Rate Constant Calculator

Find a first-order rate constant from half-life.

Rate constant (k) (1/s) 0.0116

Formula: k = 0.693 ÷ half-life (first order)

Step-by-step with your numbers:

1. Values used:

2. Half-life = 60

4. Rate constant (k) = 0.01161/s

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For a first-order reaction, the rate constant is tied directly to the half-life.

The math behind it

k = ln(2) ÷ half-life = 0.693 ÷ t½ (first-order reactions).

t½ = 60 s → k ≈ 0.01155 /s.

Other orders?

Only first-order half-life is independent of concentration like this.