Instant Stone Conversion Tool
Enter your weight in stones and (optionally) extra pounds to convert it to kilograms and total pounds.
How to use this stones to kilos and pounds calculator
This converter is designed to be simple and fast. If you already know your weight in stone format, you can get accurate metric and imperial equivalents in one click.
- Type your value in the Stones field.
- Optionally add any extra pounds in the second field.
- Click Calculate to view total pounds and kilograms instantly.
- Use Clear to reset and start a new conversion.
Understanding stones, pounds, and kilograms
The stone (st) is a UK-based unit often used for body weight. One stone is always equal to 14 pounds (lb). In most countries, body weight is measured in kilograms (kg), which is part of the metric system.
This means you can switch between these units easily once you know the fixed relationships:
- 1 stone = 14 pounds
- 1 pound = 0.45359237 kilograms
- 1 stone = 6.35029318 kilograms
Conversion formulas
Stones to pounds
Pounds = Stones × 14
Stones to kilograms
Kilograms = Stones × 6.35029318
Stones + pounds to kilograms
If you have both units (for example, 10 st 7 lb), first convert everything to pounds, then convert to kilograms:
Total pounds = (Stones × 14) + Extra pounds
Kilograms = Total pounds × 0.45359237
Quick conversion chart
| Stones | Pounds | Kilograms |
|---|---|---|
| 7 st | 98 lb | 44.45 kg |
| 9 st | 126 lb | 57.15 kg |
| 11 st | 154 lb | 69.85 kg |
| 13 st | 182 lb | 82.55 kg |
| 15 st | 210 lb | 95.25 kg |
Why people still use stones
In the UK and Ireland, many people still describe body weight in stones and pounds because it feels familiar and intuitive. Medical records, fitness apps, and international forms, however, often require kilograms. That is why a reliable stone to kg converter is helpful for everyday tasks, including:
- Tracking weight loss goals
- Filling in health forms
- Comparing gym and nutrition plans
- Sharing progress with international coaches or doctors
Frequently asked questions
Is 1 stone always 14 pounds?
Yes. The stone is a fixed unit in the imperial system, and 1 stone always equals exactly 14 pounds.
Can I enter decimal stones?
Absolutely. For example, 10.5 stones is valid and represents 10 stones and 7 pounds.
How accurate is this calculator?
The calculator uses the exact conversion factor of 0.45359237 kilograms per pound and shows values rounded for readability. It is suitable for health, fitness, and everyday use.
Can I use this for body weight only?
While commonly used for body weight, the conversion itself works for any value measured in stones.
Final takeaway
If you need a quick, accurate stone conversion, this stones to kilos and pounds calculator gives you instant results with minimal input. Save this page and use it whenever you need to convert stone to kg, stone to lb, or mixed stone-and-pound values.