Mole Calculator
LiveCalculate moles from mass, particles, molarity and volume with formula-assisted molar mass lookup.
Calculator category
Chemistry Calculators
Calculate foundational chemistry relationships for amount of substance, molar mass, molecular weight, molarity, molality, normality, dilution, pH, pOH, buffers, titration and stoichiometry using deterministic formulas and local reference data.
Last reviewed: July 22, 202612 live tools18 planned tools30 total tools
Search chemistry calculators
Find mole, molar mass, molecular weight, molarity, molality, normality, dilution, pH, pOH, buffer, titration and stoichiometry calculators.
30 calculators
Calculate molar mass from a chemical formula with element counts and atomic-weight contributions.
Calculate molecular weight or relative formula mass from a chemical formula.
Calculate molarity, moles or solution volume from moles and litres of solution.
Calculate molality or moles from solute amount and kilograms of solvent.
Calculate normality from equivalents, volume, molarity and equivalent factor.
Calculate final concentration or stock volume with the C1V1 = C2V2 dilution equation.
pH Calculator
LiveCalculate pH from hydrogen ion concentration or hydrogen ion concentration from pH.
pOH Calculator
LiveCalculate pOH from hydroxide ion concentration and estimate related pH at 25 C.
Estimate buffer pH from pKa, conjugate base concentration and weak acid concentration.
Calculate analyte concentration from titrant concentration, volumes and mole ratio.
Calculate target moles from known moles using balanced chemical equation coefficients.
Limiting Reactant Calculator
PlannedFind the limiting reagent and excess reagent from balanced reaction amounts.
Percent Yield Calculator
PlannedCompare actual yield with theoretical yield.
Empirical Formula Calculator
PlannedFind simplest whole-number formula ratios from composition data.
Molecular Formula Calculator
PlannedFind molecular formula from empirical formula and molar mass.
Chemical Equation Balancer
PlannedBalance chemical equations with integer coefficients.
Ideal Gas Law Calculator
PlannedSolve PV = nRT gas-law relationships.
Gas Density Calculator
PlannedEstimate gas density from molar mass, pressure and temperature.
Partial Pressure Calculator
PlannedCalculate gas mixture partial pressures.
Henry's Law Calculator
PlannedEstimate dissolved gas concentration from Henry's Law.
Raoult's Law Calculator
PlannedEstimate vapor pressure lowering from mole fraction.
Boiling Point Elevation Calculator
PlannedEstimate boiling point elevation from molality.
Freezing Point Depression Calculator
PlannedEstimate freezing point depression from molality.
Reaction Rate Calculator
PlannedCalculate reaction rate from concentration change over time.
Half-Life Calculator
PlannedCalculate chemistry half-life relationships for reaction kinetics.
Equilibrium Constant Calculator
PlannedCalculate equilibrium constant expressions from concentrations.
Solubility Product Calculator
PlannedCalculate Ksp and ion concentrations.
Nernst Equation Calculator
PlannedEstimate cell potential with the Nernst equation.
Redox Calculator
PlannedSupport oxidation-reduction calculation workflows.
Moles and Formula Mass
Convert between moles, mass, particles, molar mass, molecular weight and formula composition.
Mole Calculator
LiveCalculate moles from mass, particles, molarity and volume with formula-assisted molar mass lookup.
Calculate molar mass from a chemical formula with element counts and atomic-weight contributions.
Calculate molecular weight or relative formula mass from a chemical formula.
Solution Concentration
Calculate molarity, molality, normality and dilution relationships with clear unit handling.
Calculate molarity, moles or solution volume from moles and litres of solution.
Calculate molality or moles from solute amount and kilograms of solvent.
Calculate normality from equivalents, volume, molarity and equivalent factor.
Calculate final concentration or stock volume with the C1V1 = C2V2 dilution equation.
Acid-Base Calculations
Estimate pH, pOH and buffer pH for simplified educational acid-base calculations.
pH Calculator
LiveCalculate pH from hydrogen ion concentration or hydrogen ion concentration from pH.
pOH Calculator
LiveCalculate pOH from hydroxide ion concentration and estimate related pH at 25 C.
Estimate buffer pH from pKa, conjugate base concentration and weak acid concentration.
Titration and Stoichiometry
Use balanced mole ratios for titration concentration and reaction stoichiometry questions.
Calculate analyte concentration from titrant concentration, volumes and mole ratio.
Calculate target moles from known moles using balanced chemical equation coefficients.
What Chemistry calculators cover
This Chemistry hub focuses on formula-based tools that calculate locally without external chemistry APIs. Phase 1 covers the core calculations most often needed before more advanced equilibrium, gas-law and redox tools are introduced.
The live tools handle mole conversions, formula mass, concentration, acid-base estimates, titration relationships and balanced-equation mole ratios. Planned cards reserve the remaining Chemistry inventory without creating duplicate routes.
How to choose the right Chemistry tool
Use Mole, Molar Mass and Molecular Weight calculators when a problem starts with a formula, mass, particle count or amount of substance. Use Molarity, Molality, Normality and Dilution calculators when the problem is about solution concentration.
Use pH, pOH and Buffer calculators for simplified acid-base relationships. Use Titration and Stoichiometry calculators when balanced reaction coefficients control the mole ratio.
FAQs
What can I calculate with NexaCalc Chemistry Calculators?
You can calculate mole conversions, molar mass, molecular weight, molarity, molality, normality, dilution, pH, pOH, buffer pH, titration concentration and balanced-reaction stoichiometry.
Which Chemistry calculators are available now?
There are 12 live Chemistry calculators in Phase 1: Mole, Molar Mass, Molecular Weight, Molarity, Molality, Normality, Dilution, pH, pOH, Buffer, Titration and Stoichiometry.
How are mole, molar mass and molecular weight related?
Moles connect mass to amount of substance through molar mass. Molecular weight has the same numeric formula-mass basis but is usually reported as a relative number, while molar mass is reported in g/mol.
How are molarity, molality and normality different?
Molarity uses moles per litre of solution, molality uses moles per kilogram of solvent, and normality uses equivalents per litre for a specific reaction context.
How does the Dilution Calculator use C1V1 = C2V2?
The Dilution Calculator keeps solute amount constant, so stock concentration times stock volume equals final concentration times final volume after unit conversion.
How do pH and pOH calculators relate to hydrogen and hydroxide ion concentration?
The pH calculator uses pH = -log10[H+], while the pOH calculator uses pOH = -log10[OH-]. At 25 C in the simplified model, pH plus pOH is estimated as 14.
What does the Buffer Calculator estimate?
The Buffer Calculator estimates pH with the Henderson-Hasselbalch equation from pKa, conjugate base concentration and weak acid concentration.
How does the Titration Calculator use acid-base stoichiometry?
It uses titrant concentration, titrant volume, analyte volume and balanced reaction coefficients to calculate the unknown analyte concentration at equivalence.
What does the Stoichiometry Calculator calculate?
It converts known moles of one substance into target moles of another substance using coefficients from a balanced chemical equation.
Which Chemistry tools are planned next?
Planned tools include limiting reactant, percent yield, empirical formula, molecular formula, equation balancing, gas-law, colligative-property, kinetics, equilibrium, solubility, Nernst and redox calculators.
Are Chemistry results suitable for lab work?
These calculators are useful for education and planning, but lab work requires verified formulas, purity, glassware, safety data, instructor guidance and measurement procedures.
Do Chemistry calculators replace lab measurement or safety guidance?
No. NexaCalc Chemistry calculators do not replace laboratory measurement, safety procedures, chemical compatibility checks or professional analysis.
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