Calculator
Formula Used
The calculator uses the Mifflin-St Jeor equation for basal metabolic rate.
Male BMR: 10 × weight kg + 6.25 × height cm - 5 × age + 5
Female BMR: 10 × weight kg + 6.25 × height cm - 5 × age - 161
Maintenance calories: BMR × activity factor
Target calories: maintenance calories - calorie deficit
Protein grams: body weight kg × protein factor
Net carb calories: net carbs × 4
Fat grams: (target calories - protein calories - carb calories) ÷ 9
Estimated weekly loss: daily deficit × 7 ÷ 7700 for kilograms.
How to Use This Calculator
- Select your unit system.
- Enter your sex, age, weight, and height.
- Choose your activity level.
- Set a calorie deficit for weight loss.
- Enter your preferred daily net carb target.
- Add planned fiber to estimate total carbs.
- Set protein grams per kilogram of body weight.
- Press the calculate button.
- Review calories, net carbs, protein, and fat.
- Download your result as CSV or PDF.
Example Data Table
| Profile | Weight | Activity | Deficit | Net Carbs | Protein Factor | Use Case |
|---|---|---|---|---|---|---|
| Beginner keto | 80 kg | Light | 20% | 25 g | 1.8 g/kg | Simple weight loss start |
| Strict keto | 95 kg | Sedentary | 15% | 20 g | 1.6 g/kg | Lower carb tracking |
| Active dieter | 72 kg | Moderate | 18% | 35 g | 2.0 g/kg | Training support |
| Higher protein plan | 68 kg | Very active | 12% | 30 g | 2.2 g/kg | Lean mass focus |
Keto Carb Planning Guide
Why Keto Carb Targets Matter
A keto plan usually starts with controlled net carbs. Net carbs are total carbs minus fiber. This calculator gives a practical daily target. It also balances calories, protein, and fat. That balance matters for steady weight loss. Very low carbs may support ketosis. Still, calories decide the final rate. A clear number removes guesswork from meals. You can plan breakfast, lunch, and dinner better.
Building a Safe Deficit
Weight loss needs a calorie deficit. The tool estimates maintenance calories first. Then it applies your chosen deficit. A moderate deficit is easier to maintain. It may also protect training energy. Protein is kept high by design. This helps support lean body mass. Fat fills the remaining calorie budget. Carbs stay within your keto limit. The final table shows each macro clearly.
Using Net Carbs Daily
Net carbs can hide in sauces. They also appear in snacks and drinks. Read labels before adding packaged foods. Track vegetables, nuts, dairy, and sweeteners. Small servings can add up quickly. Divide the daily target by meals. That gives a simple meal allowance. Keep one small buffer for surprises. If progress slows, review weekly averages. Do not change targets every day.
Better Results With Consistency
Use the calculator as a planning tool. It is not medical advice. People with health conditions need professional guidance. Hydration and electrolytes also matter on keto. Sleep can affect hunger and cravings. Strength training may improve body composition. Walking can raise daily energy use. Measure progress with several signals. Use weight, waist, energy, and adherence. A single scale reading can mislead. Update inputs when body weight changes. Fresh numbers keep your plan realistic. CSV and PDF exports help record progress. They also make coaching notes easier. A clear plan is easier to repeat.
Reviewing Your Plan
Your carb limit should match your routine. Busy days may need easier meals. Prepare protein portions before hunger rises. Choose fats that fit your calories. Use fiber rich low carb foods. They can improve fullness and digestion. Compare planned numbers with real intake. The gap explains slow progress. Small corrections work better than resets. Sustainable routines win over perfect days.
FAQs
What are net carbs?
Net carbs are total carbohydrates minus fiber. Many keto plans track net carbs because fiber usually has a smaller blood sugar effect. Always check labels carefully.
How many net carbs should I eat on keto?
Many people start around 20 to 30 grams daily. Some active people can use more. Your best target depends on calories, activity, and consistency.
Can this calculator guarantee ketosis?
No calculator can guarantee ketosis. It can estimate a practical carb target. Ketosis also depends on food choices, activity, sleep, stress, and personal response.
Why does protein matter for weight loss?
Protein supports muscle, fullness, and recovery. A higher protein target may help protect lean mass while calories are reduced for fat loss.
Why is fat calculated last?
Carbs are limited first. Protein is set for body support. Fat then fills the remaining calories because it is the main energy source in keto plans.
What deficit should I choose?
A 10% to 25% deficit is common for many people. Larger deficits can be harder to maintain and may reduce energy or adherence.
Should I use total carbs or net carbs?
Many keto trackers use net carbs. Some people prefer total carbs for stricter control. Choose one method and track it consistently.
Is this calculator medical advice?
No. It is a planning tool. Ask a qualified health professional before starting keto, especially with diabetes, kidney disease, pregnancy, or medication use.