Tag: How long will 4 cups of coffee keep you awake

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How long will 4 cups of coffee keep you awake? A Deep Dive into Caffeine's Effects

Jan 1, 2026 •

4 min read

While the average caffeine half-life is 4-6 hours, the answer to how long will 4 cups of coffee keep you awake depends on multiple personal factors. The stimulating effects can persist far longer, disrupting sleep even hours after consumption.