Stone to KG Converter - UK Weight Calculator
Free stone to kg converter for UK users. Instantly convert between stone, kilograms, and pounds. Perfect for checking weight on scales, medical records, or fitness tracking. Includes NHS healthy weight guidance and comprehensive conversion tables.
Stone & Pounds to Kilograms
Kilograms to Stone & Pounds
Stone to KG Conversion Formulas
The exact conversion factors used by this calculator:
1 stone = 14 pounds (lbs)
1 kg = 0.157473 stone = 2.20462 lbs
1 lb = 0.453592 kg
Stone → Kilograms
Formula: kg = stone × 6.35029318
Example: 12 stone = 12 × 6.35 = 76.20 kg
Quick method: Multiply stone by 6.35
Kilograms → Stone
Formula: stone = kg ÷ 6.35029318
Example: 80 kg = 80 ÷ 6.35 = 12.60 st
Quick method: Divide kg by 6.35
Stone to KG Quick Reference Table
| Stone | Kilograms | Pounds | Notes |
|---|---|---|---|
| 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 | Common milestone |
| 11 stone | 69.85 kg | 154 lbs | - |
| 12 stone | 76.20 kg | 168 lbs | Common milestone |
| 13 stone | 82.55 kg | 182 lbs | - |
| 14 stone | 88.90 kg | 196 lbs | - |
| 15 stone | 95.25 kg | 210 lbs | Common milestone |
| 16 stone | 101.60 kg | 224 lbs | - |
| 17 stone | 107.95 kg | 238 lbs | - |
| 18 stone | 114.30 kg | 252 lbs | - |
| 19 stone | 120.66 kg | 266 lbs | - |
| 20 stone | 127.01 kg | 280 lbs | Common milestone |
KG to Stone Quick Reference Table
| Kilograms | Stone & Pounds | Stone (decimal) | Total Pounds |
|---|---|---|---|
| 50 kg | 7 st 12 lbs | 7.87 st | 110.2 lbs |
| 55 kg | 8 st 9 lbs | 8.66 st | 121.3 lbs |
| 60 kg | 9 st 6.5 lbs | 9.45 st | 132.3 lbs |
| 65 kg | 10 st 3.5 lbs | 10.24 st | 143.3 lbs |
| 70 kg | 11 st 0 lbs | 11.02 st | 154.3 lbs |
| 75 kg | 11 st 11.5 lbs | 11.81 st | 165.3 lbs |
| 80 kg | 12 st 8.4 lbs | 12.60 st | 176.4 lbs |
| 85 kg | 13 st 5.3 lbs | 13.39 st | 187.4 lbs |
| 90 kg | 14 st 2.5 lbs | 14.17 st | 198.4 lbs |
| 95 kg | 14 st 13.4 lbs | 14.96 st | 209.4 lbs |
| 100 kg | 15 st 10.3 lbs | 15.75 st | 220.5 lbs |
| 110 kg | 17 st 4.9 lbs | 17.32 st | 242.5 lbs |
| 120 kg | 18 st 13.5 lbs | 18.90 st | 264.6 lbs |
| 130 kg | 20 st 7 lbs | 20.47 st | 286.6 lbs |
NHS Healthy Weight Guide
The NHS uses Body Mass Index (BMI) to determine healthy weight ranges. Here's a guide to BMI categories:
BMI below 18.5
BMI 18.5 to 24.9
BMI 25 to 29.9
BMI 30 or above
Healthy Weight Ranges by Height
| Height | Healthy Weight Range (Stone) | Healthy Weight Range (KG) |
|---|---|---|
| 5'0" (152cm) | 6st 10lb - 9st 0lb | 42.6 - 57.2 kg |
| 5'2" (157cm) | 7st 2lb - 9st 8lb | 45.4 - 60.8 kg |
| 5'4" (163cm) | 7st 9lb - 10st 3lb | 48.5 - 65.0 kg |
| 5'6" (168cm) | 8st 2lb - 10st 12lb | 51.8 - 69.4 kg |
| 5'8" (173cm) | 8st 9lb - 11st 6lb | 54.9 - 72.6 kg |
| 5'10" (178cm) | 9st 4lb - 12st 7lb | 59.2 - 79.4 kg |
| 6'0" (183cm) | 9st 13lb - 13st 4lb | 63.1 - 84.4 kg |
| 6'2" (188cm) | 10st 8lb - 14st 2lb | 67.1 - 89.8 kg |
| 6'4" (193cm) | 11st 4lb - 15st 0lb | 71.5 - 95.3 kg |
UK Stone vs US Pounds
The UK and US use different weight systems, which can cause confusion:
United Kingdom
- Uses stone and pounds for body weight
- Example: "I weigh 11 stone 7 lbs"
- 1 stone = 14 pounds
- Medical records often use kg
- Bathroom scales show st/lbs or kg
United States
- Uses pounds only for body weight
- Example: "I weigh 161 pounds"
- Stone not commonly used
- Medical records use lbs or kg
- Bathroom scales show lbs only
11 st 7 lbs (UK) = 161 lbs (US) = 73.03 kg (Metric)
10 stone (UK) = 140 lbs (US) = 63.50 kg (Metric)
15 stone (UK) = 210 lbs (US) = 95.25 kg (Metric)
Weight Conversion Tips
Quick Mental Maths
