Use this weight loss calorie calculator to estimate how many calories you should eat daily to lose fat at a steady, realistic pace. It uses your body stats, activity level, and preferred calorie deficit to give you a practical target.
Weight Loss Calorie Calculator
Estimate maintenance calories, fat-loss calories, and expected weekly weight change.
What this weight loss calorie calculator actually tells you
Most people ask one simple question: “How many calories should I eat to lose weight?” The answer starts with your maintenance calories (also called TDEE), then subtracts a deficit based on your goal pace. This calculator gives you both numbers:
- BMR: Calories your body needs at complete rest.
- TDEE: Estimated daily calories to maintain current weight.
- Target calories: A suggested daily intake for fat loss.
How the formula works
1) Basal Metabolic Rate (BMR)
The calculator uses the Mifflin-St Jeor equation, one of the most widely used and practical equations in nutrition coaching:
- Men: 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
- Women: 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
2) Total Daily Energy Expenditure (TDEE)
Your BMR is multiplied by your activity level to estimate how many calories you burn in a normal day. This includes movement, workouts, and basic daily tasks.
3) Weight loss calorie target
The chosen deficit is subtracted from TDEE. A larger deficit can speed weight loss, but also raises hunger and recovery challenges. The best target is usually the one you can sustain for months, not days.
How to use your results in real life
- Track your intake for 2-3 weeks and compare trend weight changes.
- If weight is not dropping after consistent tracking, reduce intake by 100-200 kcal/day.
- If energy, sleep, and training performance crash, increase calories slightly.
- Recalculate every 5-10 pounds (2-5 kg) lost.
Macro guidelines after calories are set
Protein
For muscle retention during fat loss, aim for roughly 1.6-2.2 g protein per kg body weight daily.
Fat
Keep at least 0.6-0.8 g fat per kg body weight for hormonal health and satiety.
Carbs
Fill the rest of your calories with carbohydrates to support workouts, steps, and recovery.
Common mistakes with calorie calculators
- Choosing an activity level that is too high.
- Not weighing food accurately.
- Ignoring liquid calories and weekend overeating.
- Expecting linear fat loss every week.
- Dropping calories too low too quickly.
Frequently asked questions
How fast should I lose weight?
A good general range is about 0.5% to 1.0% of body weight per week. Faster loss can work short term for some, but slower is often easier to sustain and better for training quality.
Should I eat back exercise calories?
Usually no, unless your workouts are long and intense and your performance is dropping. Most trackers overestimate burn, so be conservative.
Do I need perfect accuracy?
No. You need consistency. Even if the starting estimate is off, steady tracking and small adjustments will dial you in quickly.
Final note
This weight loss calorie calculator gives you a strong starting point, not a medical diagnosis. If you have a history of eating disorders, metabolic disease, pregnancy, or take medication affecting weight, work with a qualified physician or registered dietitian.