Calculate molar mass, pH, and molarity for chemistry problems
Compute the core quantities of general chemistry from one tool. Pick a mode - molar mass & composition, pH, molarity, solution dilution, stoichiometry, or the ideal gas law - enter your values, and get the answer instantly. Formulas are typed in standard notation and the parser handles subscripts and parentheses automatically.
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A lab procedure needs the molar mass of water to weigh out a solution accurately.
Formula
H2O
Molar mass
2 × 1.008 (H) + 16.00 (O) = 18.015 g/mol
The tool parses the formula, multiplies each element by its standard atomic weight, and sums, so multi-element and parenthesised formulas (like Ca(OH)₂) are handled without arithmetic slips. It also balances equations and does stoichiometry conversions.
Compute the core quantities of general chemistry from one tool. Pick a mode - molar mass & composition, pH, molarity, solution dilution, stoichiometry, or the ideal gas law - enter your values, and get the answer instantly. Formulas are typed in standard notation and the parser handles subscripts and parentheses automatically.
Molar mass parses a molecular formula (including nested parentheses like Ca(OH)2), sums atomic masses from a built-in dataset of common elements, and breaks down the percent composition by element. The pH mode converts a known acid or base concentration to pH, pOH, and the hydrogen/hydroxide ion concentrations. Molarity divides moles by volume; the dilution mode solves C1V1 = C2V2 for whichever of the four quantities you leave blank. The stoichiometry mode multiplies a reactant amount by a molar ratio you supply. The ideal gas law solver rearranges PV = nRT to find P, V, n, or T, choosing the gas constant to match your chosen pressure unit (atm, kPa, or bar).
Compute molar masses, pH, and stoichiometric quantities for homework and lab reports.
Calculate dilution volumes and molar concentrations before preparing solutions.
Look up molar masses and percent composition without flipping through a textbook.
Practice pH, dilution, and gas law problems with instant feedback.
Type it in standard notation, for example H2O or Ca(OH)2. The parser normalizes capitalization and expands parentheses with subscripts.
Yes. Formulas like Ca(NO3)2 are parsed correctly, including parentheses with subscripts.
The ideal gas law solver picks R to match your pressure unit: 0.08206 L·atm/(mol·K) for atm, 8.314 for kPa, and 0.08314 for bar. Temperature is in Kelvin.
No. This tool does not balance equations; it covers molar mass, pH, molarity, dilution, stoichiometry by molar ratio, and the ideal gas law.
Every calculation runs locally in your browser. Your numbers and expressions are not transmitted or stored.