What is a safe rate of weight loss per week?

Most health authorities recommend losing no more than 0.5–1 kg (1–2 lbs) per week. Faster rates often result in muscle loss, nutrient deficiencies, and metabolic adaptation. A moderate pace of 0.5 kg per week is sustainable for most people and preserves lean mass when combined with adequate protein intake.

How many calories do I need to cut to lose weight?

One kilogram of fat is approximately 7,700 calories. To lose 0.5 kg per week, you need a daily deficit of about 550 calories. This can come from reducing food intake, increasing activity, or a combination of both. Tracking calories with an app can help maintain the deficit consistently.

Why does weight loss slow down over time?

As you lose weight, your body requires fewer calories to function, so your original deficit shrinks. Additionally, hormonal adaptations can reduce metabolic rate. This is called metabolic adaptation. Adjusting calories or increasing activity periodically helps overcome these plateaus.

Can this calculator be used for muscle gain goals?

Yes. Select the Gain Muscle goal type and enter a realistic weekly gain rate — typically 0.25 kg for natural trainees after the initial adaptation phase. Muscle gain is slower than fat loss; expecting 0.5 kg per week of pure muscle is unrealistic for most people without performance-enhancing substances.

Fitness Goal Timeline Calculator - How Long to Reach Your Goal

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Fitness Goal Timeline Calculator

Find out how many weeks or months it will take to reach your target weight or body fat based on your weekly calorie deficit or surplus.

Unit System

Goal Type

Current Weight

lbs

Target Weight

lbs

Weekly Change Rate

Frequently Asked Questions

The calculator divides the total weight difference by your selected weekly change rate to estimate the number of weeks needed. It then converts that to months and projects a target date. This assumes a consistent weekly deficit or surplus driven by diet and exercise.

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