Calculators

Calculates the melting point of a substance based on the provided pressure. This calculator uses a simplified model and is most accurate for substances with well-defined melting points. Note: This calculator provides estimations and should not be used for critical applications.

Calculates the osmolarity of a solution based on the molar concentration of solutes.

Convert between PPM and other concentration units like percentage, ppb, ppt, mg/kg, and mg/L (for solutions with a density close to 1 g/mL).

Calculates the relative rate of effusion of two gases using Graham's Law, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

Calculates the rate constant (k), reaction rate, or substance concentration using the rate law equation.

Calculates pressure, volume, temperature, or the number of moles of an ideal gas using the Ideal Gas Law: PV = nRT. Where P = pressure, V = volume, n = number of moles, R = ideal gas constant, and T = temperature.

Calculates the relationship between pressure, volume, and temperature of a gas using the combined gas law: (P1 * V1) / T1 = (P2 * V2) / T2. This calculator allows you to solve for any one of these variables, given the others.

Calculates the vapor pressure of water at a given temperature using various empirical formulas. The calculator provides results from the Antoine equation, the August equation, the Tetens equation, the Rankine equation, and the Clausius-Clapeyron equation. Note that these formulas are approximations and may have limitations in accuracy depending on the temperature range.

Calculates the quantum yield of a photochemical process, which represents the efficiency of photon usage in initiating a specific reaction. It's the number of times a specific event occurs per photon absorbed.

This calculator helps winemakers determine the molecular SO2 content for wine stability and provides sulfite addition recommendations based on wine type and pH levels.