Déficit calórico keto
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
(Δkg × 7700) / déficit
About this calculator
The keto calorie deficit calculator estimates the time needed to lose weight on a ketogenic diet. It uses the formula (Δkg × 7700) / daily deficit, where 1 kg of fat equals 7700 kcal. Perfect for controlled weight loss, input your target weight loss in kg and desired daily calorie deficit.
It calculates the total energy to burn to reach your goal. For example, to lose 2 kg in 35 days, the required deficit would be (2 × 7700) / 35 = 440 kcal. The deficit must be realistic to avoid health risks.
Use it to plan intermittent fasting or adjust intake. Caution: Excessive deficit may cause fatigue, increased cortisol, or muscle loss. Recommended deficits are 300-500 kcal/day for safety and effectiveness.
Frequently asked questions
What is the minimum recommended deficit?
The deficit should not be less than 300 kcal/day, as it may result in slow and unsustainable weight loss.
How long until I see results?
Depends on the deficit: 500 kcal/day may take 1 kg/month, while 1000 kcal/day can reach 2 kg/month.
Can I use this calculator to gain weight?
No, it's designed for deficit calculations. For weight gain, use a calorie surplus calculator.
What if the deficit is too high?
Reduce it to avoid fatigue, increased cortisol, or muscle loss. Prioritize health over speed.