Molarity & mass
Mass, concentration, volume or amount from molecular weight.
What this calculator does
Calculate mass, concentration, volume or amount of substance from molecular weight with n = m / MW and C = n / V for preparing solutions.
Calculation model
n = m / MW; C = n / V
Formulas
- F03 · Mass / molarity:
n = m / MW;C = m / (MW · V);m = C · MW · V
Assumptions
- Molecular weight is that of the form actually weighed (e.g. including hydrate water).
- Final volume is the solution volume, not the solvent volume added.
Verification status
- tests-passed means automated algorithm tests (unit, property, integration and browser end-to-end) pass. It is not an independent scientific review and not laboratory validation.
References
- [S01] NEB: NEBioCalculator (DNA, ligation, OD260, dilution and molarity calculators) (accessed 2026-10-29)
- [S02] NEB: NEBuilder HiFi DNA Assembly reaction protocol / instruction manual (650 g/mol/bp approximation) (accessed 2026-10-29)
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