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Caffeine Half-Life Body Clearance Calculator

Caffeine[t] = dose × e^(−0.693t/5.7) — clearance over time.

Calculates remaining caffeine in the body over time using a 5.7-hour average half-life (first-order elimination kinetics).

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

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

C(t) = C0 × e^(−0.693 × t / t½); default t½ ≈ 5.7 h

In depth

Calculates remaining caffeine in the body over time using a 5.7-hour average half-life (first-order elimination kinetics).