Losertown Weight Loss Calculator
Calculate your weight loss journey timeline and calorie needs based on your personal metrics and goals.
How to Use This Calculator
- Enter your current weight and target weight in pounds
- Input your height in inches and your age
- Select your gender and activity level
- Choose your weekly weight loss goal (0.5-2 lbs per week)
- Adjust your planned daily calorie intake using the slider
- Click Calculate to see your projected weight loss timeline
Formula Used
BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(years) + s
Where:
- BMR = Basal Metabolic Rate (calories burned at rest)
- s = +5 for males, -161 for females
- Daily Calories = BMR × Activity Factor
- Weight Loss = (Daily Calories - Food Intake) ÷ 3500
Example Calculation
Real-World Scenario:
Sarah, a 35-year-old female who is 5'6" tall and weighs 180 lbs wants to reach 150 lbs.
Given:
- Current Weight = 180 lbs (81.6 kg)
- Target Weight = 150 lbs (68 kg)
- Height = 66 inches (167.6 cm)
- Age = 35 years
- Gender = Female
- Activity Level = Moderate
Calculation:
BMR = 10 × 81.6 + 6.25 × 167.6 - 5 × 35 - 161 = 1,561 calories/day
Daily Calories with Activity = 1,561 × 1.55 = 2,420 calories/day
With a daily intake of 1,700 calories, Sarah creates a deficit of 720 calories/day
Weekly weight loss = (720 × 7) ÷ 3,500 = 1.44 lbs/week
Result: It will take approximately 21 weeks (about 5 months) to reach her goal weight.
Why This Calculation Matters
Practical Applications
- Setting realistic weight loss goals
- Creating sustainable meal plans
- Understanding the relationship between calories and weight
Key Benefits
- Avoids unhealthy rapid weight loss
- Helps maintain muscle mass during weight loss
- Creates a timeline for accountability
Common Mistakes & Tips
Frequently Asked Questions
References & Disclaimer
Medical Disclaimer
This calculator provides estimates based on standard formulas and should not replace professional medical advice. Consult with a healthcare provider before starting any weight loss program, especially if you have underlying health conditions. The results are estimates and individual results may vary.
References
- CDC Healthy Weight - Losing Weight - Evidence-based guidelines for healthy weight loss from the Centers for Disease Control and Prevention
- NHLBI Aim for a Healthy Weight - National Heart, Lung, and Blood Institute resources on healthy weight management
- Mayo Clinic Weight Loss Basics - Expert medical advice on healthy weight loss strategies
Accuracy Notice
This calculator uses the Mifflin-St Jeor equation to estimate BMR, which is considered more accurate than the Harris-Benedict equation for most individuals. However, individual metabolic rates can vary significantly due to genetics, body composition, and other factors. The calculator provides estimates that should be used as a starting point for your weight loss journey.
About the Author
Kumaravel Madhavan
Web developer and data researcher creating accurate, easy-to-use calculators across health, finance, education, and construction and more. Works with subject-matter experts to ensure formulas meet trusted standards like WHO, NIH, and ISO.