All calculatorsGOB Chemistry Calculators & Converters
Connect chemistry to life—fast answers, solid understanding.
Activation Energy Calculator
Compute Eₐ or k₂ using the Arrhenius equation with steps
Actual Yield Calculator
Find actual, percent, or theoretical yield with unit conversion
Arrhenius Equation Calculator
Calculate k, activation energy, or k₂—clear steps and plot included
Bohr Model Energy Level Calculator
Compute Bohr energy levels and photon transitions with clear steps
Boiling Point at Altitude Calculator
Compute boiling temperature vs. altitude using Antoine or Clausius–Clapeyron
Cube Volume Calculator
Instant cube volume from edge or diagonal, with unit conversion.
Entropy Calculator
Calculate entropy changes for gases, heating, and phase changes
Enzyme Activity Calculator
Compute enzyme units, rate, and specific activity from lab assays
Factoring Calculator
Quickly factor ax² + bx + c and get the roots
Gibbs’ Phase Rule Calculator
Calculate system degrees of freedom from components, phases, and reactions
Half-Life Calculator
Compute N, k, t, or t₁/₂—enter three, get the rest
Lean Body Mass Calculator
Estimate your fat-free body weight in seconds — simple & clear
Mixing Ratio Converter
Convert ratio ↔ percent and compute amounts for w/w, w/v, v/v
Molar Ratio Calculator
Compute mole or mass relationships from balanced chemical equations
Neutralization Calculator
Solve acid–base equivalence fast — clear steps, visuals, and conversions
Percent Solution Converter
Convert w/w, w/v, and v/v percent solutions — with clear steps
Percent Yield Calculator
Find percent yield, actual yield, or theoretical yield instantly
Percentage Concentration to Molarity Calculator
Convert any % solution to molarity — fast, clear, and accurate
Rate Constant Calculator
Compute k from rate or integrated laws with steps, visuals
Rate of Effusion Calculator
Calculate any missing rate or molar mass using Graham’s Law