#1 Free Thermochemistry Calculators 2025

Advanced pH Calculator Strong Acid Strong Base Weak Acid Weak Base Buffer Solution From [H⁺] From [OH⁻] Strong Acid pH Concentration of Strong Acid (e.g., HCl, HNO₃): MmMµM Strong Base

Stoichiometry Calculator Stoichiometry: Theory & Formulas → Stoichiometry is a section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data.

Solution Concentration Calculator Select Concentration Type: Molarity (M) Molality (m) % Mass (w/w) % Volume (v/v) Mole Fraction (X) Parts Per Million (ppm) Parts Per Billion (ppb) Show Theory &

Vapor Pressure Calculator Calculates vapor pressure at a different temperature using the Clausius-Clapeyron equation. Known Vapor Pressure (P₁): atm Pa (Pascal) kPa mmHg (torr) bar Temperature for P₁ (T₁): °C