- Stone to kg: Multiply by 6.35 (or 6.5 for rough estimate)
- KG to stone: Divide by 6.35 (or divide by 6.5)
- Stone to lbs: Multiply by 14
- 10 stone ≈ 63-64 kg (good reference point)
- 1 stone ≈ 6.35 kg ≈ 14 lbs
Weighing Yourself
- Weigh yourself at the same time each day
- Morning after bathroom, before eating is most consistent
- Weight can fluctuate 1-2 kg (2-4 lbs) daily
- Track weekly averages, not daily changes
- Same scales, same location for accuracy
App Settings
- Most fitness apps allow unit preferences
- Apple Health: Settings → Health → Units
- Fitbit: Profile → Settings → Units
- MyFitnessPal: More → Settings → Units
- Choose your preferred unit for consistency
Popular Stone to KG Searches
Quick answers to the most common stone to kg conversions:
63.50 kg
69.85 kg
76.20 kg
82.55 kg
88.90 kg
95.25 kg
11 st 0 lbs
11 st 11.5 lbs
12 st 8.4 lbs
13 st 5.3 lbs
14 st 2.5 lbs
15 st 10.3 lbs
Frequently Asked Questions
Official UK Health Resources
Trusted sources for weight and health guidance in the UK:
NHS BMI Calculator
Official NHS healthy weight calculator. Check your BMI and get personalised advice for your height and weight.
Visit NHS BMI Tool →NHS Weight Loss Guide
Free NHS 12-week weight loss plan with diet tips, exercise advice, and weekly goals for sustainable weight loss.
Visit NHS Weight Loss →Public Health England
Government health statistics and guidelines on healthy weight ranges for the UK population.
Visit PHE →British Dietetic Association
Professional body for dietitians. Reliable nutrition and weight management resources for the UK.
Visit BDA →Sport England
Physical activity guidelines and resources to help maintain a healthy weight through exercise.
Visit Sport England →NHS Weight Loss App
Free NHS mobile app for tracking weight, setting goals, and accessing healthy recipes.
Get NHS App →About This Stone to KG Converter
This free stone to kg converter is designed specifically for UK users who need to convert between the traditional British stone measurement and metric kilograms. Whether you're tracking your weight, understanding medical records, or comparing fitness goals, this converter provides instant, accurate results.
The converter uses the exact conversion factor (1 stone = 6.35029318 kg) for precision, while displaying results in practical formats including stone and pounds, decimal stone, and kilograms. We've also included comprehensive reference tables for quick lookups and NHS healthy weight guidance.
Disclaimer: This converter is for informational purposes only. For medical advice about your weight, please consult your GP or a qualified healthcare professional. The healthy weight ranges provided are general guidelines based on BMI and may not apply to everyone (e.g., athletes, pregnant women, elderly individuals).
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Pro Tips for Accurate Results
- Double-check your input values before calculating
- Use the correct unit format (metric or imperial)
- For complex calculations, break them into smaller steps
- Bookmark this page for quick future access
Understanding Your Results
Our Stone To Kg provides:
- Instant calculations - Results appear immediately
- Accurate formulas - Based on official UK standards
- Clear explanations - Understand how results are derived
- 2025/26 updated - Using current rates and regulations
Common Questions
Is this calculator free?
Yes, all our calculators are 100% free to use with no registration required.
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Our calculators use verified formulas and are regularly updated for accuracy.
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