**Caffeine-Free Cokeの選択肢と比較 · CoffeeLog**

> Caffeine-Free Coca‑Colaの選択肢を比較し、通常のCokeやコーヒーとのカフェイン量の違い、体内でのカフェイン減衰の計算例、FDAや医療機関の安全上限…

Source: https://trackcaffeine.com/ja/guides/caffeine-free-coca-cola-drinks/ · language: ja · updated: 2026-08-02

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ガイド

# Caffeine-Free Coca-Cola：飲料オプション完全ガイド

著者

- [Merey Tleugazin](https://trackcaffeine.com/ja/about/) 公開日: 2026年3月11日 更新: 2026年8月2日 8分で読めます

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3. Caffeine-Free Coca-Cola：飲料オプション完全ガイド

Caffeine-free Coca-Cola products contain **0 mg** of caffeine per serving (labeled caffeine-free), while regular Coca-Cola 355 ml contains **34 mg** for comparison.

- 0 mg — labeled Caffeine‑Free Coca‑Cola contains zero caffeine per serving.
- 34 mg — a 355 ml can of Coca‑Cola in the dataset contains 34 mg of caffeine.
- 46 mg — Diet Coke (355 ml) contains 46 mg, making it the highest-caffeine Coca‑Cola family soda listed here.
- 5.7 hours — the population-average caffeine half-life; roughly 48% remains at 6 hours and ~23% at 12 hours.

*このページで扱う飲料の1回分あたりのカフェイン量を同じ尺度で示し、100 mgの睡眠閾値と400 mgの1日推奨量を表示しています。 このページへのリンクがあれば自由に再利用できます。*

このページの目次

1. Which Coca‑Cola products have no caffeine?

2. Coca‑Cola family: how much caffeine in each option

3. Practical caffeine comparisons: cola vs coffee and energy drinks

4. How caffeine-free sodas are made

5. Caffeine decay in the body — concrete math

6. Health, safety and timing

7. Choosing the right caffeine‑free Coca‑Cola product

8. Bottom line

9. How does caffeine-free Coca-Cola compare to other popular caffeine-free sodas?

10. How many caffeine-free Coca-Colas can I drink without exceeding the daily caffeine limit?

11. Will a caffeine-free Coca-Cola interfere with sleep if I drink it late in the evening?

12. How does caffeine-free Coca-Cola differ from decaf coffee in terms of caffeine content?

13. Bottom line

## Which Coca‑Cola products have no caffeine?

Coca‑Cola markets a branded "Caffeine‑Free Coca‑Cola" variant; the defining fact on the label is 0 mg of caffeine per serving. If you want a cola taste without caffeine, look for packaging explicitly labeled "Caffeine‑Free." Where a labeled product is not available, choose naturally caffeine‑free beverages (herbal tea, caffeine‑free sodas) rather than assuming a regular Cola is low‑caffeine.

## Coca‑Cola family: how much caffeine in each option

Below are caffeine numbers from our dataset for common Coca‑Cola family products and close substitutes. Use these values when comparing products or logging intake.

| Product (serving) | Caffeine (mg) | mg/100 ml |
| --- | --- | --- |
| Coca‑Cola (330 ml) | 32 mg | 9.7 mg/100 ml |
| Coca‑Cola (355 ml) | 34 mg | 9.6 mg/100 ml |
| Diet Coke (355 ml) | 46 mg | 13 mg/100 ml |
| Coke Zero (355 ml) | 34 mg | 9.6 mg/100 ml |
| Barq's Root Beer (355 ml) | 22 mg | 6.2 mg/100 ml |
| Herbal tea (240 ml) — caffeine‑free alternative | 0 mg | 0 mg/100 ml |

## Practical caffeine comparisons: cola vs coffee and energy drinks

Soda contains modest caffeine compared with coffee and many energy drinks. A 355 ml Diet Coke at 46 mg is less than a single 240 ml drip coffee (96 mg), and far less than popular energy drinks or large coffee chain servings. Below is a quick reference using dataset numbers.

| Drink | Serving | Caffeine (mg) |
| --- | --- | --- |
| Coca‑Cola | 355 ml | 34 mg |
| Diet Coke | 355 ml | 46 mg |
| Drip coffee | 240 ml | 96 mg |
| Starbucks Pike Place Brewed (Grande) | 473 ml | 310 mg |

## How caffeine-free sodas are made

Sodas are typically formulated by the manufacturer; caffeine is either included in the syrup or omitted entirely. A labeled caffeine‑free cola is produced by leaving caffeine out of the formula rather than "decaffeinating" the drink as you do coffee beans. That means the taste profile is adjusted while the beverage remains otherwise the same.

