138 KG in Stone
Conversion Result
138 KG in Stone
138 kg = 21 stone 10 pounds | 21.73 stone | 304.2 pounds
138 kg is 21 stone 10 pounds. Divide 138 by 6.35029 to get 21.732 stone - 21 stone with 10 pounds remaining. In pounds, 138 kg is 304.2 lbs. This weight crosses two significant thresholds simultaneously: it is above 300 pounds and above 21 stone. Both numbers carry psychological weight for many people who track their progress in either system. 138 kg sits 4.2 pounds above the 300 lb mark and 10 pounds above the 21 stone mark - making it a weight that is clearly into both milestones.
At 138 kg, all adults at every height are in the Class 2 or Class 3 obese BMI category. At 5ft 6in the BMI is 48.9, Class 3 obese. At 5ft 8in the BMI is 46.1, Class 3 obese. At 5ft 10in the BMI is 43.6, Class 3 obese. At 6ft 0in the BMI is 41.2, Class 3 obese. At 6ft 2in the BMI is 39.0, which falls just below the Class 3 threshold but is still Class 2 obese. The BMI at 138 kg does not fall below 39 at any commonly recorded adult height.
Doctor's Note - Add as Highlighted Blue Box
**Doctor's Note - Written by Dr Muhammad Usman, MBBS** _At 138 kg, I want patients to know clearly that the NHS/WHO has a full specialist pathway for weight management at this weight level, and that pathway is meaningfully different from general dietary advice. Tier 3 services combine dietetic support, physical activity guidance, and psychological support in a structured way that general practice cannot replicate in a ten-minute appointment. I try to make the referral as early as appropriate rather than waiting until a weight-related condition forces the issue. The evidence for earlier intervention producing better long-term outcomes is strong.
138 kg crosses both 300 lbs and 21 stone - by a narrow margin
300 pounds is 136.08 kg. 21 stone is 133.36 kg. 138 kg sits above both - it is 1.92 kg (4.2 lbs) above the 300 lb mark and 4.64 kg (10.2 lbs) above the 21 stone mark. In the nearby weights table, 136 kg at 21 stone 6 lb is 299.8 lbs - just under 300 lbs. At 138 kg you are confirmed past both milestones, with 140 kg (22 stone 1 lb, 308.6 lbs) being the next major reference point for tracking progress.
Is 138 KG a Healthy Weight?
All BMI values calculated manually. Formula: kg divided by height in metres squared.
| Height | KG | BMI | NHS/WHO Category |
|---|---|---|---|
| 5ft 0in (152cm) | 138 kg | 59.7 | Obese |
| 5ft 2in (157cm) | 138 kg | 56.0 | Obese |
| 5ft 4in (163cm) | 138 kg | 51.9 | Obese |
| 5ft 6in (168cm) ★ UK avg | 138 kg | 48.9 | Obese |
| 5ft 8in (173cm) | 138 kg | 46.1 | Obese |
| 5ft 10in (178cm) | 138 kg | 43.6 | Obese |
| 6ft 0in (183cm) | 138 kg | 41.2 | Obese |
| 6ft 2in (188cm) | 138 kg | 39.0 | Obese |
Weights Close to 138 KG
| Kilograms | Stone and Pounds | Decimal Stone | Pounds |
|---|---|---|---|
| 132 kg | 20 st 11 lb | 20.79 st | 291.0 lbs |
| 134 kg | 21 st 1 lb | 21.10 st | 295.4 lbs |
| 136 kg | 21 st 6 lb | 21.42 st | 299.8 lbs |
| 138 kg (this page) | 21 st 10 lb | 21.73 st | 304.2 lbs |
| 140 kg | 22 st 1 lb | 22.05 st | 308.6 lbs |
| 142 kg | 22 st 5 lb | 22.36 st | 313.1 lbs |
| 144 kg | 22 st 9 lb | 22.68 st | 317.5 lbs |
| 146 kg | 23 st 0 lb | 22.99 st | 321.9 lbs |
FAQs
How many stone is 138 kg?
138 kg is 21 stone 10 pounds, or 21.73 stone in decimal form.
What is 138 kg in pounds?
138 kg is 304.2 pounds. Multiply 138 by 2.20462 to get 304.24 lbs.
Is 138 kg over 300 pounds?
Yes. 138 kg is 304.2 pounds - 4.2 pounds above the 300 lb mark. 300 pounds is 136.08 kg, which is 1.92 kg below 138 kg.
What is 21 stone 10 pounds in kg?
21 stone 10 pounds is 138.35 kg, which rounds to 138 kg. Convert: (21 x 14) + 10 = 304 pounds. 304 x 0.453592 = 137.89 kg.
Is 138 kg obese?
Yes, at every standard adult height and in every obesity class. At 5ft 6in the BMI is 48.9, Class 3 obese. At 6ft 2in the BMI is 39.0, Class 2 obese. All heights produce a BMI well above the Class 1 obese threshold of 30.
Dr Muhammad Usman
MBBSDr Muhammad Usman graduated with his MBBS from Avicenna International Medical University in Bishkek, Kyrgyzstan (2019–2024) and brings international clinical training across general medicine, surgery, and public health. He writes all health content on this site to current NHS/WHO guidelines, ensuring clinical accuracy and real-world relevance for UK readers.
View LinkedIn Profile