Skip to content
MyHealthCalculate
Contact
Calorie Deficit

Calorie Deficit Calculator

Determine the daily calorie intake target required to lose weight at your preferred pace.

Calorie Deficit Planner

Enter your daily energy expenditure and choose your target deficit details.

kcal/day

Don't know your TDEE? Calculate it using our TDEE Calculator.

kcal

Understanding Calorie Deficit for Weight Loss

The principle of weight loss is rooted in thermodynamics: energy balance. To lose weight, you must consume less energy than your body expends. Your daily expenditure is known as TDEE. Subtracting calories from this baseline creates a deficit, prompting the body to oxidize stored adipose tissue (fat) for energy.

According to traditional metabolic research, one pound of adipose tissue stores roughly 3,500 calories. Therefore, a daily deficit of 500 calories theoretically translates to one pound of fat loss per week. However, modern clinical research indicates that dynamic metabolic adaptation plays a role, and progress can slow down as body composition changes.

Tips for Safe and Sustainable Calorie Tracking

  • Keep it moderate: Aim for a deficit of 15% to 20% of your TDEE. Large deficits are difficult to maintain and can cause fatigue and muscle wasting.
  • Prioritize protein: High protein intake helps maintain lean muscle tissue while losing fat. Check your requirements with our Protein Calculator.
  • Track macros: Distribute your remaining calories among healthy fats and carbohydrates using our Macro Calculator.

Frequently asked questions.

A calorie deficit occurs when you consume fewer calories than your body burns over a given period. This forces your body to use stored energy (mostly body fat) to meet its metabolic needs, leading to weight loss.
It is calculated by subtracting your desired deficit (e.g., 500 calories) from your Total Daily Energy Expenditure (TDEE). If your TDEE is 2,500 calories, a 500-calorie deficit results in a daily intake target of 2,000 calories.
A safe and sustainable deficit is typically 300 to 500 calories per day, which translates to roughly 0.6 to 1 pound of weight loss per week. Deficits should generally not exceed 1,000 calories per day, and daily intake should not drop below 1,200 calories for women or 1,500 calories for men without medical supervision.