### Why it matters

Because soda caffeine is an added ingredient, a caffeine‑free version reliably has 0 mg per serving if labeled so; always read the Nutrition Facts. This differs from coffee and tea, where decaffeination reduces but rarely eliminates trace caffeine (decaf coffee in the dataset is 3 mg per 240 ml).

## Caffeine decay in the body — concrete math

The population-average half‑life of caffeine is about 5.7 hours. Practical remaining fractions: ≈69% at 3 hours, ≈48% at 6 hours, ≈33% at 9 hours, ≈23% at 12 hours. Below are worked examples using dataset doses so you can see how much caffeine remains after sleep or between drinks.

| Drink (dose) | Initial mg | After 3 h (~69%) | After 6 h (~48%) | After 9 h (~33%) | After 12 h (~23%) |
| --- | --- | --- | --- | --- | --- |
| Caffeine‑Free Coca‑Cola (labeled) | 0 mg | 0.0 mg | 0.0 mg | 0.0 mg | 0.0 mg |
| Coca‑Cola (355 ml) | 34 mg | 23.5 mg | 16.3 mg | 11.2 mg | 7.8 mg |
| Diet Coke (355 ml) | 46 mg | 31.7 mg | 22.1 mg | 15.2 mg | 10.6 mg |
| Drip coffee (240 ml) | 96 mg | 66.2 mg | 46.1 mg | 31.7 mg | 22.1 mg |

## Health, safety and timing

Guidelines: the FDA cites about **400 mg/day** as a safe upper limit for healthy adults; many groups advise lower amounts for sensitive people. For pregnancy most clinicians and some bodies recommend staying around **200 mg/day**; consult your obstetrician or the Mayo Clinic for personalized advice. The American Academy of Pediatrics discourages routine caffeine for adolescents.

Because caffeine can remain in the system for many hours (half‑life ≈5.7 h), avoid caffeinated soda and coffee within at least 6 hours of intended sleep to limit nighttime effects. If you want to eliminate sleep impact completely, choose a labeled caffeine‑free cola (0 mg) or a decaffeinated coffee (dataset: 3 mg per 240 ml).

## Choosing the right caffeine‑free Coca‑Cola product

If your goal is zero-caffeine: buy a product explicitly labeled "Caffeine‑Free Coca‑Cola" or choose herbal/decaf alternatives. If you want a lower‑caffeine cola without changing flavor much, Coke Zero (355 ml, 34 mg) and regular Coca‑Cola (355 ml, 34 mg) are similar; Diet Coke (355 ml, 46 mg) is slightly higher.

Tip: use an intake tracker (for example CoffeeLog) to log cans and cups and compare your total daily mg against guidelines. Tracking makes it simpler to stay under 200 mg when pregnant or 400 mg for general adult guidance.

## Bottom line

When labeled, Caffeine‑Free Coca‑Cola provides **0 mg** of caffeine; regular Coca‑Cola and Diet Coke contain modest caffeine (dataset: 34 mg for a 355 ml Coke, 46 mg for a 355 ml Diet Coke). Use the decay math above to estimate how long that caffeine will affect you, follow FDA/medical guidance on daily limits, and log servings to manage intake precisely.

## How does caffeine-free Coca-Cola compare to other popular caffeine-free sodas?

Caffeine-free Coca-Cola contains **0 mg** of caffeine per serving, matching the caffeine content of many other sodas labeled as caffeine-free, such as ginger ale and most root beers. However, not every non-cola soda is caffeine-free; the dataset shows that Sunkist Orange delivers **41 mg** per 355 ml, and even Barq’s Root Beer has **22 mg**. A consumer who needs to avoid caffeine entirely must read labels rather than assume a clear or fruit-flavored soda is safe. The table below places caffeine-free Coca-Cola beside common caffeinated sodas to make the contrast clear.

| Drink | Caffeine (mg) per 355 ml |
| --- | --- |
| Caffeine-Free Coca-Cola | 0 mg |
| Coca-Cola (regular) | 34 mg |
| Diet Coke | 46 mg |
| Pepsi | 38 mg |
| Dr Pepper | 42 mg |
| Mountain Dew | 54 mg |
| Barq’s Root Beer | 22 mg |
| Herbal tea (240 ml) | 0 mg |

Because caffeine-free cola is a formulated product, manufacturers simply leave caffeine out of the syrup, as explained earlier. This guarantees the 0 mg value on the label, unlike decaf coffee where trace caffeine remains (3 mg per 240 ml in the dataset). When building a daily caffeine budget, a person can treat a caffeine-free Coca-Cola as a zero-caffeine choice. The
- [best caffeine-free sodas](https://trackcaffeine.com/guides/caffeine-free-soda-options/) page lists other options, and the
- [caffeine in popular sodas](https://trackcaffeine.com/guides/soda-caffeine-content-breakdown/) guide shows exactly which brands contain caffeine. The difference between 0 mg and even 22 mg matters for someone who is pregnant, as the European Food Safety Authority’s 2015 opinion sets a **200 mg/day** limit during pregnancy, and every milligram counts toward that ceiling.

