Free calculators for nutrition, dieting and daily life
Calculate calories, macros, protein targets, deficit timing, keto suitability and portion nutrition directly in your browser. These tools give quick estimates – in Athletic-AI you can later plan and track more precisely.
What tools are included?
These calculators help you quickly estimate common nutrition questions. They do not replace individual advice, but they provide useful starting points for calories, macros and portions.
Calories & Macros
Estimates BMR, maintenance calories and rough macro targets for fat loss, maintenance or muscle gain.
Zum Rechner → 📉Deficit and cut calculator
Roughly estimates how long a target weight could take with a chosen daily calorie deficit.
Zum Rechner → 🥑Keto quick check
Calculates net carbs and indicates whether a meal or day roughly fits a keto range.
Zum Rechner → 🍽️Portion calculator
Scales nutrition values from 100 g to your actual portion size.
Zum Rechner → 💪Protein target
Estimates a sensible daily protein range based on your goal.
Zum Rechner →Use the calculators
All results are estimates. Body weight, lifestyle, training, digestion, water weight and individual differences can affect real outcomes.
Calories & Macros
Quick rough estimate for calories and macros.
Deficit / Cut Planner
Roughly estimate how long it may take to reach your target weight.
Keto Quick Check
Quickly check whether a meal or food is roughly keto-friendly.
Portion Calculator
Convert nutrition values from 100 g to your portion.
Protein Target
Estimate a sensible daily protein target.
Important note
The results are not a medical diagnosis or personal nutrition advice. Use them as orientation and track your progress over several weeks.
From rough estimates to real planning
The public tools help with quick calculations. In Athletic-AI you can later connect these values with your diary, recipes, pantry, shopping list, body data and statistics.
- Ernährungstagebuch
- Kalorien- und Makroziele
- Rezepte und Mahlzeiten
- Einkaufsliste
- Vorratskammer
- Körperdaten und Fortschritt