Unlabeled

Caffeine left after a cup of coffee, hour by hour for a day, in a simple model

With a typical adult half-life of 5 hours, 50% of a cup's caffeine is left after 5 hours, 25% after 10 and 4% a day later. The half-life differs a lot from person to person.

What does this axis measure?
What does this axis measure?
Caffeine left after a cup of coffee, hour by hour for a day, in a simple model: 25 points, a line chart.
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Caffeine still in the body (%)
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Hours since the last cup (hours)
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The data: 25 points
Hours since the last cup (hours)Caffeine still in the body (%)
0100
187.1
275.8
366
457.4
550
643.5
737.9
833
928.7
1025
1121.8
1218.9
1316.5
1414.4
1512.5
1610.9
179.5
188.2
197.2
206.2
215.4
224.7
234.1
243.6
Source
Computed: 100 × 0.5^(hours ÷ half-life), with the half-life of caffeine in adults from the FDA-approved prescribing information for caffeine citrate (Hikma), via DailyMed (National Library of Medicine)
Licence
Original computation by Unlabeled; nothing copied from the source but the half-life
Read
2026-10-26
Drawn
25 points as the puzzle showed them · line
  • Ran in puzzle #31 on October 27, 2026. Play it