Chemistry calculations become much easier when you know which formula to use, what each symbol means, and which unit conversions to watch out for. This page brings together Reviewston’s chemistry tools and calculators for O-Level, IGCSE, A-Level and Singapore H2 Chemistry students.
Each tool is designed to help you check your answer and understand the method behind the calculation. Where possible, the individual calculator pages include the formula used, worked examples, common exam traps and related chemistry notes.
Most Useful Chemistry Tools
Start with the tools students use most often for mole calculations, concentration, gases, equilibrium and electrochemistry.
Convert between mass, moles, particles and atom count using Avogadro’s constant.
Find molar mass, formula mass or molecular weight from a chemical formula.
Calculate concentration using amount of substance and solution volume.
Use mole ratio and titre values to solve volumetric analysis questions.
Convert between pH, pOH, hydrogen ion concentration and hydroxide ion concentration.
Use pV = nRT to solve gas law, molar gas volume and gas molar mass questions.
Calculate Kc from equilibrium concentrations and compare Qc with Kc.
Calculate Kp from partial pressures or convert between Kc and Kp.
Calculate Ecell, standard EMF, ΔG and non-standard cell potential.
Browse Chemistry Tools by Topic
Use the sections below to jump to the calculator group that matches the topic you are revising. Some links open a specific section inside a larger calculator page when the tools are closely related.
Core Mole and Formula Tools
These tools support the mole concept, chemical formula calculations, compound naming, balanced equations and yield calculations. They are especially useful for stoichiometry questions.
- Mole Calculator
- Mass to Moles Calculator
- Moles to Mass Calculator
- Moles to Particles Calculator
- Particles to Moles Calculator
- Atom Count Calculator
- Molar Mass Calculator
- Chemical Name and Formula Calculator
- Empirical Formula Calculator
- Molecular Formula Calculator
- Percent Composition Calculator
- Chemical Equation Balancer
- Limiting Reagent Calculator
- Percentage Yield Calculator
- Atom Economy Calculator
Solutions, Concentration and Titration Tools
These tools help with concentration, dilution, titration, pH, buffer calculations and acid-base chemistry.
Gas Law and Physical Chemistry Tools
These calculators are useful for ideal gases, molar gas volume, molar mass of gases, partial pressure and gas mixture calculations.
Equilibrium and Kinetics Tools
These tools are especially useful for A-Level and Singapore H2 Chemistry students studying equilibrium constants, reaction quotients, rate equations and reaction kinetics.
Energetics and Thermodynamics Tools
These tools help students organise energy changes, bond energy calculations, Hess’ Law cycles, Born-Haber cycles and thermodynamic relationships.
Electrochemistry Tools
These tools support calculations involving electrochemical cells, standard cell potential, the Nernst equation, electrolysis and Faraday’s law.
Atomic Structure and Periodicity Tools
These tools support atomic structure, isotopes, electron configuration, electronegativity, bond polarity and periodic trends.
Organic Chemistry and Spectroscopy Tools
These tools help students connect molecular formula, combustion data, functional groups and spectroscopy evidence when solving organic chemistry questions.
- Degree of Unsaturation Calculator
- Combustion Analysis Calculator
- Organic Combustion Equation Balancer
- Combustion Stoichiometry Calculator
- Proton NMR Solver
- 1H NMR Spectrum Helper
- Proton NMR Integration Calculator
- Proton NMR Splitting Predictor
- Proton NMR Chemical Shift Table
- Structure Elucidation Helper
- IR Absorption Identifier
- Functional Group Identifier
Proton NMR spectrum helper, integration, splitting, chemical shift and structure elucidation are grouped inside the Proton NMR Solver. IR absorption and functional group identification are grouped together because students use IR peaks and chemical test clues to infer possible functional groups.
Frequently Asked Questions
Are these chemistry tools meant to replace exam working?
No. These tools are meant to help you check your method and understand the calculation. In an exam, marks are usually awarded for correct formula use, substitution, units, significant figures and chemical reasoning.
Why is Functional Group Identifier inside IR Absorption Identifier?
IR peaks are often used to identify functional groups. Keeping IR absorption and functional group identification together makes the page stronger and avoids a thin separate page.
Why is the 1H NMR Spectrum Helper inside Proton NMR Solver?
Proton NMR questions are normally solved by combining chemical shift, integration, splitting and molecular formula clues. Keeping these tools together makes the NMR page more useful for students.
Why are some tools combined into one Reviewston page?
Some chemistry tools overlap heavily. Grouping closely related tools into one stronger page makes the site easier to use and avoids many thin pages.
Will more chemistry tools be added?
Yes. Reviewston will continue to add and improve tools based on the calculations students use most often. Closely related tools may be grouped on one stronger page instead of split into many thin pages.