Molarity & Solution Calculator
Solve common chemistry-solution calculations: molarity M = n/V, dilution M₁V₁ = M₂V₂, pH/pOH from hydrogen-ion concentration, and mass↔moles via molar mass. Each mode lets you fill in the known quantities (with their own units) and leave the one you want blank — the calculator solves it and shows the result in equivalent units. Everything runs locally in your browser.
Molarity M = n/V is moles of solute per liter of solution. Dilution M₁V₁ = M₂V₂ keeps the amount of solute constant when you add solvent. pH = −log₁₀[H⁺] measures acidity on a 0–14 scale (25 °C, where pKw = 14 and pOH = 14 − pH). Moles n = mass / molar mass convert between a weighed mass and the chemical amount. Pairs with the Ideal Gas Law calculator for chemistry work. Everything runs locally — nothing leaves your browser.