免费 · 健康与健身
咖啡因计算器.
累计咖啡、茶、能量饮料和可乐中的咖啡因，与每日建议上限比较，并查看睡前体内还剩多少。
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使用方法: 咖啡因计算器
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英语技术说明
Caffeine content varies by brand and brewing; general information, not medical advice. Everything is calculated in your browser; nothing you type is uploaded.
Each dose decays exponentially with a half-life of about 5 hours (adjustable). Limits follow EFSA and FDA guidance: 400 mg a day for adults, 200 mg when pregnant, 3 mg per kg for teenagers.
A coffee at 7:30, a double espresso at 13:00 and a cola at 16:00 add up to 255 mg; about 55 mg is still in your body at 23:00.