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Use our free Caffeine Intake Calculator to calculate daily caffeine intake, check safe limits, track caffeine per kg, and estimate caffeine remaining.
| Beverage | Serving Size | Caffeine (mg) |
|---|---|---|
| Coffee (drip) | 8 oz / 240 ml | ~95 |
| Espresso | 1 oz / 30 ml | ~63 |
| Cold Brew | 8 oz / 240 ml | ~155 |
| Latte / Cappuccino | 8 oz / 240 ml | ~63 |
| Black Tea | 8 oz / 240 ml | ~47 |
| Green Tea | 8 oz / 240 ml | ~28 |
| Red Bull | 8.4 oz / 250 ml | ~80 |
| Monster Energy | 16 oz / 473 ml | ~160 |
| 5-Hour Energy | 2 oz / 60 ml | ~200 |
| Celsius | 12 oz / 355 ml | ~200 |
| Cola Soda | 12 oz / 355 ml | ~35 |
| Pre-Workout (1 scoop) | varies | ~150–200 |
A cup of coffee can wake you up. A cup of tea can help you relax. An energy drink may give you a quick boost. Still, every drink adds caffeine to your daily total.
That is why our Caffeine Intake Calculator is helpful. It lets you calculate your total caffeine intake in seconds, similar to a BMI Calculator which calculates body mass index. You can also compare your intake with the recommended daily limit. If you enter your weight, the calculator gives you a more personal result.
The calculator works with coffee, tea, espresso, energy drinks, soda, chocolate, and other caffeine sources, which may also be tracked using a Carbohydrate Calculator. It also estimates how much caffeine may still remain in your body after several hours.
The tool is fast, simple, and free. You only need a few numbers to get clear results.
A Caffeine Intake Calculator is an online tool that estimates how much caffeine you consume in one day.
It adds the caffeine from every drink or food you enter. Then it compares your total with a safe daily limit.
Our calculator also shows:
Your total daily caffeine intake.
Your recommended daily limit.
Your remaining safe intake.
Your caffeine intake per kilogram.
The percentage of your daily limit.
The estimated caffeine left in your body after a chosen number of hours.
This gives you a better picture of your daily caffeine habits.
Many people drink caffeine without thinking about it.
One cup may not seem like much. Yet several drinks can quickly add up.
For example, imagine filling a small bucket with water. One cup looks tiny. Keep pouring, and the bucket fills before you notice. Caffeine works in a similar way.
Tracking your intake helps you:
Stay within safe daily limits.
Avoid drinking too much caffeine.
Plan your coffee breaks.
Reduce sleep problems.
Understand your daily caffeine habits.
Our calculator uses simple math to produce accurate results.
Total Caffeine = Sum of (Caffeine per Serving × Number of Servings)
Example:
Coffee = 95 mg × 2 servings = 190 mg
Tea = 47 mg × 1 serving = 47 mg
Energy Drink = 80 mg × 1 serving = 80 mg
Total Daily Caffeine = 190 + 47 + 80 = 317 mg
Recommended Limit = Body Weight (kg) × 5
If the result is greater than 400 mg, the calculator uses 400 mg as the maximum daily limit for most healthy adults.
Example:
Weight = 70 kg
70 × 5 = 350 mg
Recommended Daily Limit = 350 mg
Remaining Intake = Daily Limit − Total Intake
Example:
350 − 317 = 33 mg
You can still consume about 33 mg before reaching your limit.
Percentage Used = (Total Intake ÷ Daily Limit) × 100
Example:
317 ÷ 350 × 100 = 90.57%
Caffeine per kg = Total Intake ÷ Body Weight
Example:
317 ÷ 70 = 4.53 mg/kg
Remaining Caffeine = Initial Caffeine × (0.5)^(Hours ÷ Half-Life)
Example:
Initial Intake = 200 mg
Hours = 10
Half-Life = 5 hours
200 × (0.5)^(10 ÷ 5)
200 × 0.25
Remaining Caffeine = 50 mg
Using the calculator takes less than a minute.
The calculator instantly shows your total caffeine intake, daily limit, remaining allowance, intake per kilogram, percentage used, and caffeine remaining.
Suppose you drank:
Two cups of drip coffee
One cup of black tea
One can of Red Bull
Your body weight is 70 kg.
Coffee:
95 × 2 = 190 mg
Tea:
47 × 1 = 47 mg
Red Bull:
80 × 1 = 80 mg
Total Intake:
190 + 47 + 80 = 317 mg
Daily Limit:
70 × 5 = 350 mg
Remaining Intake:
350 − 317 = 33 mg
Percentage Used:
317 ÷ 350 × 100 = 90.57%
Caffeine per kg:
317 ÷ 70 = 4.53 mg/kg
The calculator shows that you are close to your daily limit.
A Caffeine Intake Calculator makes it easy to understand how much caffeine you consume each day. It does the math for you and gives clear results in seconds.
Whether you drink coffee, tea, soda, energy drinks, or pre-workout supplements, this tool helps you stay informed. It also helps you compare your intake with common daily recommendations.
If you want a quick way to monitor your caffeine habits, this calculator is a smart choice. It is simple, fast, and easy for anyone to use.
A Caffeine Intake Calculator estimates the total amount of caffeine you consume in one day. It also compares your intake with a recommended daily limit.
Most healthy adults can safely consume up to 400 mg of caffeine per day. Individual needs may differ.
Yes. You can enter several drinks or foods. The calculator adds them together automatically.
Your weight allows the calculator to estimate a more personal caffeine limit using 5 mg per kilogram of body weight.
Yes. Enter the hours since your last caffeine intake and the calculator estimates how much caffeine may still remain based on the selected half-life.
Yes. It works for coffee, espresso, tea, soda, chocolate, energy drinks, pre-workout supplements, and custom caffeine values.
Yes. You can use the Caffeine Intake Calculator online for free without creating an account.