Chemistry Unit Converter

Convert between temperature, pressure, mass, volume, energy, and amount of substance with step-by-step explanations.

How It Works

Most unit conversions use a simple two-step process: convert the input to a standard base unit, then convert from the base unit to the target. For example, pressure conversions go through atmospheres (atm) as the base.

Temperature is the exception — Celsius, Fahrenheit, and Kelvin are related by non-linear formulas. °F = °C × 9/5 + 32, and K = °C + 273.15. These are shown in the conversion steps so you can follow the math.

This tool covers the unit categories most common in general chemistry: temperature for thermodynamics, pressure for gas laws, mass and volume for stoichiometry and solutions, energy for enthalpy and bond energies, and amount of substance for mole conversions.