Converting weight from kilograms (kg) to stones and pounds is extremely common in the UK, particularly in healthcare settings where patients and clinicians often use different measurement systems. The kg to stone and pounds NHS conversion format is widely recognised across GP surgeries, hospitals, weight-management services, and personal health tracking tools because it bridges metric accuracy with everyday British understanding.
While kilograms are the UK’s official medical unit, most people still describe body weight in stones and pounds. For this reason, NHS-aligned charts and conversion methods remain essential for clear communication, accurate BMI calculation, and consistent health records. This guide provides a clear NHS-style conversion chart, explains how the NHS uses these measurements, and shows how to convert weight correctly and confidently.
Kg to Stone and Pounds NHS Conversion Chart (Quick Reference)
The table below follows the standard NHS conversion method, using exact values and rounding conventions commonly used in UK healthcare.
| Kilograms (kg) | Stones (st) | Pounds (lb) |
|---|---|---|
| 50 kg | 7 st | 12 lb |
| 55 kg | 8 st | 9 lb |
| 60 kg | 9 st | 6 lb |
| 65 kg | 10 st | 3 lb |
| 70 kg | 11 st | 0 lb |
| 75 kg | 11 st | 11 lb |
| 80 kg | 12 st | 8 lb |
| 85 kg | 13 st | 5 lb |
| 90 kg | 14 st | 2 lb |
| 95 kg | 14 st | 13 lb |
| 100 kg | 15 st | 10 lb |
| 105 kg | 16 st | 7 lb |
| 110 kg | 17 st | 4 lb |
Note:
- 1 stone = 14 pounds
- 1 stone = 6.35 kilograms
- NHS charts typically round pounds to the nearest whole number for readability
This format mirrors how weight is displayed in clinical charts, BMI assessments, and patient-facing NHS materials.
Why the NHS Uses Both Kilograms and Stones
Although the metric system is the official standard for medical records in the UK, the NHS continues to display weight in stones and pounds alongside kilograms. This is done for clarity, inclusivity, and patient understanding.
Many patients:
- Know their weight only in stones and pounds
- Use home scales set to imperial units
- Find stones easier to interpret when tracking progress
By presenting weight in both formats, NHS professionals ensure that patients can understand, discuss, and monitor their health accurately without confusion.
Understanding the Weight Units Used in the UK
Kilograms (kg)
Kilograms are the internationally recognised unit for body weight and are used in:
- Medical records
- BMI calculations
- Growth charts
- Clinical assessments
Stones and Pounds (st & lb)
Stones and pounds are part of the imperial system and remain deeply rooted in UK culture. A weight such as “11 st 4 lb” is immediately meaningful to most people in Britain, even if the clinical record stores the same value in kilograms.
The kg to stone and pounds NHS method ensures consistency between these two systems.
How to Convert Kg to Stone and Pounds (NHS Method)
The NHS conversion method uses a two-step calculation:
- Convert kilograms to stones
Divide the weight in kilograms by 6.35 - Convert the remainder to pounds
Multiply the decimal remainder by 14
Example
Convert 70 kg:
- 70 ÷ 6.35 = 11.02 stones
- 0.02 × 14 = 0.28 pounds
Result:
70 kg = 11 stone 0 pounds (rounded)
This approach is consistent with NHS charts and avoids rounding errors that can affect BMI or long-term tracking.
How the NHS Uses Weight Conversions in Practice
The kg to stone and pounds NHS format is used in many real-world healthcare scenarios, including:
BMI Calculations:Weight may be measured in kilograms but discussed in stones when results are explained to patients.
Pregnancy Weight Monitoring:Midwives often record weight in kilograms while showing progress in stones and pounds for clarity.
Child and Adult Growth Tracking:Parents and patients can easily understand charts when weights are displayed in familiar units.
Weight-Management Programmes:Progress is often discussed in stones lost or gained, even when calculations are metric-based.
Kg to Stone and Pounds NHS Calculators
In addition to charts, many NHS-aligned tools use calculators to convert weight instantly. These calculators follow the same formulas used in clinical charts and are commonly found in:
- NHS online tools
- GP systems
- Health apps
- Fitness trackers configured for UK users
When choosing a calculator, ensure it uses:
- 1 kg = 2.20462 pounds
- 1 stone = 6.35 kilograms
Using approximate values can cause small but cumulative inaccuracies.
Accuracy, Rounding, and Consistency
NHS charts prioritise clarity over excessive decimal precision. While internal systems may store weights to several decimal places, patient-facing charts usually round to the nearest pound.
To track weight accurately:
- Use the same method consistently
- Avoid switching between calculators
- Refer to NHS-style charts where possible
Consistency matters more than tiny numerical differences.
Common Kg to Stone and Pounds NHS Conversions
- 56 kg → 8 st 11 lb
- 62 kg → 9 st 11 lb
- 68 kg → 10 st 10 lb
- 74 kg → 11 st 9 lb
- 82 kg → 12 st 13 lb
- 98 kg → 15 st 6 lb
These values match NHS-standard rounding conventions.
Conclusion
The kg to stone and pounds NHS system exists to ensure clarity, accuracy, and accessibility in UK healthcare. By combining precise metric measurement with familiar imperial units, the NHS makes weight information easier to understand and more meaningful for patients.
Whether you’re checking your BMI, tracking weight during pregnancy, or reviewing health records, using an NHS-aligned conversion chart ensures your numbers are accurate, consistent, and easy to interpret. With the chart and guidance above, you can convert weight confidently and stay aligned with UK healthcare standards.
Frequently Asked Question
What is 56 kg in stone and pounds NHS format?
56 kg is approximately 8 stone 11 pounds using NHS conversion standards.
Does the NHS officially use stones?
Medical records are stored in kilograms, but stones and pounds are commonly used alongside kg for patient communication.
Are NHS weight charts available to download?
Yes, many NHS services provide printable or digital conversion charts for clinical and public use.
Is the conversion method the same for adults and children?
Yes. The formula is the same, though children’s assessments also use age-specific growth percentiles.
Why not just use kilograms only?
Because many patients understand stones better, using both units improves communication and reduces misunderstanding.
You may also read: BMI Chart: What’s a Healthy Weight Range for Your Height and Age?
