Worked example
For NaCl at 58.44 g/mol, a 100 mM solution with a final volume of 100 mL requires 0.5844 g, or 584.4 mg.
Solution preparation
Molarity Calculator — Solve Mass, Concentration, or Volume
Enter molecular weight and three solution variables. Auto mode solves the one missing value; explicit modes deliberately ignore stale text in the selected output field.
Calculations run locally in your browser. Values are only placed in a URL when you choose “Copy Shareable Link.”
How to use
- Choose Auto and leave exactly one solution field empty, or select the variable explicitly.
- Enter molecular weight and the remaining positive inputs.
- Choose the output unit, calculate, then copy the full audit-friendly summary.
Validation and limitations
The calculator rejects missing inputs, non-positive molecular weight, negative or zero required values, division by zero, and non-finite results. Confirm reagent identity, purity, hydrate state, and significant figures independently.
Related calculators
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Need plasmid, primer, sequence, or protein workflows? Continue in RayCrest MDS for Mac.