9 Stone to KG
Conversion Result
Exact Conversion
9 stone = 57.15 kg
To convert any other weight from imperial to metric, you can use our primary stone to kg conversion tool for instant results.
9 stone is 57.15 kilograms. Multiply 9 by 6.35029 and you get 57.1526, which rounds to 57.15 kg. This is also 126 pounds. 9 stone is an incredibly common search point for teenagers and adults reaching full height who want to check that their weight is in a healthy range.
At 9 stone, most adults of average UK height will fall within the healthy BMI range. For a woman of average height, 5ft 6in (168cm), 9 stone results in a BMI of 20.2, which is well within the healthy category. For men, who tend to be taller, 9 stone is more likely to be on the borderline of underweight. For example, at the average male height of 5ft 10in, 9 stone gives a BMI of 18.1, which is just below the 18.5 threshold for healthy weight.
Dr Muhammad Usman, MBBS
9 stone is a weight I often see in patients who are naturally slim or have a high metabolic rate. In clinical practice, I find that 9 stone is a “goldilocks” weight for many shorter to average height women—it’s not too heavy and not too light. However, I always emphasize that the number on the scale is only one data point. I’m more interested in whether my patients are getting enough protein, if they have the energy to complete their daily tasks, and if their hormonal health (e.g., regular cycles for women) is stable at this weight.
Is This a Healthy Weight? BMI by Height
| Height | KG | BMI | NHS Category |
|---|---|---|---|
| 5ft 0in (152cm) | 57.2 kg | 24.7 | Healthy Weight |
| 5ft 2in (157cm) | 57.2 kg | 23.2 | Healthy Weight |
| 5ft 4in (163cm) | 57.2 kg | 21.5 | Healthy Weight |
| 5ft 6in (168cm) (UK avg) | 57.2 kg | 20.2 | Healthy Weight |
| 5ft 8in (173cm) | 57.2 kg | 19.1 | Healthy Weight |
| 5ft 10in (178cm) | 57.2 kg | 18.1 | Underweight |
| 6ft 0in (183cm) | 57.2 kg | 17.1 | Underweight |
| 6ft 2in (188cm) | 57.2 kg | 16.2 | Underweight |
Weights Close to 9 Stone
| Stones and Pounds | Kilograms | Total Pounds |
|---|---|---|
| 8 st 8 lb | 54.43 kg | 120 lbs |
| 8 st 10 lb | 55.34 kg | 122 lbs |
| 8 st 12 lb | 56.25 kg | 124 lbs |
| 9 st 0 lb | 57.15 kg | 126 lbs |
| 9 st 2 lb | 58.06 kg | 128 lbs |
| 9 st 4 lb | 58.97 kg | 130 lbs |
| 9 st 6 lb | 59.87 kg | 132 lbs |
| 9 st 8 lb | 60.78 kg | 134 lbs |
| 9 st 10 lb | 61.69 kg | 136 lbs |
| 9 st 12 lb | 62.60 kg | 138 lbs |
For more weight comparisons, see our full stone to kg chart. Need to go the other way? Try our kg to stone converter. You can also check your BMI using our NHS/WHO-aligned BMI calculator.
Related Conversions
Frequently Asked Questions
What is 9 stone in kg?
9 stone is 57.15 kg. The precise calculation is 9 multiplied by 6.35029, giving 57.1526 kg, rounded to 57.15 kg.
What is 9 stone in pounds?
9 stone is exactly 126 pounds. One stone equals 14 pounds, so 9 times 14 equals 126.
Is 9 stone a healthy weight for a 5ft 4in woman?
At 5ft 4in, 9 stone gives a BMI of approximately 21.6, which is well within the NHS healthy range of 18.5 to 24.9. For this height, 9 stone is considered a healthy weight.
Is 9 stone underweight for a man?
For most men of average UK height (5ft 9in or 5ft 10in), yes. At 5ft 10in, 9 stone gives a BMI of 18.1, which is classified as underweight. A man would need to be 5ft 9in or shorter for 9 stone to be in the healthy weight category.
How do I convert 9 stone 6 pounds to kg?
9 stone 6 pounds is 59.87 kg. Total pounds: 9 times 14 plus 6 equals 132 pounds. Then 132 multiplied by 0.453592 equals 59.87 kg.