Femtoliter is 1e-15 liter units.
Femtoliters to Rontoliters Converter — fL to rL
Convert Femtoliter (fL) to Rontoliter (rL) using the exact conversion factor (1 femtoliter = 1e+12 rontoliter). See the formula, worked examples, and conversion table.
Femtoliters to Rontoliters 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.
Rontoliter is 1e-27 liter units.
Result = input x 1e-18 / 1e-30.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtoliters to Rontoliters
Femtoliter and Rontoliter 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 rontoliter is 1e-27 liter units.
Formula
rontoliters = femtoliters × 1e+12
This factor comes from each unit's defined relationship to the category's base unit: 1 femtoliter equals 1e-18 base units, and 1 rontoliter equals 1e-30 base units, so dividing one by the other gives the direct femtoliter-to-rontoliter factor of 1e+12.
Simple example
1 fL × 1e+12 = 1e+12 rL
1 femtoliter = 1e+12 rontoliters.
Real-world example
10 fL × 1e+12 = 1e+13 rL
10 femtoliters = 1e+13 rontoliters.
Conversion table
| Femtoliter (fL) | Rontoliter (rL) |
|---|---|
| 1 fL | 1e+12 rL |
| 5 fL | 5e+12 rL |
| 10 fL | 1e+13 rL |
| 25 fL | 2.5e+13 rL |
| 50 fL | 5e+13 rL |
| 100 fL | 1e+14 rL |
Reverse conversion: Rontoliter to Femtoliter
1e+12 rL × 1e-12 = 1 fL
1e+12 rontoliters = 1 femtoliter.
femtoliters = rontoliters × 1e-12
For a page dedicated to this direction, see Rontoliter to Femtoliter.
Understanding the Femtoliter (fL)
Femtoliter is 1e-15 liter units.
Understanding the Rontoliter (rL)
Rontoliter is 1e-27 liter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many rontoliters are in 1 femtoliter?
1 femtoliter equals 1e+12 rontoliters, using the exact defined conversion factor rather than an estimate.
How do I convert femtoliter to rontoliter?
Multiply the femtoliter value by 1e+12. The converter above does this instantly to whatever precision you set.
How do I convert rontoliter back to femtoliter?
Use the reverse factor: 1 rontoliter equals 1e-12 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 rontoliter?
Rontoliter (rL) is a unit of volume.
Is the femtoliter to rontoliter conversion exact?
Yes. Both femtoliter and rontoliter are defined by fixed standards rather than physical artifacts, so the factor of 1e+12 used above is exact to as many digits as you choose to display.