Category · 6 tools
Free chemistry calculators for formulas and solutions
Chemistry calculations repeat the same handful of relationships: formula mass to moles, moles to concentration, and concentration to dilution. Getting one step right but the next wrong is normal when units are mixed or a formula is misread. These tools calculate each step separately and print the formula, so a mistake is visible before it reaches a lab report.
The molar mass calculator parses common chemical formulas, including groups in brackets, and reports each element's contribution. The solution tools cover molarity, dilution and mole conversion with explicit litre and mole units. These are teaching and quick-check calculators for idealised textbook problems; real solutions, non-ideal mixtures and hazardous preparations need qualified supervision and your course or lab protocols.
In this category
- Chemical Equation Balancer
- Dilution Calculator
- Half-Life Calculator
- Molar Mass Calculator
- Molarity Calculator
- Mole Calculator
Formulas, solutions and moles
Formulas, moles and solutions in the right order
Chemistry calculations are a chain: a formula gives molar mass, molar mass turns a weighed amount into moles, and moles combined with volume give concentration. Each page here handles one link in that chain and shows the formula, so you can stop at the right place instead of carrying a rounding error through three steps. The molar mass parser accepts brackets and nested groups, which covers most textbook formulas.
Solution problems are idealised arithmetic. The dilution calculator assumes C1V1 = C2V2 and no reaction; molarity assumes the solute is fully dissolved and the volume is the final solution volume. Real lab work adds purity, temperature, non-ideal behaviour and safety procedures that no calculator models, so use these results for study and quick checks rather than as a preparation protocol.
- Finding the molar mass of a hydrate
- Enter the full formula including the water of crystallisation as written in your course; the parser reports each element's contribution.
- Preparing a diluted standard
- Use the dilution calculator to find the stock volume, then follow your lab's volumetric procedure rather than measuring with a beaker.
- Cross-checking a titration result
- Convert mass to moles, then moles and volume to molarity, and compare with the concentration written on the bottle.
Guides for Chemistry Tools
All guidesThe format background, trade-offs and failure modes behind these tools — written for people who want to know why a conversion works the way it does.