A GAS Calculator works by applying scientific gas laws to user-provided data. The user enters known values such as pressure, temperature, volume, or number of moles. The calculator then uses mathematical formulas to determine the unknown value. Most GAS Calculator tools include input fields where users enter values. These values may be measured in different units such as liters, cubic meters, atmospheres, Pascals, Kelvin, or Celsius. Advanced calculators automatically convert units when necessary.