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Weekly Weight-Loss Rate Calculator — is your pace safe?
How fast is too fast? This calculator turns your total weight-loss percentage into a weekly rate — total % divided by the weeks it took — and grades it with a traffic light against the commonly cited safe band of about 0.5–1% of body weight per week: green inside the range, amber above it. Enter your starting weight, your current weight, and how many weeks have passed, and you will see both your overall percentage lost and your weekly pace. Faster is not better: very rapid loss tends to include more muscle and water than fat, and it is harder to sustain, so a steadier pace usually holds better. This is general information, not medical advice — talk to a clinician before making big changes, especially if you take medication for diabetes or blood pressure.
Weekly rate = total % lost ÷ weeks elapsed
- Safe range ≈ 0.5–1% of body weight per week (green); above ~1% flags amber
- Rapid loss can be muscle and water, not just fat — steadier tends to hold better
Frequently asked questions
What is a safe weekly weight-loss rate?
A commonly cited safe range is about 0.5–1% of your body weight per week. This tool computes your weekly rate (total percentage lost ÷ weeks) and grades it green inside that band and amber above roughly 1%/week. It is a guide, not a rule — this is general information, not medical advice.
Is losing 1% of body weight per week too much?
About 1%/week sits at the top of the commonly cited safe range, so it is generally considered acceptable but on the faster side. Consistently exceeding it can mean losing more muscle and water rather than fat, and it is harder to sustain. If your rate is repeatedly amber, easing the deficit often protects muscle and makes the loss stick.