Chemistry Calculators
Professional tools for Chemistry Calculators
Our Chemistry Calculators collection covers every chemistry topic from molarity and pH to stoichiometry, gas laws, and thermochemistry. Whether you are preparing solutions in a lab, solving AP Chemistry problems, or studying for a college exam, our 95 free chemistry calculators provide instant answers with complete step-by-step solutions!
Reaction Rate Calculator — Rate Law, Integrated Rate Laws & Reaction Order
Free reaction rate calculator — compute rate=k[A]^m[B]^n, determine reaction order and rate constant by method of initial rates, solve integrated rate laws for zero/first/second order, and identify reaction order from concentration-time graphs. Full step-by-step working
Use Calculator →Osmotic Pressure Calculator — π=iMRT, Van’t Hoff Equation & Colligative Properties
Free osmotic pressure calculator — compute π=iMRT for any solution, find molar mass of proteins by osmometry, determine van't Hoff factor, and compare all four colligative properties. Includes tonicity predictor and reverse osmosis pressure tool
Use Calculator →Boiling Point Elevation Calculator — ΔTb=Kbmi & Freezing Point Depression
Free boiling point elevation calculator — compute ΔTb=Kb×m×i and ΔTf=Kf×m×i for any solvent, find molar mass by cryoscopy, calculate van't Hoff factor. Includes Kb/Kf tables for 10 solvents and van't Hoff factor presets for common solutes
Use Calculator →Activation Energy Calculator — Arrhenius Equation, Ea & Rate Constant
Free activation energy calculator — solve k=Ae^(−Ea/RT) for any variable, find Ea using the two-point Arrhenius method, perform linear regression on Arrhenius plot (ln k vs 1/T), and visualize the potential energy diagram. Full step-by-step working
Use Calculator →Half Life Calculator — Radioactive Decay, Carbon Dating & Decay Constant
Free half life calculator — solve N=N₀(½)^(t/t½) for any variable, calculate carbon-14 dating age, find decay constant λ, and reference half-lives for 25+ isotopes. Includes types of radioactive decay with nuclear equations. Full step-by-step working
Use Calculator →Equilibrium Constant Calculator — Kc, Kp, ICE Tables & Q vs K
Free equilibrium constant calculator — write Kc/Kp expressions, solve ICE table problems, convert Kp to Kc using Kp=Kc(RT)^Δn, and compare Q to K to predict reaction direction. Full step-by-step solutions with color-coded ICE tables.
Use Calculator →Gibbs Free Energy Calculator — ΔG=ΔH−TΔS, Spontaneity & Equilibrium
Free Gibbs free energy calculator — compute ΔG=ΔH−TΔS, find spontaneity, convert ΔG° to equilibrium constant K (ΔG°=−RT×lnK), calculate ΔG from cell voltage (ΔG=−nFE), and use standard Gibbs free energy of formation tables. Full step-by-step working.
Use Calculator →Enthalpy Calculator — ΔH Reaction, Hess’s Law, Calorimetry & Clausius-Clapeyron
Free enthalpy calculator — compute ΔH of reaction using Hess's law, solve calorimetry problems (q=mcΔT), find enthalpy of fusion and vaporization, and use Clausius-Clapeyron to relate vapor pressure to temperature. Full step-by-step working with energy diagrams
Use Calculator →Stoichiometry Calculator — Mole Ratios, Limiting Reagent & Yields
Free stoichiometry calculator with steps. Solve mole ratio, limiting reagent, theoretical yield, percent yield, and gram-to-gram word problems for any balanced chemical equation
Use Calculator →Atomic Number Calculator — Protons, Neutrons & Electrons from Any Element
Free atomic number calculator. Find protons, neutrons, and electrons for any element or isotope. Includes electron configuration, ion calculator, isotope tool, and mini periodic table with step-by-step working
Use Calculator →Exact Mass Calculator — Monoisotopic Mass & Isotope Abundance
Free exact mass calculator. Calculate monoisotopic mass from chemical formula, generate MS adduct m/z values [M+H]+, [M+Na]+, view isotope patterns, and compute isotope abundance and average atomic mass with step-by-step working.
Use Calculator →Buffer pH Calculator — Henderson-Hasselbalch Equation Calculator
Free buffer pH calculator using the Henderson-Hasselbalch equation. Solve for pH, pKa, or concentration ratio, generate buffer preparation protocols for phosphate, Tris, acetate, citrate & HEPES buffers, and calculate buffer capacity — with step-by-step working
Use Calculator →Michaelis-Menten Calculator — Km, Vmax, Kcat & Lineweaver-Burk Plot
Free Michaelis-Menten calculator — solve for Km, Vmax, velocity, and substrate concentration, generate Lineweaver-Burk plots from data, calculate kcat and catalytic efficiency, and model enzyme inhibition. Full step-by-step working
Use Calculator →Dilution Factor Calculator – C1V1=C2V2, Dilution Ratio & Serial Dilution Solve
Free dilution factor calculator. Solve C1V1=C2V2 equations, calculate dilution ratios (1:10, 1:50), serial dilutions, and cell dilutions. Instant recipe box showing exactly how to prepare your solution
Use Calculator →Reaction Order Calculator – Zero First & Second Order Kinetics, Half Life & Rate Constant
reaction order calculator solve zero order, first order, and second order integrated rate laws, calculate half-life, find rate constant k, and determine reaction order from experimental data with step-by-step working
Use Calculator →Reaction Order Calculator – Zero, First & Second Order Kinetics, Half Life & Rate Constant
Free reaction order calculator solve zero order and first order kinetics equations, calculate half-life, determine reaction order from data. Includes integrated rate law solver and graphs.
Use Calculator →Partial Pressure Calculator – Dalton’s Law, Mole Fraction & Gas Mixtures
partial pressure calculator use Dalton's Law and mole fraction to find partial pressure of any gas. Includes ideal gas law method, gas mixture analyzer, and pressure unit converter.
Use Calculator →Percent Composition Calculator | Find Composition by Mass of Any Compound
find the percent composition by mass of any compound from its chemical formula or mass data. Step-by-step working with examples and practice problems.
Use Calculator →Empirical Formula Calculator – Find Empirical & Molecular Formula from Percent Composition
Free empirical formula calculator - find the empirical and molecular formula from percent composition or element masses. Step-by-step working with examples for every calculation.
Use Calculator →Limiting Reactant Calculator – Find Limiting & Excess Reagent Step by Step
Free limiting reactant calculator - identify the limiting reagent and excess reactant from any chemical equation. Full step-by-step working, mole calculations, and practice problems included.
Use Calculator →Percent Yield Calculator | Theoretical,Actual & Experimental Yield
Free percent yield calculator — calculate theoretical yield, actual yield, and experimental yield step by step. Includes multi-step reaction yield and stoichiometry solver.
Use Calculator →Molarity Calculator & Solver Moles,Grams,mM to M Converter
Free molarity calculator solve for moles, volume, or concentration. Convert mM to M, µM to mM, and calculate molar mass by formula. Step-by-step working shown.
Use Calculator →pH Calculator – Convert Molarity to pH, pOH & Concentration
Free pH calculator – convert molarity to pH, find pOH, and calculate concentration of any solution. Step-by-step results with formula explanation.
Use Calculator →DNA Concentration Calculator
Scientific Laboratory Tool DNA Concentration Calculator Calculate nucleic acid concentration from spectrophotometry (A260) readings using the Beer-Lambert Law. Sample & […]
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