ChemistryAll chemistry tools
Reactions & stoichiometry
5- Chemical Equation Balancer & CalculatorBalance chemical equations or practice inspection balancing—a chemical equation calculator with smallest coefficients, steps, and a live atom-check table.
- Stoichiometry CalculatorCalculate molar mass and convert between moles, grams, and particles for chemical formulas.
- Limiting Reagent CalculatorFind the limiting reagent, theoretical yield, and percent yield from a balanced equation and starting amounts.
- Composition & Empirical Formula CalculatorGet mass percent composition from a formula, or find empirical and molecular formulas from percent data.
- Redox Equation BalancerBalance redox equations in acidic or basic medium with atom and charge conservation (H₂O / H⁺ / OH⁻).
Solutions & concentration
2- Dilution Calculator (C₁V₁ = C₂V₂)Solve C₁V₁ = C₂V₂ for stock or diluted concentration and volume, or plan a serial dilution (HCl, H₂SO₄, 1:20, 10×, alcohol, bleach).
- Molarity & Concentration ConverterConvert concentration to molarity (M, mM, μM, nM), mg/mL, ng/mL, g/L, mass percent, % w/v, ppm, and molality using molar mass and density.
Equilibrium & acids
4- Chemical Equilibrium CalculatorChemical equilibrium calculator for Kc/Kp, reaction quotient Q, ICE tables, and equilibrium concentrations.
- pH CalculatorpH calculator from concentration and Ka/Kb—strong/weak acids and bases (including ammonia, Kb = 1.8×10⁻⁵), simple buffers via Henderson–Hasselbalch, and strong acid–base neutralization.
- Phosphate Buffer CalculatorPhosphate buffer calculator and citrate–phosphate (McIlvaine) mixer, plus HEPES, MES, acetate, Tris, and more—grams from target pH, concentration, and volume.
- Ksp CalculatorCalculate Ksp from molar solubility (BaCrO₄, A₃B₂, AgI…), find solubility from Ksp, and compare Q with Ksp to predict precipitation.
Energy, rates & electrochemistry
3- Thermochemistry CalculatorCompute ΔH° from formation enthalpies, apply Hess’s law, run calorimetry q = mcΔT, and scale heat with moles.
- Kinetics CalculatorKinetics and rate constant calculator for half-life and integrated rate laws—solve for concentration, time, or k in zero-, first-, and second-order reactions.
- Nernst Equation CalculatorCalculate non-standard cell potential E from E°, n, and Q, plus ΔG = −nFE.
MathematicsAll mathematics tools
Graphing & dynamics
3- Phase Portrait GeneratorPhase portrait calculator, generator, and plotter for 2D autonomous systems—vector field, trajectories, and equilibria (center, spiral, saddle).
- 2D Graphing CalculatorPlot y = f(x) with adjustable windows and local extrema markers.
- Time Graphing ToolAnimate functions of time and parametric trajectories with a playable t parameter.
ComputingAll computing tools
Web & numbers
3- Binary Calculator & ConverterConvert and compute across binary, octal, decimal, and hexadecimal number systems.
- Hex Color Picker & ConverterPick colors and convert between HEX, RGB, and HSL for web workflows.
- HTML ExecutorRun HTML, CSS, and JavaScript in the browser. Open an .html file or type code — live sandboxed preview, no install.
Guides
3- Physics GREPhysics GRE equation sheet and formula sheet—mechanics, E&M, quantum, thermo, optics, relativity, high-yield constants, topic weights, and a two-week study plan.
- Electric FieldLearn electric field concepts, key formulas, and point-charge visualizations for introductory and GRE-level physics.
- Chem FormulasGeneral chemistry formula sheet and equation sheet—moles, dilution, equilibrium, Ksp, pH, gas laws, kinetics, and thermochemistry, with links to free calculators.
