Kg to Stones and Pounds Converter
Convert kilograms to stones and pounds, or stones and pounds back to kilograms — instantly, as you type. No sign-up, nothing is sent to a server, and every figure below is calculated from the exact constants.
Try a weight.
Keep pounds under 14 — 14 lb is another stone.
Formula: kg = (stones × 6.35029318) + (pounds × 0.45359237).
The answer in 10 seconds
How to convert kg to stone
Divide kilograms by 6.35029318. The whole number is your stones. Multiply the decimal remainder by 14 to get pounds.
Worked example: 70 ÷ 6.35029318 = 11.02 stone. The whole number is 11 stone, and 0.02 × 14 = 0.3 lb. So 70 kg = 11 stone 0.3 lb.
How to convert stone and pounds to kg
Convert stones and pounds separately, then add them: (stones × 6.35029318) + (pounds × 0.45359237).
Worked example: 12 stone 8 lb = (12 × 6.35029318) + (8 × 0.45359237) = 76.20 + 3.63 = 79.83 kg.
Popular conversions: kg to stones and pounds
Corrected table, 50–120 kg. Calculated at full precision; pounds shown to 1 decimal place. This replaces the faulty 0–40 kg table on the old homepage — it never reached normal adult weights, and its kg rows from 7 kg onward did not match the converter.
| Kilograms | Decimal stone | Stones and pounds |
|---|---|---|
| 50 kg | 7.87 st | 7 st 12.2 lb |
| 55 kg | 8.66 st | 8 st 9.3 lb |
| 60 kg | 9.45 st | 9 st 6.3 lb |
| 65 kg | 10.24 st | 10 st 3.3 lb |
| 70 kg | 11.02 st | 11 st 0.3 lb |
| 75 kg | 11.81 st | 11 st 11.3 lb |
| 80 kg | 12.60 st | 12 st 8.4 lb |
| 85 kg | 13.39 st | 13 st 5.4 lb |
| 90 kg | 14.17 st | 14 st 2.4 lb |
| 95 kg | 14.96 st | 14 st 13.4 lb |
| 100 kg | 15.75 st | 15 st 10.5 lb |
| 105 kg | 16.53 st | 16 st 7.5 lb |
| 110 kg | 17.32 st | 17 st 4.5 lb |
| 115 kg | 18.11 st | 18 st 1.5 lb |
| 120 kg | 18.90 st | 18 st 12.6 lb |
Stone to kg chart (5–20 stone)
| Stone | Kilograms |
|---|---|
| 5 st | 31.75 kg |
| 6 st | 38.10 kg |
| 7 st | 44.45 kg |
| 8 st | 50.80 kg |
| 9 st | 57.15 kg |
| 10 st | 63.50 kg |
| 11 st | 69.85 kg |
| 12 st | 76.20 kg |
| 13 st | 82.55 kg |
| 14 st | 88.90 kg |
| 15 st | 95.25 kg |
| 16 st | 101.60 kg |
| 17 st | 107.95 kg |
| 18 st | 114.31 kg |
| 19 st | 120.66 kg |
| 20 st | 127.01 kg |
Note: 17 stone is 107.95 kg at full precision — the old table showed 107.96 kg.
Mistakes to avoid
The “7 kg per stone” myth: 1 stone is 6.35029318 kg, not 7 kg. That shortcut is almost 10 kg out at 15 stone.
Dividing kg by 14: the 14 belongs to pounds, not kilograms. Convert kg to pounds first, or divide kg by 6.35029318 directly.
Frequently asked questions
How many kg is one stone?
One stone is 6.35029318 kg, which is 14 pounds.
How do I convert kg to stones and pounds?
Divide kg by 6.35029318, take the whole number as stones, and multiply the remainder by 14 for pounds. Example: 70 kg = 11 stone 0.3 lb.
How do I convert stones and pounds to kg?
Multiply stones by 6.35029318, pounds by 0.45359237, and add them. Example: 12 stone 8 lb = 79.83 kg.
What is 80 kg in stones and pounds?
80 kg = 12.60 stone, which is 12 stone 8.4 lb.
What is 100 kg in stones and pounds?
100 kg = 15.75 stone, which is 15 stone 10.5 lb.
Why does the UK use stones?
Stone is the traditional UK and Ireland unit for body weight. Clinics and records usually use kilograms, but most people still describe their own weight in stones and pounds.