Chemistry

Use our Ideal Gas Law Calculator to solve pressure, volume, moles, or temperature with PV = nRT. Supports SI and L·atm gas constants with unit conversion.

Use our Atom Calculator to find protons, neutrons, electrons, atomic number, mass number, and ionic charge quickly from standard atomic relationships.

Theoretical Yield Calculator to find the maximum product yield from stoichiometry, limiting reagent, and molar relationships.

PPM to Molarity Calculator to convert parts per million into molarity using molar mass and solution assumptions.

Free pH calculator that syncs [H+], [OH−], pOH, concentration, and mass/volume. Supports strong/weak acids and bases, unit options, steps, and PDF.

Use our Molarity Calculator to find moles, mass concentration, and molarity from solute mass, molar mass, and solution volume.

Calculate remaining quantity, elapsed time, half-life, decay constant, or mean lifetime with formulas, steps, units, and a worked example.

Convert between moles and representative particles using the exact Avogadro constant, with examples for atoms, molecules, ions, and formula units.