Chemistry Tools & Calculators
Free, practical tools for every bench and problem set — compute a molar mass, prepare a solution, dilute a stock, work out pH, apply the ideal gas law, and check your percent yield.
Molar Mass Calculator
Type any chemical formula — subscripts, nested parentheses and brackets, and hydrates like CuSO4·5H2O included — to get its molar mass in g/mol, with a per-element breakdown and mass percentages from IUPAC atomic weights
Molarity Calculator
Solve for molarity, mass, or volume of a solution using M = n/V and n = mass ÷ molar mass — enter the molar mass directly or let a chemical formula supply it, with mL and litre volumes
Dilution Calculator (C1V1=C2V2)
Solve the dilution equation for any one unknown and get the volume of solvent to add (V2 − V1) — mix molar, millimolar, and micromolar concentrations with litre, millilitre, or microlitre volumes
pH Calculator
Convert between pH, pOH, [H⁺], and [OH⁻] at 25 °C, or find the pH of a strong acid or base from its concentration — every value plus an acidic, neutral, or basic verdict
Ideal Gas Law Calculator (PV=nRT)
Solve PV = nRT for pressure, volume, amount, or temperature with full unit choice — atm/kPa/Pa, L/mL/m³, and K/°C — using R = 0.082057 L·atm·mol⁻¹·K⁻¹ (or the SI 8.314 J·mol⁻¹·K⁻¹)
Percent Yield Calculator
Percent yield = (actual ÷ theoretical) × 100 in grams or moles, or build the theoretical yield from expected moles × molar mass — with a note on what a result over 100 % really means