Chemistry tools

Molar Mass Calculator

Calculate molecular weight of any compound

Stoichiometry Calculator

Calculate reactant and product quantities

Reaction Scale Calculator

Scale a stored reaction recipe from one anchor reagent's amount

pH Calculator

Calculate pH, pOH, and concentrations

Vapor Pressure Calculator

Estimate vapor pressure using Antoine equation

Fractional Distillation Predictor

Predict cuts and azeotrope warnings for a multi-component mixture

Pressure–Temperature Nomograph

Compound-specific bp at any pressure (replaces Sigma-Aldrich's nomograph)

Equation Balancer

Balance chemical equations automatically

NMR Spectrum Predictor

Predict 1H and 13C NMR spectra from structure

Drug-Likeness

Evaluate Lipinski and drug-likeness rules

SMILES To Structure Converter

Visualize molecules from SMILES notation

Spectroscopy File Converter

Convert SPC, JCAMP-DX, NMR files to CSV/Excel

Pressure Unit Converter

Convert between pressure units

Periodic Table

Interactive periodic table with element data

Reactions Browser

Curated + imported synthesis reactions; calculator-ready set with yield + duration

SDS Products Browser

Vendor SDS catalog with structured component lookup

Covalent

Draw and edit molecular structures in-browser

Signum

Analyze and annotate spectroscopy data