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カフェむン蚈算機

1日のカフェむン摂取量を蚈算し掚奚量ず比范したす。半枛期に基づく䜓内残留量もリアルタむムで確認できたす。

☕
Espresso
63mg
0
☕
Americano
150mg
0
☕
Drip Coffee
95mg
0
🧊
Cold Brew
200mg
0
🍵
Green Tea
30mg
0
🫖
Black Tea
50mg
0
⚡
Energy Drink
80mg
0
🥀
Cola
35mg
0

ℹ What is Caffeine?

Caffeine is a natural stimulant found in coffee, tea, and energy drinks. In moderate amounts, it enhances alertness and concentration. However, excessive intake may cause anxiety, insomnia, and headaches.

📖 䜿い方

  1. Select the drinks you've consumed today and their quantities
  2. Enable time tracking if you want to calculate remaining caffeine
  3. Click Calculate
  4. Check your total caffeine intake and percentage of daily limit

✹ 䞻な機胜

  • ✓8 drink presets (coffee, tea, energy drinks, etc.)
  • ✓Percentage of recommended daily intake display
  • ✓Half-life based remaining caffeine calculation
  • ✓Sleep-safe time estimation

📐 蚈算匏

Remaining = Intake × 0.5^(elapsed time ÷ half-life)

💡 蚈算原理

  • •Caffeine has an average half-life of 5-6 hours. If you consume 100mg, about 50mg remains after 5.5 hours.
  • •The recommended daily caffeine intake for adults is 400mg, equivalent to about 2-3 cups of americano.
  • •Caffeine reaches peak blood concentration 30-60 minutes after consumption and takes about 10 hours to be fully eliminated.
  • •When caffeine drops below 100mg in your body, it typically doesn't significantly affect sleep.

❓ よくある質問

Q. How much caffeine is in one cup of americano?

A. A typical americano (12oz/355ml) contains about 150mg of caffeine. This can vary based on the number of espresso shots.

Q. How many cups of coffee can I drink per day?

A. For healthy adults, up to 400mg per day is recommended. That's about 2-3 americanos or 6 espresso shots.

Q. What is caffeine half-life?

A. Half-life is the time it takes for half of a substance to be eliminated from your body. For caffeine, it's about 5-6 hours on average, though it varies by individual.

Q. When should I stop drinking coffee to not affect sleep?

A. Generally, avoid caffeine after 2 PM (8 hours before bedtime). If you're sensitive to caffeine, stop even earlier.

Q. Which has more caffeine - green tea or coffee?

A. Coffee has much more caffeine. One cup of green tea (30mg) has about 5 times less caffeine than one americano (150mg).

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カフェむン蚈算機 | Foxulator