Determine your ketogenic diet macronutrient targets. The keto diet typically consists of 70-75% fat, 20-25% protein, and 5-10% carbohydrates to maintain ketosis. Enter your details to get personalized daily gram targets.
The ketogenic diet is a high-fat, very-low-carb eating approach that shifts the body's primary fuel from glucose (carbohydrates) to ketones (produced from fat) — a metabolic state called ketosis. The standard macronutrient ratio is approximately 70–75% calories from fat, 20–25% from protein, and 5–10% from carbohydrates. For a 2,000-calorie target, this works out to roughly 156g fat, 100g protein, and 25g carbs per day — dramatically different from a typical American diet (40-50% carbs, 15-20% protein, 30-35% fat).
Originally developed in the 1920s as a medical treatment for drug-resistant epilepsy (still a recognized clinical use), keto gained popular adoption in the 2010s as a weight-loss approach. The mechanism for weight loss isn't magical — keto works mostly through appetite suppression (high-fat, high-protein meals are satiating), reduced insulin levels (which can support fat mobilization), and the simple fact that eliminating most carb sources reduces total calorie intake for many people. Research shows keto produces similar long-term weight loss to other calorie-controlled diets, but with different adherence patterns and side effect profiles.
This calculator converts a daily calorie target into specific gram targets for fat, protein, and carbs using keto macro ratios. The default is 5% carbs, 25% protein, 70% fat — the standard "strict keto" ratio for maintaining ketosis. Some variants (cyclical keto, targeted keto, dirty keto) modify these ratios. Note: keto is one approach among many. The "best" diet is the one you can sustain long-term while meeting your health goals. Keto works well for some people and poorly for others.
Female, 35, sedentary, target 1,500 calories (modest deficit), 5% carbs, 25% protein. Carbs: 1,500 × 0.05 / 4 = 19g/day Protein: 1,500 × 0.25 / 4 = 94g/day Fat: 1,500 × 0.70 / 9 = 117g/day Sample day: 3 eggs + bacon for breakfast (~24g protein, 22g fat). Cobb salad with chicken, blue cheese, bacon, avocado (~35g protein, 35g fat, 6g carb). Salmon dinner with cauliflower mash (~35g protein, 45g fat, 8g carb). Cheese stick snack (~6g protein, 7g fat). Typical weight loss on keto: 1-2 lbs/week initially (some water weight in first 1-2 weeks), then 0.5-1.5 lbs/week sustained.
Male, 30, active (lifting 4x/week), target 2,500 calories, 5% carbs, 30% protein (higher for muscle retention). Carbs: 2,500 × 0.05 / 4 = 31g/day Protein: 2,500 × 0.30 / 4 = 188g/day Fat: 2,500 × 0.65 / 9 = 181g/day Higher protein supports muscle retention during fat loss but slightly reduces the strict "high-fat" character of standard keto. Some practitioners argue protein above 30% can occasionally bump out of ketosis via gluconeogenesis; others find no issue at higher protein levels. For muscle-building goals specifically, traditional bodybuilding diets (higher carb, moderate fat) often outperform keto. Keto is more compatible with fat loss while preserving muscle than with active muscle building.
Person trying keto for the first time, 2,000 calories, 10% carbs, 25% protein. Carbs: 2,000 × 0.10 / 4 = 50g/day Protein: 2,000 × 0.25 / 4 = 125g/day Fat: 2,000 × 0.65 / 9 = 144g/day 50g of carbs is at the upper edge of ketosis for many people — may or may not produce ketosis depending on individual sensitivity. But this "modified" or "lazy" keto is easier to follow long-term and still provides many of the satiety and weight-loss benefits. For long-term sustainability, modified keto (or generic low-carb at 50-100g carbs) is often a better fit than strict ketosis. The diet you can sustain for years beats the perfect diet you abandon in two months.
Use this calculator when starting a keto diet, adjusting macros after weight loss or change in activity level, or transitioning from strict keto to a modified approach. Macro tracking is essential for keto success — without it, most people accidentally eat more carbs than they realize and don't enter or maintain ketosis.
Keto can be useful for: weight loss (when adherent), epilepsy treatment (medical use under physician supervision), some metabolic syndrome and Type 2 diabetes management (improves insulin sensitivity), and some athletes in specific sports (endurance athletes adapted to fat as primary fuel).
Keto is less appropriate for: pregnant or breastfeeding women, children (except medically supervised epilepsy treatment), those with pancreatic or gallbladder issues, those with kidney disease, people with eating disorder history, and individuals who simply find it unsustainable.
Pair this with the calorie calculator (for daily calorie target), the BMR/TDEE calculator (for baseline metabolism), the macro calculator (general macro planning beyond keto), the protein calculator (for protein adequacy), and the BMI/body-fat calculators (for body composition tracking during keto).
A few practical realities about keto:
1. **Adaptation period is real.** First 1-2 weeks often include "keto flu" — fatigue, brain fog, headaches, mood changes. Adequate electrolytes (especially sodium — many people need 3-5g/day) and patience are key.
2. **Hidden carbs are everywhere.** Sauces, dressings, "low-carb" packaged foods, and most restaurant menus contain more carbs than expected. Track everything for the first few weeks to learn carb counts.
3. **Quality varies.** "Dirty keto" (processed meat, fast food cheeseburgers without buns, packaged keto snacks) can technically hit macros while being nutritionally poor. "Clean keto" emphasizes whole foods (fatty fish, eggs, leafy greens, avocados, nuts, quality meats, olive oil).
4. **Long-term safety is debated.** Short-term keto (3-6 months) is well-studied and generally safe for healthy adults. Long-term (5+ years) data is more limited and mixed — some studies show benefits, others suggest cardiovascular concerns from very high saturated fat intake.
5. **Calorie deficit still matters.** Keto doesn't magically allow unlimited calories. You can gain weight on keto by overeating fat. The diet's benefit is often that high-fat/high-protein meals are satiating, leading to spontaneous calorie reduction — but calorie tracking confirms whether actual deficit exists.
6. **The "right" diet varies by individual.** Some people thrive on keto; others feel terrible. Mediterranean, plant-based, intermittent fasting, and traditional calorie-controlled approaches all work for different people. Try keto for 6-8 weeks, then assess honestly.
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Fat
156g
70% (1400 cal)
Protein
125g
25% (500 cal)
Carbs
25g
5% (100 cal)
Net Carb Target
18g