Langmuir Isotherm Calculator

Find surface coverage from the Langmuir isotherm.

Surface coverage (θ) 0.5

Coverage (%) 50

Formula: θ = K·P ÷ (1 + K·P)

Step-by-step with your numbers:

1. Values used:

2. Langmuir constant (K) = 2 1/atm

3. Pressure = 0.5 atm

5. Surface coverage (θ) = 0.5

6. Coverage = 50%

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The Langmuir isotherm models fractional adsorption coverage on a surface.

The math behind it

θ = K·P ÷ (1 + K·P), where θ ranges 0 (empty) to 1 (full monolayer).

K 2, P 0.5 atm → θ = 0.5 (50%).

High pressure?

θ approaches 1 — the surface saturates.