What is a macro calculator?

A macro calculator estimates how many grams of protein, carbohydrates, and fat you should eat each day based on your weight, height, age, sex, activity level, and goal. kkal.ai uses the Mifflin-St Jeor equation to calculate BMR, multiplies by an activity factor to get TDEE, then splits the calorie target into macro grams.

How accurate is the Mifflin-St Jeor equation?

The Mifflin-St Jeor equation is considered the most accurate predictive equation for resting metabolic rate in healthy adults. A 2005 Academy of Nutrition and Dietetics review found it predicted RMR within 10% of measured values in roughly 82% of non-obese adults.

Is kkal.ai free to use?

Yes. The kkal.ai macro calculator, BMR calculator, and AI meal photo analyzer are free to use on the web. No account is required to use the standalone calculators.

What macro split should I use for weight loss?

kkal.ai recommends 40% protein, 40% carbohydrates, and 20% fat for weight loss. Higher protein intake helps preserve lean muscle in a calorie deficit and increases satiety. For maintenance or muscle gain, a 30/45/25 split is the default.

How does kkal.ai analyze meal photos?

kkal.ai uses GPT-4 Vision to identify foods in an uploaded photo, then estimates calories, protein, carbohydrates, and fat per item based on visible portion sizes and standard nutrition data.

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health · 2024-01-05 · 6 min read · by kkal.ai Editorial

The Importance of Hydration: How Much Water Do You Really Need?

Explore the science behind proper hydration and learn practical strategies to maintain optimal fluid balance throughout the day.

Water is essential for virtually every function in your body, yet many people don't drink enough to maintain optimal hydration. Understanding your hydration needs can significantly impact your health and performance.

Why Hydration Matters

Water plays crucial roles in:

Temperature regulation through sweating
Joint lubrication and cushioning
Nutrient transportation
Waste elimination through kidneys
Maintaining blood pressure

How Much Water Do You Need?

The traditional "8 glasses a day" rule is overly simplistic. Your needs depend on:

Body size and composition
Activity level and exercise intensity
Climate and environmental conditions
Overall health status
Pregnancy or breastfeeding

A better guideline is 35-40ml per kg of body weight daily, adjusted for activity and climate.

Signs of Dehydration

Watch for these warning signs:

Dark yellow urine
Feeling thirsty or dry mouth
Fatigue or dizziness
Headaches
Constipation

Hydration Strategies

Start your day with a glass of water
Keep a water bottle with you
Eat water-rich foods like fruits and vegetables
Monitor urine color as a hydration indicator
Increase intake during exercise and hot weather