Chemistry Calculators

Acid-Base Titration Calculator

Calculate the concentration, volume, or moles of acid or base in a titration. Solve for unknown concentration using the titration equation and equivalence point data.

Arrhenius Reaction Rate Calculator

Calculate chemical reaction rate constants using the Arrhenius equation. Find how temperature affects reaction speed and determine activation energy from two rate measurements.

Buffer Solution pH Calculator (Henderson-Hasselbalch)

Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation. Enter the acid pKa and concentrations of the conjugate base and weak acid.

Limiting Reagent Calculator

Find the limiting reagent in a chemical reaction. Calculate theoretical yield, percent yield, and the amount of excess reagent remaining after the reaction.

Moles to Grams Converter (Chemistry)

Convert between moles, grams, and number of particles for any element or compound. Enter the molar mass to perform stoichiometry conversions instantly.

Osmotic Pressure Calculator

Calculate osmotic pressure using the van't Hoff equation. Enter molar concentration, van't Hoff factor, and temperature to get osmotic pressure in atm, kPa, mmHg, or bar.

Molar Concentration Calculator

Calculate molarity (mol/L), moles, mass of solute, or volume of solution — solve for any variable in the molarity formula.

Stoichiometry Calculator

Calculate moles and mass of reactants and products from a balanced chemical equation using mole ratios.

Boiling Point Elevation Calculator

Calculate how much the boiling point of a liquid increases when a solute is dissolved. Uses the colligative property formula ΔTb = Kb × m.

Charles's Law Gas Temperature and Volume Calculator

Calculate gas volume or temperature changes using Charles's Law. Find the new volume or temperature of a gas at constant pressure.

Chemical Molar Mass Calculator

Calculate the molar mass of common chemical compounds. Enter element symbols and counts to get the molecular weight in g/mol.

Combined Gas Law Calculator

Solve for pressure, volume, or temperature using the combined gas law (P₁V₁/T₁ = P₂V₂/T₂). Supports metric and imperial units.

Ideal Gas Law Calculator (PV=nRT)

Solve the ideal gas law equation PV=nRT for any unknown variable. Calculate pressure, volume, moles, or temperature of an ideal gas.

pH Mixing Calculator

Calculate the resulting pH when mixing two solutions of different pH and volume. Covers acid-acid, base-base, and acid-base mixing.

Chemical Solution Mixer

Calculate dilution ratios for mixing chemical solutions. Use the C1V1 = C2V2 dilution equation.

pH Dilution Calculator

Calculate the new pH after diluting an acid or base solution. Enter initial pH, volume, and dilution volume.

Gas Pressure at Depth Calculator

Calculate the pressure at a given depth in water, seawater, or other fluids. Supports metric and imperial units.

Boyle's Law Calculator

Calculate pressure or volume changes using Boyle's Law (P1×V1 = P2×V2). Find any missing variable.

Dilution Calculator

Calculate dilution using C1×V1 = C2×V2. Find any missing variable for solution preparation.

Ideal Gas Law Calculator

Calculate pressure, volume, moles, or temperature using the ideal gas law PV = nRT. Supports all four solve modes.

pH Calculator

Calculate pH from hydrogen ion concentration or find H+ concentration from pH. Shows whether a solution is acidic, basic, or neutral.