basic

Second-Order Integrated Rate Law Calculator

1/[A]t = 1/[A]₀ + kt — second-order kinetics.

Solves the integrated second-order rate law: 1/[A]_t = 1/[A]₀ + k·t. Given any three of the four variables ([A]₀, [A]_t, k, t), computes the fourth. Also calculates t½ = 1/(k·[A]₀).

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

Inputs

mol/L
L/(mol·s)
s

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

1/[A]t = 1/[A]₀ + k·t

In depth

Solves the integrated second-order rate law: 1/[A]_t = 1/[A]₀ + k·t. Given any three of the four variables ([A]₀, [A]_t, k, t), computes the fourth. Also calculates t½ = 1/(k·[A]₀).