basic

Dalton's Law of Partial Pressures Calculator

P_total = P₁ + P₂ + P₃ — sum of partial pressures.

Calculates the partial pressure of each gas in a mixture: P_i = x_i · P_total, and the total pressure as the sum of up to four partial pressures.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kPa
kPa
kPa
kPa

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

P_total = P₁ + P₂ + P₃; P_i = x_i · P_total

In depth

Calculates the partial pressure of each gas in a mixture: P_i = x_i · P_total, and the total pressure as the sum of up to four partial pressures.