5.5 Stone to KG
5.5 stone = 34.93 kg | 5 stone 7 pounds | 77 lbs exactly
Convert your weight
Medically ReviewedRounded to 2 decimal places. Standard UK/IE ratio (1 st = 6.35029 kg).
5.5 stone is 34.93 kilograms. Multiply 5.5 by 6.35029 to get 34.927 kg, rounded to 34.93 kg. Since one stone is 14 pounds, 5.5 stone is exactly 77 pounds, which most people write as 5 stone 7 pounds.
Half stones are the conversions I trust most, because the maths can hardly go wrong: every half-stone is a whole number of pounds, and here it is a tidy 77 lb. In my experience, 5.5 stone turns up when someone reads "5 st 7" off an analogue bathroom scale or an old record and needs it in kilos, and the figure they actually want is the 34.93 kg for the chart they are comparing against. Run the numbers either direction and they land in the same place, which is how you know a conversion is sound.
5.5 stone = 77 lb, exactly 5 stone 7 pounds
Five whole stones is 70 lb, and the half adds a clean 7 lb on top, so 5.5 stone is 77 lb with no rounding involved. In kilograms that is 34.93 kg. All three expressions describe the identical weight, and the pound figure is the one I use as a sanity check because it cannot drift.
A note on child weight
5.5 stone (34.93 kg) mostly comes up for children, and this conversion alone cannot say what it means. A child's weight only makes sense alongside age, sex, height and the way their measurements move over time on the right growth chart, so read the chart, not the number. For adult weight and BMI reference, see the How Much Should I Weigh page and our BMI Calculator.
Half-Stone Weights Near 5.5 Stone
Every half-stone converts to a whole number of pounds because 0.5 x 14 = 7 with no remainder.
| Stone | Kilograms | Pounds | Decimal Stone |
|---|---|---|---|
| 4.5 stone | 28.58 kg | 63 lbs | 4.50 st |
| 5 stone | 31.75 kg | 70 lbs | 5.00 st |
| 5.5 stone (this page) | 34.93 kg | 77 lbs | 5.50 st |
| 6 stone | 38.10 kg | 84 lbs | 6.00 st |
| 6.5 stone | 41.28 kg | 91 lbs | 6.50 st |
| 7.5 stone | 47.63 kg | 105 lbs | 7.50 st |
| 8.5 stone | 53.98 kg | 119 lbs | 8.50 st |
Frequently Asked Questions
What is 5.5 stone in kg?
5.5 stone is 34.93 kg. Multiply 5.5 by 6.35029 to get 34.927 kg, which rounds to 34.93 kg. In plain language, that is 5 stone 7 pounds.
How many pounds is 5.5 stone?
5.5 stone is exactly 77 pounds. Work it as 5 x 14 = 70, plus 7 for the half stone, which gives 77 lb with nothing left over.
What is 5 stone 7 pounds in kilograms?
5 stone 7 pounds is 34.93 kg, because 5 stone 7 pounds is the same as 5.5 stone. You can cross-check through pounds: 77 x 0.453592 = 34.927 kg.
Is 5.5 stone a healthy weight for a child?
No single figure can say. Children's weight is read against age, sex, height and the way measurements track over time on the proper growth chart. The pattern on the chart is what counts, not the raw number.
Why do half-stone values always give whole pounds?
Because one stone is 14 lb, half a stone is always exactly 7 lb. So 5.5 stone is 5 x 14 plus 7, which is 77 lb. No fraction of a pound can ever appear.
Dr Muhammad Usman
Dr Muhammad Usman graduated with his MBBS from Avicenna International Medical University in Bishkek, Kyrgyzstan (2019–2024).
He brings clinical training across general medicine, surgery, and public health, and writes the site's health information for UK readers in clear, practical language.