Chemical Equation Balancer
Balance chemical equations and see balanced coefficients, atom counts, and step-by-step results.
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Free Chemistry Calculators
Our free chemistry calculators help you solve common chemistry calculations including chemical equations, stoichiometry, Lewis structures, molar mass, limiting reactants, and net ionic equations. Each tool gives you accurate, step-by-step results.
Popular: Stoichiometry · Limiting Reactant · Molar Mass · Net Ionic Equation
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Balanced equation
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Popular Chemistry Calculators
Start with the tools students use most. Open a calculator, enter the problem, and read the step-by-step working.
Lewis Structure Generator
Generate Lewis structures with valence electrons, bonds, lone pairs, and formal charges.
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Stoichiometry Calculator
Calculate mole ratios, reactant and product amounts, mass, and stoichiometric conversions.
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Limiting Reactant Calculator
Find the limiting reagent, excess reactant, and maximum product yield.
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Theoretical Yield Calculator
Calculate maximum product yield from a balanced equation, reactant amount, mole ratio, and molar mass.
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Grams to Moles Calculator
Convert grams to moles (and moles to grams) from a chemical formula or molar mass, with step-by-step results.
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Chemical Equation Calculators
Solve, balance, and analyze chemical equations using calculators built for common general chemistry problems.
Chemical Equation Balancer
Balance chemical equations and see balanced coefficients, atom counts, and step-by-step results.
Example
Net Ionic Equation Calculator
Write complete ionic and net ionic equations, including spectator ions, for aqueous reactions.
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Empirical Formula Calculator
Convert percent composition or mass data into an empirical formula and a molecular formula.
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Stoichiometry, Moles & Formula Calculators
Work from moles to mass and from empirical formula to molecular formula. These calculators cover the conversions that show up in almost every stoichiometry problem: molar mass, reactant and product amounts, and limiting reagents.
Stoichiometry Calculator
Calculate mole ratios, reactant and product amounts, mass, and stoichiometric conversions.
Example
Limiting Reactant Calculator
Find the limiting reagent, excess reactant, and maximum product yield.
Example
Theoretical Yield Calculator
Calculate maximum product yield from a balanced equation, reactant amount, mole ratio, and molar mass.
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Molar Mass Calculator
Calculate molar mass from any chemical formula with atomic weights, mass percentages, and step-by-step results.
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Grams to Moles Calculator
Convert grams to moles (and moles to grams) from a chemical formula or molar mass, with step-by-step results.
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Empirical Formula Calculator
Convert percent composition or mass data into an empirical formula and a molecular formula.
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Popular Chemical Equations
Explore balanced equations, atom counts, reaction ratios, and step-by-step solutions for common chemistry reactions.
How to Use Our Chemistry Calculators
Three steps, the same on every tool: choose the calculator, enter the problem, then read the working.
1
Choose a chemistry calculator
Pick the tool that matches the problem, such as the Chemical Equation Balancer, Stoichiometry Calculator, or Lewis Structure Generator.
2
Enter your chemistry problem
Type the chemical equation, formula, mass, or moles you need to work with. Use ordinary notation such as H2SO4 or H2 + O2 -> H2O.
3
Get step-by-step results
Read the answer together with coefficients, atom counts, mole ratios, and conversion steps so you can check the chemistry, not only the final line.
Why Use Our Chemistry Calculators?
Use these calculators when you need an accurate answer you can check, with the working shown next to it.
Accurate calculations
Coefficients and conversions are calculated from the chemistry, not guessed.
Step-by-step results
Every calculator shows the working: balanced coefficients, atom counts, and the conversions behind the answer.
Free to use
No account is required. Open a calculator, enter the problem, and read the result.
Multiple chemistry tools
Solve the chemistry calculations that come up most often, from equations to moles and formulas.
Frequently Asked Questions
What is a chemistry calculator?
A chemistry calculator is an online tool that solves common chemistry calculations such as chemical equations, stoichiometry, molar mass, and limiting reactants. You enter the problem you are working on and get a result you can check, instead of only a final number.
What chemistry problems can I solve?
You can balance chemical equations, generate Lewis structures, run stoichiometry calculations, find limiting reactants, compute molar mass, determine empirical formulas, and write net ionic equations. Each calculator handles one kind of general chemistry problem.
Are the chemistry calculators free?
Yes. These chemistry calculators are free to use. You do not need an account to enter a problem or read the step-by-step results.
Do the calculators show steps?
Yes. Step-by-step results are part of every tool. Alongside the final answer you will see coefficients, atom counts, mole ratios, and conversion steps so you can follow the chemistry, not only copy an answer.
Can I use these calculators for homework?
Yes. Use them for checking work, understanding calculations, and learning chemistry concepts. Read the steps, compare them with your own reasoning, and treat the result as a worked example rather than a substitute for the assignment.