General Chemistry calculators
12 calculators Average Atomic Mass Calculator Calculate average atomic mass from up to 5 isotopes. Load element presets, normalize abundances, or reverse-solve for a missing isotope abundance. Shows all work.
Open Molar Mass Calculator Enter any chemical formula to get molar mass in g/mol, percent composition, moles from mass, grams from moles, molecules, and an ideal-gas reverse-solve.
Open Percent Composition Calculator Find the percent composition by mass of every element in a compound. Enter a chemical formula or raw masses to get a full element-by-element breakdown instantly.
Open pKa Calculator Convert Ka to pKa, pKa to Ka, or find pKa from pH using the Henderson-Hasselbalch equation. Includes a functional group reference table and acid strength gauge.
Open Atom Calculator Find protons, neutrons, electrons, mass number, ionic charge and subatomic mass for any element or custom isotope. Includes electron shell config and worked steps.
Open Atomic Mass Calculator Calculate atomic mass from protons and neutrons, or find the average atomic mass from up to 5 isotopes and their abundances. Results in amu, daltons, and kg.
Open Bond Order Calculator Calculate bond order using MO theory, Lewis structure counting, or resonance averaging. Shows worked steps, a diatomic reference table, and bond type interpretation.
Open Chemical Name Calculator: IUPAC Naming for Ionic, Covalent, Acid, and Hydrate Compounds Name any ionic, covalent, acid, or hydrate compound instantly. Select ions or enter a formula and get the IUPAC name, charge balance, subscripts, and step-by-step working.
Open Effective Nuclear Charge Calculator Calculate effective nuclear charge (Z-eff) for any element using Slater's rules. Full shielding breakdown, worked steps, and periodic trends for all 118 elements.
Open Electron Configuration Calculator Find the full and noble-gas shorthand electron configuration for any element or ion. Shows valence electrons, shell breakdown, and handles all Aufbau exceptions.
Open Electronegativity Calculator Find the electronegativity difference between two elements, identify bond type (covalent, polar covalent, or ionic), and get percent ionic character on the Pauling scale.
Open Percent Ionic Character Calculator Calculate the percent ionic character of any bond using Pauling's electronegativity formula or the dipole moment method. Bond-type classification with worked steps.
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