Femtoliter is 1e-15 liter units.
Femtoliters to Attoliters Converter — fL to aL
Convert Femtoliter (fL) to Attoliter (aL) using the exact conversion factor (1 femtoliter = 1,000 attoliter). See the formula, worked examples, and conversion table.
Femtoliters to Attoliters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
Attoliter is 1e-18 liter units.
Result = input x 1e-18 / 1e-21.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtoliters to Attoliters
Femtoliter and Attoliter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: Femtoliter is 1e-15 liter units, and attoliter is 1e-18 liter units.
Formula
attoliters = femtoliters × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtoliter equals 1e-18 base units, and 1 attoliter equals 1e-21 base units, so dividing one by the other gives the direct femtoliter-to-attoliter factor of 1000.
Simple example
1 fL × 1000 = 1,000 aL
1 femtoliter = 1,000 attoliters.
Real-world example
10 fL × 1000 = 10,000 aL
10 femtoliters = 10,000 attoliters.
Conversion table
| Femtoliter (fL) | Attoliter (aL) |
|---|---|
| 1 fL | 1,000 aL |
| 5 fL | 5,000 aL |
| 10 fL | 10,000 aL |
| 25 fL | 25,000 aL |
| 50 fL | 50,000 aL |
| 100 fL | 100,000 aL |
Reverse conversion: Attoliter to Femtoliter
1 aL × 0.001 = 0.001 fL
1 attoliter = 0.001 femtoliters.
femtoliters = attoliters × 0.001
For a page dedicated to this direction, see Attoliter to Femtoliter.
Understanding the Femtoliter (fL)
Femtoliter is 1e-15 liter units.
Understanding the Attoliter (aL)
Attoliter is 1e-18 liter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attoliters are in 1 femtoliter?
1 femtoliter equals 1,000 attoliters, using the exact defined conversion factor rather than an estimate.
How do I convert femtoliter to attoliter?
Multiply the femtoliter value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert attoliter back to femtoliter?
Use the reverse factor: 1 attoliter equals 0.001 femtoliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtoliter?
Femtoliter (fL) is a unit of volume.
What is a attoliter?
Attoliter (aL) is a unit of volume.
Is the femtoliter to attoliter conversion exact?
Yes. Both femtoliter and attoliter are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.