Calorie Deficit Calculator - Find Your Daily Target to Lose Weight
Input your stats below to calculate the exact daily calorie deficit needed to reach your weight loss goals safely and effectively.
Your Details
Calculate Your Deficit
Enter your stats to find out exactly how many calories you should eat to reach your weight loss goals.
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Written by Ketan Chandore Manually Verified
Founder of PineToolsHub. The formulas in this calculator have been manually verified against WHO (World Health Organization) calorie guidelines and NIDDK (National Institute of Diabetes and Digestive and Kidney Diseases) standards for safe weight loss.
What Is a Calorie Deficit?
A calorie deficit is when you eat fewer calories than your body burns. For example, if you burn 2,500 calories per day but eat 2,000, you have a 500-calorie deficit. Over time, this deficit leads to weight loss because your body is forced to burn stored fat for energy.
How to Use This Calculator
- Enter your age, gender, and height. This helps establish your basal metabolic rate.
- Enter your current weight.
- Select your activity level (sedentary, lightly active, moderately active, very active).
- Choose your goal (lose 0.5 lb/week, 1 lb/week, 2 lb/week).
- Click "Calculate".
- See your daily calorie target and exactly how long it will take to reach your goal!
Note: If you want to dive deeper into your daily burn, you can also use our TDEE Calculator or estimate your current body composition with our Body Fat Calculator.
How Many Calories Should You Cut?
| Goal | Daily Deficit | Weekly Loss |
|---|---|---|
| Lose 0.5 lb/week | -250 calories | 0.5 lb |
| Lose 1 lb/week | -500 calories | 1 lb |
| Lose 2 lb/week | -1,000 calories | 2 lb |
Note: 1 pound of body fat = ~3,500 calories. So a 500-calorie daily deficit = 1 lb/week.
Is Your Calorie Deficit Safe?
- Never go below 1,200 calories/day for women, unless under strict medical supervision.
- Never go below 1,500 calories/day for men.
- Extreme deficits (>1,000 cal/day) can slow your metabolism, leading to a "yo-yo" effect where you quickly regain weight once you stop dieting.
- Consult a doctor or registered dietitian before starting any new diet or significant calorie restriction.
Frequently Asked Questions
What's the difference between TDEE and calorie deficit?
TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in a day to maintain your current weight. A calorie deficit is when you consume fewer calories than your TDEE, forcing your body to burn stored fat.
Can I lose weight without counting calories?
Yes, by eating mostly whole foods, increasing protein and fiber, and exercising, you might naturally enter a calorie deficit. However, counting calories guarantees you are in a deficit, making weight loss mathematically certain.
Is a 500-calorie deficit safe?
Yes, a 500-calorie deficit is widely recommended by health professionals as a safe and sustainable target. It generally results in a healthy weight loss of about 1 pound per week.
How long does it take to see results?
With a consistent calorie deficit, you will typically start seeing numbers drop on the scale within the first 1 to 2 weeks. Noticeable physical changes in the mirror usually take 3 to 4 weeks.
What if my deficit is too aggressive?
An aggressive deficit (eating far too few calories) can cause extreme fatigue, muscle loss, nutrient deficiencies, and actually slow your metabolism down over time. It's best to stick to a moderate deficit.