Chemistry Tools

Free online tools for chemical calculations, analysis, and visualization.

Molar Mass Calculator

Calculate molecular weight of any compound

Predict 1H and 13C NMR spectra from structure

Convert between pressure units

Visualize molecules from SMILES notation

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

Calculate reactant and product quantities

Estimate vapor pressure using Antoine equation

Balance chemical equations automatically

Calculate pH, pOH, and concentrations

Interactive periodic table with element data

Evaluate Lipinski and drug-likeness rules

Draw and edit molecular structures in-browser

Analyze and annotate spectroscopy data