Molarity Calculator

Molarity Calculator is a clean, fast tool for solution chemistry — completely offline. Enter a molar mass and two known values, and it solves for the third: the mass to weigh out, the concentration you will get, or the volume you need. The answer updates the moment you change a value.

WHAT YOU CAN DO
• Solve for mass, molarity (concentration) or volume
• Enter molar mass in g/mol for any solute
• Switch mass units (g / mg) and volume units (mL / L) with a tap
• See the mole count and mass concentration alongside the main result
• Load ready-made presets — NaCl, glucose, NaOH, HCl and more — into the calculator

THE MATH
Molarity uses the standard relationship

M = mass ÷ (molar mass × volume)

with the mole count derived as moles = mass ÷ molar mass. Any one of mass,
molarity or volume can be found from the other two, and units are converted for
you so the concentration always comes out in mol/L (M).

LEARN AS YOU GO
A built-in Learn tab explains, in plain language, what molarity is, the mole
concept and Avogadro's number, and the dilution equation M1V1 = M2V2 for diluting
stock solutions.

ACCURACY
Results are estimates for general and educational use and are not a substitute
for laboratory measurement or professional judgement. Always follow proper safety
procedures and institutional guidance when preparing and handling solutions.

PRIVACY
The app collects no personal data and works fully offline — your inputs never
leave your device. Ads are served by Google AdMob, which may use an advertising
identifier as described in Google's policies.

Light and dark themes, a tiny download, and no clutter. Download Molarity
Calculator and prepare solutions with confidence.

Recent changes:
improve app performance and stability