Quick reference table
Common molar concentration conversions
| From | To |
|---|---|
| 1 mol/L | 1,000 mmol/L |
| 1 mmol/L | 1 µmol/L |
| 1 mol/m³ | 0.001 mol/L |
| 1 M | 1,000 mM |
How to convert molar concentration
Molar concentration (molarity) is the amount of substance per volume. Chemistry uses mol/L (written M), and blood tests often use mmol/L.
Every molar concentration unit is a fixed multiple of one base unit, the mol/m³. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert mol/L to mmol/L, multiply by 1,000. To go the other way, divide by 1,000.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Moles per liter to Millimoles per liter
| Moles per liter (mol/L) | Millimoles per liter (mmol/L) |
|---|---|
| 1 mol/L | 1,000 mmol/L |
| 2 mol/L | 2,000 mmol/L |
| 5 mol/L | 5,000 mmol/L |
| 10 mol/L | 10,000 mmol/L |
| 25 mol/L | 25,000 mmol/L |
| 50 mol/L | 50,000 mmol/L |
| 100 mol/L | 100,000 mmol/L |
| 1,000 mol/L | 1,000,000 mmol/L |
Millimoles per liter to Micromoles per liter
| Millimoles per liter (mmol/L) | Micromoles per liter (µmol/L) |
|---|---|
| 1 mmol/L | 1 µmol/L |
| 2 mmol/L | 2 µmol/L |
| 5 mmol/L | 5 µmol/L |
| 10 mmol/L | 1 µmol/L |
| 25 mmol/L | 25 µmol/L |
| 50 mmol/L | 5 µmol/L |
| 100 mmol/L | 1 µmol/L |
| 1,000 mmol/L | 1 µmol/L |
Molar concentration units explained
| Unit | Symbol | Equals |
|---|---|---|
| Moles per cubic meter | mol/m³ | 1 mol/m³ = 1 mol/m³ |
| Millimoles per liter | mmol/L | 1 mmol/L = 1 mol/m³ |
| Moles per liter | mol/L | 1 mol/L = 1,000 mol/m³ |
| Micromoles per liter | µmol/L | 1 µmol/L = 0.001 mol/m³ |
| Kilomoles per cubic meter | kmol/m³ | 1 kmol/m³ = 1,000 mol/m³ |
| Nanomoles per liter | nmol/L | 1 nmol/L = 0.000001 mol/m³ |
| Molar | M | 1 M = 1,000 mol/m³ |
| Millimolar | mM | 1 mM = 1 mol/m³ |
| Micromolar | µM | 1 µM = 0.001 mol/m³ |
Popular conversions: mol/l to mmol/l, molarity conversion.
Frequently asked questions
How many mmol/L is 1 mol/L?
One mole per liter is 1,000 millimoles per liter.
How do I convert mol/L to mmol/L?
Multiply the value in mol/L by 1,000 to get mmol/L. For example, 10 mol/L = 10,000 mmol/L.
How many mmol/L is 1 mol/L?
1 mol/L = 1,000 mmol/L, and 1 mmol/L = 0.001 mol/L.
Does this molar concentration converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.