1. Why does the calculator use both total mg and mg/kg?
Total milligrams show the full daily amount. Mg/kg adds body size context, which is useful when a bodyweight reference is more appropriate, especially for younger users or custom review.
Estimate intake across coffee, tea, soda, and tablets. See per serving, per day, and mg/kg. Use practical limits, warnings, exports, visuals, and comparisons instantly.
Enter body weight, choose the reference type, and add up to eight caffeine sources. Results appear above this form after submission.
| Source | Preset mg per Serving | Servings | Total mg |
|---|---|---|---|
| Filter Coffee (200 ml) | 90 | 2.00 | 180 |
| Black Tea (220 ml) | 50 | 1.00 | 50 |
| Cola (355 ml can) | 40 | 1.00 | 40 |
| Plain Chocolate (50 g) | 25 | 1.00 | 25 |
| Daily Total | 295 mg | ||
Example interpretation: a 70 kg adult at 295 mg is about 4.21 mg/kg and 73.75% of a 400 mg reference.
Total milligrams show the full daily amount. Mg/kg adds body size context, which is useful when a bodyweight reference is more appropriate, especially for younger users or custom review.
Yes. Presets are only starting points. Packaged products, café drinks, and supplements often vary, so entering the label value makes the estimate more accurate.
Energy drinks can deliver caffeine quickly and may also include other stimulants or large serving sizes. The calculator highlights extra caution when younger users include them.
No. This version totals daily intake. It does not model absorption timing, bedtime effects, or how long caffeine stays in your body.
Yes. Choose a custom source and enter the caffeine amount listed on the product label per serving, then add the number of servings taken.
Caffeine can change with bean type, brew method, roast, cup size, and brand. That is why editable fields are better than fixed estimates alone.
A negative value means the total has gone above the selected target. The magnitude of the negative number shows how many milligrams the target was exceeded by.
No. It is an educational estimator. People with health conditions, medication interactions, high sensitivity, or special dietary needs should seek individualized professional guidance.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.