## How many caffeine-free Coca-Colas can I drink without exceeding the daily caffeine limit?

From a caffeine standpoint, you can drink as many caffeine-free Coca-Colas as you like—each one contributes **0 mg** to your daily total. The FDA cites **400 mg per day** as the safe upper limit for healthy adults, and a can of zero-caffeine cola does not move the needle at all. That means if you have already consumed a Grande Starbucks Pike Place Brewed (310 mg) and one 355 ml regular Coke (34 mg), your total stands at 344 mg. Adding any number of caffeine-free Cokes keeps you at 344 mg, well under the 400 mg boundary. For a pregnant person following the 200 mg/day guideline, the same logic applies: zero-caffeine drinks do not draw from that allowance. The safe-daily-limit tool on this site (
- [safe daily limit by body weight](https://trackcaffeine.com/tools/safe-daily-limit/)) can help you factor in your own sensitivity, but the key number is that caffeine-free sodas do not add anything. While the caffeine content is zero, consumers should still consider sugar or artificial sweeteners, which vary between regular Caffeine-Free Coca-Cola and the diet version. The
- [safe caffeine intake guide](https://trackcaffeine.com/guides/daily-caffeine-intake-guide/) lays out how to distribute calories and caffeine across the day.

## Will a caffeine-free Coca-Cola interfere with sleep if I drink it late in the evening?

No, a caffeine-free Coca-Cola will not disrupt sleep through caffeine because it contains **0 mg**. The population-average caffeine half-life of 5.7 hours that applies to regular cola becomes irrelevant when there is no caffeine to metabolize. In contrast, a 355 ml regular Coca-Cola (34 mg) consumed at 8 pm leaves roughly **7.8 mg** still circulating at 8 am the next morning, which is enough to affect some people. A study by Drake et al. in the Journal of Clinical Sleep Medicine (2013) demonstrated that 400 mg of caffeine taken six hours before bed still shortened objective sleep time by more than an hour. While a single can of cola contains far less, the cumulative effect of multiple caffeinated beverages across an evening can build a sleep-disrupting dose. Replacing an evening cola with a caffeine-free version removes that variable entirely. The
- [latest cup you can have before bedtime](https://trackcaffeine.com/tools/last-cup-before-bed/) calculator shows exactly when to stop regular caffeine to protect sleep, but with a 0 mg product the answer is any time.

## How does caffeine-free Coca-Cola differ from decaf coffee in terms of caffeine content?

Caffeine-free Coca-Cola contains **0 mg** of caffeine, whereas decaf coffee in the dataset holds **3 mg** per 240 ml. That small difference matters for people who must keep caffeine intake at absolute zero—for example, those with severe caffeine sensitivity or a clinician's instruction to avoid all sources. Because decaffeination processes remove most but not all caffeine from coffee beans, a chain of decaf coffees across a day could contribute significant milligrams. The USDA FoodData Central database confirms that typical decaf coffee runs from 2–5 mg per cup. By contrast, a labeled caffeine-free cola is manufactured without caffeine from the start, so the 0 mg value is reliable. For a person who wants a warm alternative that also hits zero,
- [caffeine-free herbal teas](https://trackcaffeine.com/guides/caffeine-free-herbal-tea-guide/) such as chamomile or rooibos are another 0 mg option in the dataset. When comparing a caffeine-free soda to a decaf latte, the difference is one of certainty: 0 mg versus a few milligrams that can accumulate. The
- [decaf coffee caffeine levels](https://trackcaffeine.com/guides/decaf-coffee-caffeine-levels/) guide on this site explores how even small amounts can become relevant for daily totals.

## Bottom line

When you see caffeine-free Coca-Cola on a label, the drink delivers **0 mg** of caffeine. That single number separates it from a regular 355 ml Coca-Cola (34 mg), a Diet Coke (46 mg), and all other caffeinated sodas in the dataset. Because it contributes nothing to your daily caffeine total, it fits cleanly inside the FDA’s **400 mg/day** ceiling for healthy adults and the **200 mg/day** guideline for pregnancy that the EFSA and the NHS recommend. Even if you are tracking every milligram with a tool like the
- [caffeine half-life calculator](https://trackcaffeine.com/tools/caffeine-calculator/), a caffeine-free cola does not alter the decay curve—there is nothing to decay.

