Caffeine Intake Calculator
This caffeine calculator helps you estimate a practical dose based on body weight, tolerance, and the job you need caffeine to do.
Instead of guessing, you can use the range to decide whether you need a small precision dose for studying or a higher pre-workout dose while still respecting the 400mg daily ceiling.
How To Use This Tool
- Enter your body weight and choose kilograms or pounds.
- Pick your caffeine tolerance and your goal.
- Add any caffeine you have already consumed today to see what range is still available.
1 coffee is roughly 95mg.
Your recommended dose
For a 70kg body weight and medium tolerance, a practical dose for focus & study is 88-123mg.
That equals about 1.1-1.5 Smart Caffeine sachets at 80mg each.
Take it 15-20 minutes before your first focused block so alertness peaks during deep work.
FAQ
How much caffeine is safe per day?
For most healthy adults, 400mg per day is the standard upper limit commonly used by regulators and health organizations.
Is mg per kg the best way to dose caffeine?
It is a practical starting point because body size changes how stimulating a dose feels, but sensitivity and timing still matter.
Why does the tool mention Smart Caffeine sachets?
Because each sachet is a fixed 80mg dose, it makes translating an mg recommendation into a real serving much easier.
