Attomole is 1e-18 mole units.
Attomoles to Femtomoles Converter — amol to fmol
Convert Attomole (amol) to Femtomole (fmol) using the exact conversion factor (1 attomole = 0.001 femtomole). See the formula, worked examples, and conversion table.
Attomoles to Femtomoles converter
Converter
Chemistry Converter
Convert concentration, molarity, amount, and laboratory scientific units by compatible family.
Context values
Some unit families need one extra value for a physically accurate result.
Femtomole is 1e-15 mole units.
Result = input x 1e-18 / 1e-15.
Amount units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attomoles to Femtomoles
Attomole and Femtomole both measure mass concentration — how much of a substance is dissolved or dispersed in a given volume — a core calculation for preparing lab solutions, checking water quality against a regulatory limit, or formulating a pharmaceutical dose. Specifically: Attomole is 1e-18 mole units, and femtomole is 1e-15 mole units.
Formula
femtomoles = attomoles × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attomole equals 1e-18 base units, and 1 femtomole equals 1e-15 base units, so dividing one by the other gives the direct attomole-to-femtomole factor of 0.001.
Simple example
1 amol × 0.001 = 0.001 fmol
1 attomole = 0.001 femtomoles.
Real-world example
100 amol × 0.001 = 0.1 fmol
100 attomoles = 0.1 femtomoles.
Conversion table
| Attomole (amol) | Femtomole (fmol) |
|---|---|
| 0.001 amol | 0.000001 fmol |
| 0.01 amol | 0.00001 fmol |
| 0.1 amol | 0.0001 fmol |
| 1 amol | 0.001 fmol |
| 10 amol | 0.01 fmol |
| 100 amol | 0.1 fmol |
Reverse conversion: Femtomole to Attomole
0.001 fmol × 1000 = 1 amol
0.001 femtomoles = 1 attomole.
attomoles = femtomoles × 1000
For a page dedicated to this direction, see Femtomole to Attomole.
Understanding the Attomole (amol)
Attomole is 1e-18 mole units.
Understanding the Femtomole (fmol)
Femtomole is 1e-15 mole units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtomoles are in 1 attomole?
1 attomole equals 0.001 femtomoles, using the exact defined conversion factor rather than an estimate.
How do I convert attomole to femtomole?
Multiply the attomole value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtomole back to attomole?
Use the reverse factor: 1 femtomole equals 1,000 attomoles. You can also use the swap control in the converter above to flip the direction instantly.
What is a attomole?
Attomole (amol) is a unit of chemistry.
What is a femtomole?
Femtomole (fmol) is a unit of chemistry.
Is the attomole to femtomole conversion exact?
Yes. Both attomole and femtomole 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.
What's the difference between mass concentration and molarity?
Mass concentration expresses how much mass of a substance is present per unit volume (for example, grams per liter). Molarity expresses the amount in moles per liter instead, which accounts for the substance's molecular weight. This category converts mass-concentration units.