Zeptoliter is 1e-21 liter units.
Zeptoliters to Femtoliters Converter — zL to fL
Convert Zeptoliter (zL) to Femtoliter (fL) using the exact conversion factor (1 zeptoliter = 0.000001 femtoliter). See the formula, worked examples, and conversion table.
Zeptoliters 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-24 / 1e-18.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptoliters to Femtoliters
Zeptoliter 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: Zeptoliter is 1e-21 liter units, and femtoliter is 1e-15 liter units.
Formula
femtoliters = zeptoliters × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptoliter equals 1e-24 base units, and 1 femtoliter equals 1e-18 base units, so dividing one by the other gives the direct zeptoliter-to-femtoliter factor of 0.000001.
Simple example
1 zL × 0.000001 = 0.000001 fL
1 zeptoliter = 0.000001 femtoliters.
Real-world example
10 zL × 0.000001 = 0.00001 fL
10 zeptoliters = 0.00001 femtoliters.
Conversion table
| Zeptoliter (zL) | Femtoliter (fL) |
|---|---|
| 1 zL | 0.000001 fL |
| 5 zL | 0.000005 fL |
| 10 zL | 0.00001 fL |
| 25 zL | 0.000025 fL |
| 50 zL | 0.00005 fL |
| 100 zL | 0.0001 fL |
Reverse conversion: Femtoliter to Zeptoliter
0.000001 fL × 1000000 = 1 zL
0.000001 femtoliters = 1 zeptoliters.
zeptoliters = femtoliters × 1000000
For a page dedicated to this direction, see Femtoliter to Zeptoliter.
Understanding the Zeptoliter (zL)
Zeptoliter is 1e-21 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 zeptoliter?
1 zeptoliter equals 0.000001 femtoliters, using the exact defined conversion factor rather than an estimate.
How do I convert zeptoliter to femtoliter?
Multiply the zeptoliter value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert femtoliter back to zeptoliter?
Use the reverse factor: 1 femtoliter equals 1,000,000 zeptoliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptoliter?
Zeptoliter (zL) is a unit of volume.
What is a femtoliter?
Femtoliter (fL) is a unit of volume.
Is the zeptoliter to femtoliter conversion exact?
Yes. Both zeptoliter and femtoliter are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.