Stone to KG Calculator — Convert Stone & Pounds to Kilograms
Convert your weight from stone and pounds to kilograms instantly. Whether you’re tracking your weight loss progress, understanding a medical measurement, or comparing weights internationally — just enter your stone and pounds and get the exact result in kg, total pounds and grams. Free, no sign-up required.
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How to Convert Stone to KG
To convert stone to kilograms, multiply the number of stone by 6.35029. If you have additional pounds, multiply those by 0.453592 and add both results together.
Formula: KG = (Stone × 6.35029) + (Pounds × 0.453592)
Example: 11 stone 7 pounds = (11 × 6.35029) + (7 × 0.453592) = 69.85 + 3.18 = 73.03 kg
| Stone | Kilograms (kg) | Pounds (lbs) |
|---|---|---|
| 7 stone | 44.45 kg | 98 lbs |
| 8 stone | 50.80 kg | 112 lbs |
| 9 stone | 57.15 kg | 126 lbs |
| 10 stone | 63.50 kg | 140 lbs |
| 11 stone | 69.85 kg | 154 lbs |
| 12 stone | 76.20 kg | 168 lbs |
| 13 stone | 82.55 kg | 182 lbs |
| 14 stone | 88.90 kg | 196 lbs |
| 15 stone | 95.25 kg | 210 lbs |
| 16 stone | 101.60 kg | 224 lbs |
Why Does the UK Use Stone?
The stone is a unit of weight used almost exclusively in the United Kingdom and Ireland. Most other countries use kilograms exclusively, which is why conversion is often needed for medical forms, international travel, and fitness tracking apps. One stone equals 14 pounds or approximately 6.35 kilograms. The stone has been used in Britain since the medieval period and remains deeply embedded in everyday conversation about body weight.
Stone vs KG — Which Should You Use?
In the UK, most people still describe their body weight in stone and pounds in everyday conversation, while medical professionals increasingly use kilograms. Gym equipment, fitness apps and international health tools typically use kilograms, so knowing your weight in both units is genuinely useful. If your BMI is calculated by a doctor it will use kilograms — use this calculator to quickly convert before your appointment.
FAQs
How many kg is 1 stone?
1 stone is equal to 6.35029 kilograms, or approximately 6.35 kg.
How many kg is 10 stone?
10 stone is equal to 63.50 kilograms.
How many kg is 11 stone?
11 stone is equal to 69.85 kilograms.
How many kg is 12 stone?
12 stone is equal to 76.20 kilograms.
How many kg is 13 stone?
13 stone is equal to 82.55 kilograms.
How many kg is 14 stone?
14 stone is equal to 88.90 kilograms.
How many pounds are in a stone?
There are 14 pounds in 1 stone. So 11 stone = 154 pounds, 12 stone = 168 pounds and so on.
Do other countries use stone?
Stone is used almost exclusively in the United Kingdom and Ireland. The United States uses pounds, while most of the rest of the world uses kilograms.
Is this calculator free?
Yes completely free with no sign-up needed.