All Chemistry Tools and Calculators
Search, filter, and sort 22 free chemistry calculators, reference pages, and study guides.
Interactive Periodic Table
Explore all 118 elements with atomic masses and categories.
Reference guide
Open Periodic Table →Chemical Equation Balancer
Balance chemical equations and verify atom counts on both sides.
reactant atoms = product atoms
Open Equation Balancer →pH Calculator
Calculate pH, pOH, [H+], and [OH-] for acid-base problems.
pH = -log[H+]
Open pH Calculator →Molarity Calculator
Solve concentration, moles, and volume with M = n/V.
M = n / V
Open Molarity →Molecular Weight Calculator
Calculate molar mass from formulas with parentheses and bracket groups.
M = Σ(atomic mass × count)
Open Molecular Weight →Lewis Structure Drawer
Draw dot structures, count valence electrons, and check formal charge.
Organic guide
Open Lewis Structures →Limiting Reagent Calculator
Find the limiting reactant from equation stoichiometry and amounts.
moles ÷ coefficient
Open Limiting Reagent →Ideal Gas Law Calculator
Solve PV = nRT with pressure, volume, mole, and temperature units.
PV = nRT
Open Ideal Gas Law →Percent Yield Calculator
Calculate actual, theoretical, or percent yield.
% yield = actual / theoretical × 100
Open Percent Yield →IUPAC Name Generator
Generate systematic organic names from structure rules.
Organic guide
Open IUPAC Names →Half Life Calculator
Calculate remaining amount, elapsed time, or half-life.
N = N0(1/2)^(t/t½)
Open Half Life →Dilution Calculator
Use C1V1 = C2V2 to prepare lab dilutions.
C1V1 = C2V2
Open Dilution →Boiling Point Reference
Search boiling points and run elevation calculations.
ΔTb = Kbmi
Open Boiling Point →Empirical Formula Calculator
Convert percent composition or masses to simplest formula ratios.
moles = mass / atomic mass
Open Empirical Formula →Named Reactions Database
Search named reactions, reagents, products, and conditions.
Organic guide
Open Named Reactions →Buffer pH Calculator
Use Henderson-Hasselbalch for buffer systems.
Solutions guide
Open Buffer pH →Gibbs Free Energy Calculator
Calculate ΔG and interpret spontaneity.
ΔG = ΔH - TΔS
Open Gibbs Energy →Functional Group Identifier
Identify alcohols, carbonyls, amines, esters, and more.
Organic guide
Open Functional Groups →Reaction Mechanism Visualizer
Visualize curved-arrow reaction mechanisms step by step.
Organic guide
Open Mechanisms →Electronegativity Chart
Compare Pauling values and classify bond polarity.
Reference guide
Open Electronegativity →Proton NMR Prediction Tool
Predict 1H NMR chemical shifts, splitting patterns, integrations, and proton environments from structure input.
Organic guide
Open Proton NMR →Carbon NMR Prediction Tool
Predict 13C NMR chemical shifts and carbon environments for organic structure analysis.
Organic guide
Open Carbon NMR →