Chemical calculators
Free chemistry tools that work in your browser — no signup, no login. Balance any chemical equation automatically, or explore the periodic table with full element details.
Fe + O2 = Fe2O3) and get the smallest-integer balanced form instantly. Handles parentheses, polyatomic ions, and arbitrary numbers of reactants and products.About these tools
Both calculators run entirely in your browser — nothing you type is sent to a server, logged, or saved. The equation balancer uses Gaussian elimination on the element-count matrix to find the smallest positive integer coefficients, the same method taught in introductory chemistry. The periodic table uses standardised IUPAC data for all 118 confirmed elements.
For complementary tools, see the math calculators (linear systems, matrix determinant) and the unit conversions.
Common questions
Is the equation balancer accurate for complex equations?
Yes for any chemically balanceable equation, including ones with polyatomic ions, multiple reactants and products, and nested parentheses. It uses linear algebra to solve the system, not heuristics. For redox / ionic equations involving charge balance, the tool handles atom balance only — manual charge balancing may still be needed.
How current is the periodic table data?
All 118 elements as confirmed by IUPAC, including the 2016-named oganesson (Z = 118). Atomic masses use the most recent IUPAC abridged values; for synthetic super-heavy elements (Z > 110) where the most stable isotope determines the listed mass, the value reflects the longest-lived known isotope.
Does the periodic table work offline?
Yes — the entire dataset is loaded with the page. Once the page is open, search and detail lookups work without a network connection.