Chemistry Calculators
Stoichiometry, solutions, and gas laws.
Boyle's Law Calculator (P₁ V₁ = P₂ V₂)
Calculate inverse relationship between pressure ($P$) and volume ($V$) of a gas at constant temperature ($P_1 \cdot V_1 = P_2 \cdot V_2$).
Buffer Solution Calculator (Henderson-Hasselbalch)
Calculate resulting pH of a buffer solution using the Henderson-Hasselbalch equation ($pH = pKa + \log_{10}\frac{[A^-]}{[HA]}$).
Charles's Law Calculator (V₁ / T₁ = V₂ / T₂)
Calculate gas volumetric expansion or contraction ($V_1 / T_1 = V_2 / T_2$) with varying absolute temperature at constant pressure.
Hydrocarbon Complete Combustion & CO₂ Emission Calculator
Calculate oxygen demand ($O_2$) and carbon dioxide emissions ($CO_2$) produced by hydrocarbon combustion ($C_n H_m$).
Half-Life & Radioactive Decay Calculator
Calculate remaining substance ($N(t) = N_0 \cdot (1/2)^{t / t_{1/2}}$) after exponential decay over time.
Ideal Gas Law Calculator (P V = n R T)
Calculate pressure ($P$), volume ($V$), moles ($n$), or temperature ($T$) using the Ideal Gas Equation of State ($P \cdot V = n \cdot R \cdot T$).
Mass Percent Concentration Calculator (% w/w)
Calculate mass percentage concentration ($\frac{m}{m} \% = \frac{\text{Solute Mass}}{\text{Total Solution Mass}} \times 100$) of mixtures and solutions.
Molarity & Solution Concentration Calculator
Calculate Molar concentration ($M = \text{moles}/L$) of an aqueous solution from solute mass, molar mass, and volume.
Molecular Weight & Percent Composition Calculator
Calculate molecular weight / molar mass in $g/mol$ of selected chemical compounds and elemental percent composition.
Chemical Reaction Percent Yield Calculator
Calculate reaction stoichiometric efficiency percentage ($\text{Percent Yield} = \frac{\text{Actual}}{\text{Theoretical}} \times 100$).
pH, pOH & Hydronium Ion Concentration [H⁺] Calculator
Calculate pH ($pH = -\log_{10}[H^+]$), pOH, and hydroxide $[OH^-]$ from molar hydronium ion concentration.
Solution Dilution Calculator (C₁ V₁ = C₂ V₂)
Calculate stock solution volume ($V_1$) or target concentration ($C_2$) using the dilution equation ($C_1 \cdot V_1 = C_2 \cdot V_2$).