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