Free Online Partial Pressure Calculator

Partial Pressure Calculator

Calculate partial pressures using Dalton’s Law, Ideal Gas Law, and Henry’s Law with detailed explanations.

Dalton’s Law of Partial Pressures

The total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of individual gases.

Total Pressure (P_total)

Mole Fraction (χ)

Calculation Result

Enter values and click calculate to see results

Formula:

P_gas = χ × P_total

Where:
P_gas = Partial pressure of the gas
χ = Mole fraction of the gas
P_total = Total pressure of the gas mixture

Ideal Gas Law

The pressure of an ideal gas is related to its amount, volume, and temperature.

Moles of Gas (n)

Volume (V)

Temperature (T)

Calculation Result

Enter values and click calculate to see results

Formula:

P = nRT / V

Where:
P = Pressure
n = Number of moles
R = Ideal gas constant (0.0821 L·atm/mol·K)
T = Temperature in Kelvin
V = Volume

Henry’s Law

The amount of gas that dissolves in a liquid is proportional to its partial pressure above the liquid.

Henry’s Constant (k_H)

Concentration (C)

Calculation Result

Enter values and click calculate to see results

Formula:

P = C / k_H

Where:
P = Partial pressure of the gas
C = Concentration of the gas in the liquid
k_H = Henry’s law constant

Dalton’s Law

Dalton’s Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.

Ideal Gas Law

The Ideal Gas Law describes the relationship between pressure, volume, temperature, and the number of moles of an ideal gas.

Henry’s Law

Henry’s Law states that at a constant temperature, the amount of gas that dissolves in a liquid is directly proportional to its partial pressure.