Molarity Calculator
Molar concentration of a solution from the mass of solute, its molar mass and the volume.
Results
Concentration
1.00000
mol/L
Amount of substance
1.00000
mol
Concentration
58.4400
g/L
What this tool does
Molarity counts particles rather than grams, which is what chemical reactions actually care about. The defaults use sodium chloride, whose molar mass of 58.44 g/mol makes one gram-per-litre solution conveniently close to one millimolar.
Formula
c = m ÷ (M × V)
Variables
| Symbol | Meaning | Unit |
|---|---|---|
m | Mass of solute | g |
mm | Molar mass | g/mol |
v | Volume of solution | L |
C | Concentration | mol/L |
N | Amount of substance | mol |
GL | Concentration | g/L |
Worked example
- Mass of solute58.44 g
- Molar mass58.44 g/mol
- Volume of solution1 L
- Concentration1.00000 mol/L
- Amount of substance1.00000 mol
- Concentration58.4400 g/L
Limitations
- Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.