How are the protein grams calculated in this keto calculator?

Protein is based on your estimated lean body mass, which is calculated from your height, weight, and sex using the Boer formula. The result is expressed as grams of protein per kilogram of lean body mass, with options of 1.2 g/kg, 1.5 g/kg, or 1.8 g/kg.

What is the difference between the net carb options 20g, 30g, 40g, and 50g?

Net carbs mean total carbs minus dietary fiber, because fiber does not raise blood sugar. Twenty grams is a strict starting point for ketosis, while 50 grams is more flexible; most people use 20-50 g of net carbs per day depending on their goals.

Can this calculator be used for weight gain or only weight loss?

Yes, the calculator supports three goals: Lose weight, Maintain weight, and Gain muscle. Selecting Gain muscle will adjust the calorie target upward based on your activity level and goals.

Does the tool account for dietary fiber when showing carb targets?

Yes, the calculator defines net carbs as total carbs minus dietary fiber. The net carb options (20g-50g) represent the amount of digestible carbohydrates you should aim for each day.

Nutrition & DietTool Review

Keto Calculator

Provided bySmartCalcsmartcalc.top

Free keto calculator: enter your body stats, activity level and goal to get a calorie target plus daily net-carb, pro...

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About this tool

What Keto Calculator does

A keto calculator that determines personalized daily calorie and macronutrient targets for a ketogenic diet. Users input age, sex, height, weight, activity level, and goal (lose, maintain, or gain weight) to receive a calorie target and grams of net carbohydrates, protein, and fat. The tool uses the Mifflin-St Jeor equation to estimate TDEE and the Boer formula to calculate lean body mass, then applies standard keto ratios of roughly 70-75% fat, 15-20% protein, and 5-10% carbs. It also lets users select a net carb preference from 20 to 50 grams per day, with 20g labeled as a strict starting point and 50g as more flexible.

Step by step

How to use the SmartCalc Keto Calculator

1
Select your sex (Female or Male) and enter your age in years.
2
Input your height in centimeters and weight in kilograms, then choose your activity level from Sedentary to Extra active.
3
Pick your dietary goal: Lose weight, Maintain weight, or Gain muscle.
4
Choose your daily net carb preference from the options 20g, 30g, 40g, or 50g.
5
View the instant results showing your daily calorie target plus grams of net carbs, protein, and fat.

Is it right for you

Best for

Individuals starting a ketogenic diet who want a quick, formula-based estimate of their calorie and macronutrient needs without manual calculations.

Limitations

Results are estimates based on standard equations and may not suit every individual's metabolism.
No option to input custom macro percentages; the tool uses fixed keto ratios.
Lean body mass is estimated from height, weight, and sex; results may vary for very muscular or very lean users.

Questions

Keto Calculator FAQ

How are the protein grams calculated in this keto calculator?: Protein is based on your estimated lean body mass, which is calculated from your height, weight, and sex using the Boer formula. The result is expressed as grams of protein per kilogram of lean body mass, with options of 1.2 g/kg, 1.5 g/kg, or 1.8 g/kg.
What is the difference between the net carb options 20g, 30g, 40g, and 50g?: Net carbs mean total carbs minus dietary fiber, because fiber does not raise blood sugar. Twenty grams is a strict starting point for ketosis, while 50 grams is more flexible; most people use 20-50 g of net carbs per day depending on their goals.
Can this calculator be used for weight gain or only weight loss?: Yes, the calculator supports three goals: Lose weight, Maintain weight, and Gain muscle. Selecting Gain muscle will adjust the calorie target upward based on your activity level and goals.
Does the tool account for dietary fiber when showing carb targets?: Yes, the calculator defines net carbs as total carbs minus dietary fiber. The net carb options (20g-50g) represent the amount of digestible carbohydrates you should aim for each day.

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