Attomole is 1e-18 mole units.
Attomoles to Zeptomoles Converter — amol to zmol
Convert Attomole (amol) to Zeptomole (zmol) using the exact conversion factor (1 attomole = 1,000 zeptomole). See the formula, worked examples, and conversion table.
Attomoles 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-18 / 1e-21.
Amount units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attomoles to Zeptomoles
Attomole 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: Attomole is 1e-18 mole units, and zeptomole is 1e-21 mole units.
Formula
zeptomoles = attomoles × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 attomole equals 1e-18 base units, and 1 zeptomole equals 1e-21 base units, so dividing one by the other gives the direct attomole-to-zeptomole factor of 1000.
Simple example
1 amol × 1000 = 1,000 zmol
1 attomole = 1,000 zeptomoles.
Real-world example
100 amol × 1000 = 100,000 zmol
100 attomoles = 100,000 zeptomoles.
Conversion table
| Attomole (amol) | Zeptomole (zmol) |
|---|---|
| 0.001 amol | 1 zmol |
| 0.01 amol | 10 zmol |
| 0.1 amol | 100 zmol |
| 1 amol | 1,000 zmol |
| 10 amol | 10,000 zmol |
| 100 amol | 100,000 zmol |
Reverse conversion: Zeptomole to Attomole
1 zmol × 0.001 = 0.001 amol
1 zeptomole = 0.001 attomoles.
attomoles = zeptomoles × 0.001
For a page dedicated to this direction, see Zeptomole to Attomole.
Understanding the Attomole (amol)
Attomole is 1e-18 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 attomole?
1 attomole equals 1,000 zeptomoles, using the exact defined conversion factor rather than an estimate.
How do I convert attomole to zeptomole?
Multiply the attomole value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert zeptomole back to attomole?
Use the reverse factor: 1 zeptomole equals 0.001 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 zeptomole?
Zeptomole (zmol) is a unit of chemistry.
Is the attomole to zeptomole conversion exact?
Yes. Both attomole and zeptomole are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.