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Free calculators and molecular structure tools with explicit inputs, visible methods, and stated limitations.
No registration required. Search by task, formula, format, or chemical term.
Essential Chemistry Calculators
Reactions, Kinetics & Thermodynamics
Chemical Equation Balancer
Balance formula-based chemical equations with exact integer coefficients and automatic atom-conservation validation.
Reaction Kinetics Calculator
Calculate Arrhenius rate constants and integrated rate-law half-lives from user-supplied kinetic parameters.
Thermodynamics Calculator
Calculate Gibbs energy from user-supplied enthalpy, entropy, temperature, and optional constant heat capacity.
Phase Diagram Calculator
Explore phase states for supported pure substances using sourced critical points, triple points, and vapor-pressure correlations.
Molecular Structure Tools
Solutions, Properties & Analysis
용액 준비 계산기
특정 농도의 용액을 준비하기 위해 필요한 용질과 용매의 양을 계산. 몰농도, 몰랄농도, 질량 백분율 및 PPM을 지원합니다.
Chemical Safety Information Lookup
Look up reference chemical properties and hazard information by name or CAS number. This summary is not a substitute for a supplier-issued SDS.