Cafeína Performance
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The caffeine performance calculator helps determine the ideal dose of caffeine to improve physical performance. Caffeine is a stimulating substance that can increase energy, concentration, and muscle endurance. The recommended dose is 3 to 6 mg/kg of body weight, about 30 minutes before exercise.
The formula used is simple: body weight in kg multiplied by the desired dose of caffeine in mg/kg. For example, a person weighing 70 kg who wants to consume 4 mg/kg of caffeine should ingest 280 mg of caffeine. It's essential to remember that sensitivity to caffeine varies from person to person.
Caffeine can be found in foods and beverages such as coffee, tea, soft drinks, and supplements. However, it's crucial to be mindful of the amount consumed, as excessive doses can cause side effects like nervousness, insomnia, and increased blood pressure.
It's recommended that athletes and exercise practitioners consult a healthcare professional before using caffeine as a supplement, especially if they have pre-existing medical conditions or are taking other medications.
Frequently asked questions
What is the recommended dose of caffeine to improve physical performance?
The recommended dose is 3 to 6 mg/kg of body weight, about 30 minutes before exercise.
How do I calculate the dose of caffeine I should consume?
Multiply your body weight in kg by the desired dose of caffeine in mg/kg. For example, if you weigh 70 kg and want to consume 4 mg/kg, you should ingest 280 mg of caffeine.
What are the side effects of excessive caffeine consumption?
Excessive doses of caffeine can cause side effects such as nervousness, insomnia, and increased blood pressure.
Can I consume caffeine if I have pre-existing medical conditions?
It's recommended to consult a healthcare professional before using caffeine as a supplement, especially if you have pre-existing medical conditions or are taking other medications.
Where can I find caffeine?
Caffeine can be found in foods and beverages such as coffee, tea, soft drinks, and supplements.