / 1e-15.
Months and years use the average Gregorian year.
Reserved above the conversion cards and below the converter.
About Converting Microseconds to Femtoseconds
Microsecond 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: Microsecond is 0.000001 second units, and femtosecond is 1e-15 second units.
Formula
femtoseconds = microseconds × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 microsecond equals 0.000001 base units, and 1 femtosecond equals 1e-15 base units, so dividing one by the other gives the direct microsecond-to-femtosecond factor of 1000000000.
Simple example
1 us × 1000000000 = 1,000,000,000 fs
1 microsecond = 1,000,000,000 femtoseconds.
Real-world example
24 us × 1000000000 = 24,000,000,000 fs
24 microseconds = 24,000,000,000 femtoseconds.
Conversion table
| Microsecond (us) | Femtosecond (fs) |
|---|---|
| 1 us | 1,000,000,000 fs |
| 7 us | 7,000,000,000 fs |
| 24 us | 24,000,000,000 fs |
| 30 us | 30,000,000,000 fs |
| 100 us | 100,000,000,000 fs |
| 365 us | 365,000,000,000 fs |
Reverse conversion: Femtosecond to Microsecond
1 fs × 1e-9 = 1e-9 us
1 femtosecond = 1e-9 microseconds.
microseconds = femtoseconds × 1e-9
For a page dedicated to this direction, see Femtosecond to Microsecond.
Understanding the Microsecond (us)
Microsecond is 0.000001 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 microsecond?
1 microsecond equals 1,000,000,000 femtoseconds, using the exact defined conversion factor rather than an estimate.
How do I convert microsecond to femtosecond?
Multiply the microsecond value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert femtosecond back to microsecond?
Use the reverse factor: 1 femtosecond equals 1e-9 microseconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a microsecond?
Microsecond (us) is a unit of time.
What is a femtosecond?
Femtosecond (fs) is a unit of time.
Is the microsecond to femtosecond conversion exact?
Yes. Both microsecond and femtosecond are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.