Tea
Caffeine in Green tea
Analyzing the caffeine content, clearance timeline, and sleep impact of Green tea.
Caffeine Quick Facts
Caffeine Amount 28 mg
Serving Size 8 oz cup
Category Tea
Comparison & Strength
A serving of Green tea has 28 mg of caffeine.
0.4x Espresso Shots (63mg)
0.3x Drip Coffee Cups (95mg)
Estimated Clearance Timeline
Assuming an average adult half-life of ~5 hours:
5 Hours Later → ~14 mg left
10 Hours Later → ~7 mg left
15 Hours Later → ~4 mg left
Interactive Timeline Calculator
Track how drinking Green tea fits into your day and affects your bedtime. Adjust your bedtime or add other drinks below.
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Calculations assume an average adult caffeine half-life of approximately 5 hours and an estimated absorption period of around 45 minutes. Individual responses to caffeine may vary.