Convert Kilograms to Stone and Pounds
Use this quick tool to convert your weight from kilograms (kg) into UK stone and pounds (st/lb), commonly used in NHS forms and appointments.
What this NHS-style converter does
In the UK, body weight is often discussed in stone and pounds, while many scales and apps record weight in kilograms. This calculator bridges both systems instantly, making it easier to:
- prepare for GP or NHS clinic discussions,
- understand letters or historical records that use stone,
- track progress if your fitness app is set to kilograms.
How the conversion works
The conversion follows standard measurement rules:
- 1 kilogram = 2.2046226218 pounds
- 1 stone = 14 pounds
So the calculator first converts kilograms to total pounds, then splits that number into full stones plus the remaining pounds.
Example
If your weight is 70 kg:
70 × 2.2046226218 = 154.32 lb total
154.32 lb = 11 stone 0.3 lb (approximately)
Quick reference chart (kg to st/lb)
| Kilograms (kg) | Stone and pounds (st/lb) |
|---|---|
| 50 kg | 7 st 12.2 lb |
| 60 kg | 9 st 6.3 lb |
| 70 kg | 11 st 0.3 lb |
| 80 kg | 12 st 8.4 lb |
| 90 kg | 14 st 2.4 lb |
| 100 kg | 15 st 10.5 lb |
When this helps most
Many people switch between units without realizing it. You might weigh yourself in kg at home, then hear stone and pounds during an appointment. A fast converter avoids confusion and helps you keep a single consistent record.
Practical tracking tips
- Record date + weight in one preferred unit every week.
- If needed, store both (kg and st/lb) in the same note.
- Look at trends over time instead of day-to-day fluctuations.
- Use the same scale and same time of day for better consistency.
FAQ
Is this calculator accurate for NHS use?
Yes. It uses the standard metric/imperial conversion factors. In clinical settings, staff may round slightly depending on context, but the base conversion is correct.
Should I use decimal pounds or whole pounds?
For personal tracking, decimal pounds are useful. In conversation, many people round to the nearest whole pound. This tool shows both formats for convenience.
Can I use this for children or adults?
The unit conversion itself is universal. However, weight interpretation (for example, healthy ranges) differs by age, sex, and clinical context. For medical advice, follow NHS guidance and consult a professional.