Femtomole is 1e-15 mole units.
Femtomoles to Zeptomoles Converter — fmol to zmol
Convert Femtomole (fmol) to Zeptomole (zmol) using the exact conversion factor (1 femtomole = 1,000,000 zeptomole). See the formula, worked examples, and conversion table.
Femtomoles to Zeptomoles 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.
Zeptomole is 1e-21 mole units.
Result = input x 1e-15 / 1e-21.
Amount units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Femtomoles to Zeptomoles
Femtomole and Zeptomole 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: Femtomole is 1e-15 mole units, and zeptomole is 1e-21 mole units.
Formula
zeptomoles = femtomoles × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtomole equals 1e-15 base units, and 1 zeptomole equals 1e-21 base units, so dividing one by the other gives the direct femtomole-to-zeptomole factor of 1000000.
Simple example
1 fmol × 1000000 = 1,000,000 zmol
1 femtomole = 1,000,000 zeptomoles.
Real-world example
100 fmol × 1000000 = 100,000,000 zmol
100 femtomoles = 100,000,000 zeptomoles.
Conversion table
| Femtomole (fmol) | Zeptomole (zmol) |
|---|---|
| 0.001 fmol | 1,000 zmol |
| 0.01 fmol | 10,000 zmol |
| 0.1 fmol | 100,000 zmol |
| 1 fmol | 1,000,000 zmol |
| 10 fmol | 10,000,000 zmol |
| 100 fmol | 100,000,000 zmol |
Reverse conversion: Zeptomole to Femtomole
1 zmol × 1e-6 = 1e-6 fmol
1 zeptomole = 1e-6 femtomoles.
femtomoles = zeptomoles × 1e-6
For a page dedicated to this direction, see Zeptomole to Femtomole.
Understanding the Femtomole (fmol)
Femtomole is 1e-15 mole units.
Understanding the Zeptomole (zmol)
Zeptomole is 1e-21 mole units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptomoles are in 1 femtomole?
1 femtomole equals 1,000,000 zeptomoles, using the exact defined conversion factor rather than an estimate.
How do I convert femtomole to zeptomole?
Multiply the femtomole value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert zeptomole back to femtomole?
Use the reverse factor: 1 zeptomole equals 1e-6 femtomoles. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtomole?
Femtomole (fmol) is a unit of chemistry.
What is a zeptomole?
Zeptomole (zmol) is a unit of chemistry.
Is the femtomole to zeptomole conversion exact?
Yes. Both femtomole and zeptomole are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.