Calorie Deficit Equation:
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The Calorie Calculator With Goal Weight helps determine the daily calorie intake needed to reach your target weight within a specified timeframe, based on your current TDEE (Total Daily Energy Expenditure) and the energy deficit required for weight loss.
The calculator uses the calorie deficit equation:
Where:
Explanation: The equation calculates the daily calorie deficit needed to lose the difference between current and goal weight, accounting that 1kg of fat equals approximately 7700 kcal.
Details: Creating an appropriate calorie deficit is essential for healthy and sustainable weight loss. Too large a deficit can lead to muscle loss and metabolic slowdown.
Tips: Enter your accurate TDEE (use a TDEE calculator if unsure), current weight in kg, goal weight in kg, and realistic timeframe in days. All values must be positive numbers.
Q1: How accurate is the 7700 kcal per kg rule?
A: It's an estimate as fat tissue contains about 87% lipids, equating to approximately 7700 kcal per kg. Individual results may vary slightly.
Q2: What's a safe rate of weight loss?
A: Generally 0.5-1 kg per week is considered safe and sustainable for most people.
Q3: Should I adjust my calories as I lose weight?
A: Yes, as you lose weight your TDEE decreases, so you should recalculate periodically.
Q4: What if the calculator suggests very low calories?
A: Never go below 1200 kcal/day (women) or 1500 kcal/day (men) without medical supervision.
Q5: Does this account for muscle loss?
A: No, the calculation assumes fat loss. Including strength training and adequate protein can help preserve muscle mass.