Molarity Calculator
Calculate any variable in the molarity equation: M = n / V, where M is molarity (mol/L), n is moles of solute, and V is volume of solution in liters. Enter any two values to solve for the third.
Result
Molarity Formula Reference
| Variable | Formula | Units |
|---|---|---|
| Molarity (M) | M = n / V | mol/L (molar) |
| Moles (n) | n = M × V | mol |
| Volume (V) | V = n / M | L |
| Mass (m) | m = n × Mr | g |
Common molar masses: NaCl = 58.44 g/mol, H2O = 18.02 g/mol, NaOH = 40.00 g/mol, HCl = 36.46 g/mol, glucose (C6H12O6) = 180.16 g/mol.
References & Methodology
- IUPAC Compendium of Chemical Terminology (Gold Book) — Authoritative definition of molarity (amount-of-substance concentration), SI units, and solution preparation standards.
- Atkins, P. & de Paula, J. — Physical Chemistry (10th ed., Oxford University Press) — Standard reference for solution chemistry, concentration expressions, and unit conversions.
- National Institute of Standards and Technology (NIST) Chemistry WebBook — Reference molar masses and physical constants for common compounds.