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Weight Loss Timeline Calculator

Enter your current weight, goal weight, and daily deficit to see exactly when you could reach your target.

Your Weight Loss Timeline

Estimated goal date
—
— weeks away
losing — per week
Total to lose
—
lb
Weekly loss
—
lb / week
Calories to burn
—
kcal total

Journey at a glance

Start 25% Halfway 75% Goal

Projected weight over time

Milestones

Milestone Weight Weeks Date
⚠ A 1,000 kcal/day deficit is the upper limit most health professionals recommend. Larger deficits risk muscle loss, fatigue, and nutritional gaps. Consider a gentler pace for sustainable results.

Based on 7,700 kcal per kg of fat (3,500 kcal per lb). Actual results vary with metabolism, adherence, and body composition changes over time.

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How does this calculator work?

This tool uses a simple but reliable model: one pound of body fat contains roughly 3,500 calories (7,700 kcal per kg). If you maintain a consistent daily calorie deficit, your body draws on stored fat to make up the difference.

Enter your current weight, goal weight, and how large a deficit you plan to maintain. The calculator divides the total calories to be burned by your daily deficit to estimate the number of days — and the exact date — you could reach your goal.

Real-world results vary. Metabolism adapts over time, adherence fluctuates, and water weight causes short-term swings. Use this timeline as a motivating target, not a guarantee.