Choosing a caffeine-free option at night means zero risk of caffeine-related sleep disruption, unlike a regular cola where 34 mg at 8 pm still leaves about 7.8 mg at 8 am (half-life 5.7 hours). Compared with decaf coffee, which holds 3 mg per 240 ml, the cola’s 0 mg is more absolute. The final takeaway: if you want the cola taste with no caffeine, reach for the bottle that says “Caffeine-Free,” and you can safely stop counting milligrams for that serving.

## よくある質問

### Diet Cokeはカフェインフリー？

No. Per the dataset, a 355 ml can of Diet Coke contains 46 mg of caffeine.

### Coke Zeroにカフェインは入ってる？

Yes. The dataset lists Coke Zero at 34 mg per 355 ml can.

### Coca‑Colaの355 ml缶のカフェイン量は何mg？

A 355 ml can of Coca‑Cola contains 34 mg of caffeine (the dataset also lists a 330 ml version at 32 mg).

### 午後8時に355 mlのCokeを飲んだら睡眠に影響しますか？

Caffeine half‑life averages 5.7 hours; from 34 mg about 16.3 mg remains after 6 hours. To reduce sleep effects, avoid caffeinated drinks at least 6 hours before bedtime or choose a labeled caffeine‑free option (0 mg).

### カフェインフリーのコーラは子どもに安全ですか？

Caffeine‑free cola contains 0 mg caffeine but still has sugar and calories. The American Academy of Pediatrics discourages routine caffeine for adolescents; consult pediatric guidance about sugary beverages for children.

### コーラとコーヒーでカフェインの抜き方はどう違う？

Sodas are formulated without added caffeine for a caffeine‑free variant (result: 0 mg). Coffee is decaffeinated using chemical or water processes and can retain a small trace (dataset decaf coffee: 3 mg per 240 ml).

### カフェインフリーのCoca‑Colaにガラナやタウリンなどの成分は入ってますか？

No. Caffeine-free Coca-Cola is formulated with no caffeine and no added stimulants. It provides 0 mg of caffeine per serving, and the ingredient list does not include guarana, taurine, or other compounds that mimic caffeine's effect.

CoffeeLog · iOS

## これをCoffeeLogで自動的に記録する

このサイトはその疑問に一度答えます。CoffeeLogは毎日答えます — 飲んだものを記録し、カフェインの減衰をリアルタイムで表示し、睡眠に影響が出る前の最後に飲める一杯を教えてくれます。

- [App Storeでダウンロード](https://apps.apple.com/us/app/caffeine-tracker-coffeelog/id6774424227)
- [計算機を開く](https://trackcaffeine.com/ja/tools/caffeine-calculator/)

## 関連記事

1. [チョコレートとカフェイン：包括的ガイド guide](https://trackcaffeine.com/ja/guides/caffeine-in-chocolate/)
2. [おすすめの無カフェイン炭酸飲料とソフトドリンク listicle](https://trackcaffeine.com/ja/guides/caffeine-free-soda-options/)
3. [Bang Energy Drink：正確なカフェイン量はどれくらい？ guide](https://trackcaffeine.com/ja/guides/bang-energy-drink-caffeine-content/)
4. [Starbucksドリンクのカフェイン：キャラメルマキアートとその他 guide](https://trackcaffeine.com/ja/guides/starbucks-drink-caffeine-guide/)
5. [Dunkin Cold Brew：サイズ別の正確なカフェイン量 faq](https://trackcaffeine.com/ja/guides/dunkin-cold-brew-caffeine-levels/)
6. [カフェインフリーのおすすめコーヒー listicle](https://trackcaffeine.com/ja/guides/caffeine-free-coffee-alternatives/)
7. [Coca-Cola (330 ml) — 32 mg Drink](https://trackcaffeine.com/ja/caffeine-in/coca-cola-330-ml/)
8. [Caffeine half-life calculator Calculator](https://trackcaffeine.com/ja/tools/caffeine-calculator/)
9. [Last cup before bed Calculator](https://trackcaffeine.com/ja/tools/last-cup-before-bed/)

TrackCaffeine はカフェインに関する一般的な参考情報を提供します。医療アドバイスではありません。カフェインの数値は公開情報に基づく推定値であり、正確な測定値ではありません。

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