Attoliter is 1e-18 liter units.
Attoliters to Femtoliters Converter — aL to fL
Convert Attoliter (aL) to Femtoliter (fL) using the exact conversion factor (1 attoliter = 0.001 femtoliter). See the formula, worked examples, and conversion table.
Attoliters to Femtoliters 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.
Femtoliter is 1e-15 liter units.
Result = input x 1e-21 / 1e-18.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attoliters to Femtoliters
Attoliter and Femtoliter 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: Attoliter is 1e-18 liter units, and femtoliter is 1e-15 liter units.
Formula
femtoliters = attoliters × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attoliter equals 1e-21 base units, and 1 femtoliter equals 1e-18 base units, so dividing one by the other gives the direct attoliter-to-femtoliter factor of 0.001.
Simple example
1 aL × 0.001 = 0.001 fL
1 attoliter = 0.001 femtoliters.
Real-world example
10 aL × 0.001 = 0.01 fL
10 attoliters = 0.01 femtoliters.
Conversion table
| Attoliter (aL) | Femtoliter (fL) |
|---|---|
| 1 aL | 0.001 fL |
| 5 aL | 0.005 fL |
| 10 aL | 0.01 fL |
| 25 aL | 0.025 fL |
| 50 aL | 0.05 fL |
| 100 aL | 0.1 fL |
Reverse conversion: Femtoliter to Attoliter
0.001 fL × 1000 = 1 aL
0.001 femtoliters = 1 attoliter.
attoliters = femtoliters × 1000
For a page dedicated to this direction, see Femtoliter to Attoliter.
Understanding the Attoliter (aL)
Attoliter is 1e-18 liter units.
Understanding the Femtoliter (fL)
Femtoliter is 1e-15 liter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtoliters are in 1 attoliter?
1 attoliter equals 0.001 femtoliters, using the exact defined conversion factor rather than an estimate.
How do I convert attoliter to femtoliter?
Multiply the attoliter value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtoliter back to attoliter?
Use the reverse factor: 1 femtoliter equals 1,000 attoliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a attoliter?
Attoliter (aL) is a unit of volume.
What is a femtoliter?
Femtoliter (fL) is a unit of volume.
Is the attoliter to femtoliter conversion exact?
Yes. Both attoliter and femtoliter are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.