The NHS recommends losing 0.5 kg to 1 kg a week; the CDC recommends 1 to 2 pounds a week. Since 1 kg is 2.2 lb, these are effectively identical. Both say gradual, steady weight loss is safer and more likely to last, and both use the same adult BMI categories (healthy 18.5–24.9).
NHS vs CDC side by side
| Topic | NHS / NICE (UK) | CDC (USA) |
|---|---|---|
| Safe weekly loss | 0.5 – 1 kg (1 – 2 lb) | 1 – 2 lb (0.45 – 0.9 kg) |
| Daily calorie deficit | About 600 kcal (NICE guide) | 500 – 1,000 kcal commonly cited |
| First goal | Lose 5–10% of body weight | Losing 5–10% can bring health benefits |
| Healthy BMI | 18.5 – 24.9 | 18.5 – 24.9 |
| Ethnicity cut-offs | Lower: 23 and 27.5 for some groups | Not used in standard CDC categories |
| Waist check | Waist-to-height ratio under 0.5 | Waist circumference (>35 in women, >40 in men) |
| Activity | 150 min moderate + 2 days strength | 150 min moderate + 2 days strength |
| Units | kg, stones, kcal | pounds, Calories |
Why both recommend gradual weight loss
Both organisations point to the same evidence: people who lose weight gradually and steadily are more likely to keep it off, keep more muscle and have fewer side effects. Rapid weight loss is reserved for supervised programmes.
Converting between kg and pounds
| Per week | Per month (≈4.3 weeks) | In 3 months |
|---|---|---|
| 0.5 kg = 1.1 lb | ≈ 2.2 kg (4.8 lb) | ≈ 6.5 kg (14 lb, 1 stone) |
| 1 kg = 2.2 lb | ≈ 4.3 kg (9.5 lb) | ≈ 13 kg (29 lb, 2 stone) |
Which advice should I follow in the UK?
In the UK, follow NHS and NICE guidance. It includes the lower BMI thresholds for people of South Asian, Chinese, other Asian, Middle Eastern, Black African and African-Caribbean background, and links to free NHS services such as the NHS Weight Loss Plan app and GP-referred weight management programmes.
Frequently asked questions
What does the CDC say about losing weight safely?
The CDC says that people who lose weight gradually and steadily – about 1 to 2 pounds per week – are more successful at keeping the weight off.
Is the NHS advice the same as the CDC advice?
Essentially yes. 0.5 to 1 kg a week (NHS) is the same as about 1 to 2 lb a week (CDC).
Do the NHS and CDC use the same BMI ranges?
Yes, the standard adult ranges are the same. The NHS/NICE also use lower thresholds for some ethnic groups.
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Medical disclaimer: this guide is general information for adults and is not a diagnosis or medical advice. bmicalculatornhs.net is independent and not affiliated with the NHS. Speak to your GP, pharmacist or another qualified health professional about your own health. Full disclaimer.