Chemistry Tools – Small Tools. Big Help.

Welcome to SmallToolsOnline.com — your online lab assistant for solving chemistry problems quickly and accurately. Our collection of smart browser-based chemistry tools helps you calculate, balance, and convert chemical data instantly — all without installing any software or sending your data anywhere.

From simple molar mass calculators and equation balancers to advanced molecule analyzers, unit converters, and solution concentration tools, every calculator runs directly in your browser using fast JavaScript processing.

Whether you're a student learning chemistry, a teacher preparing lessons, or a researcher verifying data — Small Tools Online helps you do it faster, smarter, and safer.

All Chemistry Tools

Mm
Molar Mass Calculator
Calculate the molar mass of a compound from its formula.
EF
Empirical Formula from % Composition
Derive the simplest whole-number ratio formula from % composition data.
Mole–Gram Conversion
Convert between moles and grams using molar mass.
%
Percent Yield Calculator
Calculate percent yield from actual and theoretical yield.
LR
Limiting Reactant Calculator
Identify which reactant will be exhausted first and yield maximum product.
Dilution Calculator
Calculate new concentration or volume using C1V1 = C2V2.
ST
Stoichiometry Calculator
Compute moles or mass of reactants/products in a chemical reaction.
Reaction Balancer
Balance chemical equations by adjusting coefficients.
pH
pH Calculator from [H⁺]
Compute pH given the hydrogen ion concentration.
pOH & pH Conversion
Convert between pH and pOH values in aqueous solutions.
M→N
Molarity to Normality Converter
Convert molarity to normality based on equivalent factors.
N→M
Normality to Molarity Converter
Convert normality to molarity using equivalents.
Ideal Gas Law Calculator
Compute pressure, volume, moles or temperature from PV=nRT.
q=mcΔT
Heat Capacity / Energy Calculator
Calculate heat energy given mass, specific heat, and temperature change.
½-life
Half-Life Decay Calculator
Calculate remaining quantity after a given half-life period.
M
Concentration (Molarity) Calculator
Compute molarity from moles of solute and volume of solution.
N
Normality Calculator
Calculate solution normality based on equivalents and volume.
E°
Electrochemical Cell Potential Calculator
Determine the standard cell potential for a redox reaction.
First-Order Rate Constant Calculator
Calculate rate constant from half-life for first-order kinetics.
c
Specific Heat Capacity Calculator
Calculate specific heat needed for temperature change.
Boiling Point Elevation Calculator
Compute change in boiling point due to solute addition (ΔTb = Kb·m).
Freezing Point Depression Calculator
Calculate ΔTf = Kf·m for solutions with solutes.
π
Osmotic Pressure Calculator
Calculate osmotic pressure using π = iMRT.
pH = pKa
Henderson–Hasselbalch Calculator
Find pH of buffer solutions using pH = pKa + log(A⁻/HA).
Ksp
Solubility Product (Ksp) Calculator
Compute solubility product constant and ion concentrations.
s
Solubility from Ksp Calculator
Find molar solubility from known Ksp values.
Ka
pKa–Ka Converter
Convert between pKa and Ka values (pKa = −log Ka).
Kb
pKb–Kb Converter
Convert between pKb and Kb values.
ΔG
Gibbs Free Energy Calculator
Compute ΔG = ΔH − TΔS for reactions at constant T.
Enthalpy Change Calculator
Calculate heat change for reactions (ΔH).
ΔS
Entropy Change Calculator
Find the entropy change of a reaction or process.
Arrhenius Equation Calculator
Compute rate constant using k = Ae^(−Ea/RT).
k₂/k₁
Reaction Rate Constant Ratio
Find k₂/k₁ using Arrhenius relationship at two temperatures.
ρ
Gas Density Calculator
Calculate gas density using ρ = PM/RT.
P₁
Partial Pressure Calculator
Compute partial pressure of a gas in a mixture using mole fraction.
χ
Mole Fraction Calculator
Find mole fraction of a component in a mixture.
m
Molality Calculator
Calculate molality from moles of solute and solvent mass.
i
Van’t Hoff Factor Calculator
Compute number of particles dissociated per formula unit.
%
Atomic Mass Percent Calculator
Find percent composition of each element in a compound.
6.022×10²³
Avogadro’s Number Converter
Convert between moles and number of particles using 6.022×10²³.
MF
Molecular Formula Finder
Find the molecular formula from molar mass and empirical data.
iso
Isotope Average Mass Calculator
Compute average atomic mass based on isotopic abundances.
%
Percent Purity Calculator
Calculate the purity percentage of a given chemical sample.
%
Empirical Mass Percent Calculator
Find the percent composition for each element in a compound.
#
Atom Counter in a Compound
Count total atoms of each element in a given formula.
Redox Reaction Identifier
Identify oxidation and reduction processes in a reaction.
Ox
Oxidation Number Calculator
Determine oxidation states of elements in compounds or ions.
n
Gas Moles from Volume
Calculate number of moles using PV = nRT or molar volume.
Gas Volume from Moles
Compute the gas volume at STP or given conditions from moles.
PT
Periodic Table Explorer
View element data, atomic numbers, and periodic trends.