Mole is the SI amount of substance unit.
Moles to Examoles Converter — mol to Emol
Convert Mole (mol) to Examole (Emol) using the exact conversion factor (1 mole = 1e-18 examole). See the formula, worked examples, conversion table, history, and common uses.
Moles to Examoles 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.
Examole is 1000000000000000000 mole units.
Result = input x 1 / 1e+18.
Amount units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Moles to Examoles
Mole and Examole 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. Mole is most often used for chemical reaction stoichiometry.
Formula
examoles = moles × 1e-18
This factor comes from each unit's defined relationship to the category's base unit: 1 mole equals 1 base unit, and 1 examole equals 1e+18 base units, so dividing one by the other gives the direct mole-to-examole factor of 1e-18.
Simple example
1 mol × 1e-18 = 1e-18 Emol
1 mole = 1e-18 examoles.
Real-world example
100 mol × 1e-18 = 1e-16 Emol
100 moles = 1e-16 examoles.
Conversion table
| Mole (mol) | Examole (Emol) |
|---|---|
| 0.001 mol | 1e-21 Emol |
| 0.01 mol | 1e-20 Emol |
| 0.1 mol | 1e-19 Emol |
| 1 mol | 1e-18 Emol |
| 10 mol | 1e-17 Emol |
| 100 mol | 1e-16 Emol |
Reverse conversion: Examole to Mole
1e-18 Emol × 1e+18 = 1 mol
1e-18 examoles = 1 mole.
moles = examoles × 1e+18
For a page dedicated to this direction, see Examole to Mole.
Understanding the Mole
Mole (mol) measures amount of substance. The SI base unit of amount of substance, defined since 2019 by fixing the Avogadro constant at exactly 6.02214076 × 10²³ per mole. It is classified as a SI base unit.
Where it's used: Universal — SI base unit used worldwide
Uses of the Mole today
- Chemical reaction stoichiometry
- Solution concentration (molarity) calculations
- Gas law calculations in chemistry and physics
History of the Mole
The mole was introduced as a practical chemistry unit in the early 20th century and adopted as an SI base unit in 1971. It was originally defined via the number of atoms in 12 grams of carbon-12; the 2019 SI redefinition instead fixed the Avogadro constant to an exact value, so the mole no longer depends on a physical reference sample.
Historical origin. Mole was not the invention of a single named person; it developed through the process described above.
Understanding the Examole (Emol)
Examole is 1000000000000000000 mole units.
Mole — sources
- BIPM SI Brochure, 9th edition — Official definition of the mole via the fixed Avogadro constant.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many examoles are in 1 mole?
1 mole equals 1e-18 examoles, using the exact defined conversion factor rather than an estimate.
How do I convert mole to examole?
Multiply the mole value by 1e-18. The converter above does this instantly to whatever precision you set.
How do I convert examole back to mole?
Use the reverse factor: 1 examole equals 1e+18 moles. You can also use the swap control in the converter above to flip the direction instantly.
What is a mole?
Mole (mol) measures amount of substance. The SI base unit of amount of substance, defined since 2019 by fixing the Avogadro constant at exactly 6.02214076 × 10²³ per mole. It is classified as a SI base unit.
What is a examole?
Examole (Emol) is a unit of chemistry.
Is the mole to examole conversion exact?
Yes. The SI base unit of amount of substance, defined since 2019 by fixing the Avogadro constant at exactly 6.02214076 × 10²³ per mole. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the mole still used today?
Universal — SI base unit used worldwide
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.