Tool 507 · Concentration & solution prep
Molarity Calculator
Prepare a molar solution, calculate concentration from what you actually weighed, or convert a concentrated w/w reagent into molarity. Formula parsing, purity correction, unit normalization and lab-ready directions are built in.
Solid → solutionMass needed from target M and final volume.
Reverse calculationFind M from mass or moles and final volume.
Concentrated reagentw/w% + density → stock molarity and molality.
Formula-awareNested formulas, hydrates, names and manual lot MW.
How much solid should I weigh?
Target concentration + final solution volume + molar mass → required reagent mass.
Compound / molar mass
Formula-derived molecular weight. You can overwrite it with a lot/batch-specific value.
Target solution
Lab-ready preparation
What went into the final solution?
Concentrated reagent data
Use lot-specific density, assay and molar mass when available. This mode calculates the reagent's own concentration; dilution planning belongs in Tool #508.