The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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71kg in Stones and Pounds — Is It a Healthy Weight?
71kg converts to 11 stone 2 pounds (or 156.5 lbs). Whether this weight is healthy entirely depends on your height — a weight considered overweight for someone 5ft 3in may be perfectly healthy for someone 5ft 10in. Using NHS guidelines and our free BMI calculator, you can determine if 71kg falls within a healthy weight range for your individual height. This guide explains how to assess whether your weight is healthy and what the numbers mean in UK measurements.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Healthy Weight Ranges at Different Heights
To understand if 71kg is healthy for you, compare it against the healthy weight range for your specific height. The NHS recommends a healthy BMI of 18.5 to 24.9 for most UK adults, with lower thresholds for people of South Asian, Chinese, Black African, or Black Caribbean heritage.
Here are three concrete examples showing how 71kg sits at different heights:
- At 5ft 3in (160cm): 71kg gives a BMI of 28.2 — this is in the overweight range. Healthy weight would be 47–64kg (7st 5lbs to 10st 1lbs).
- At 5ft 7in (170cm): 71kg gives a BMI of 24.9 — this is at the upper limit of healthy weight. Healthy range would be 53–76kg (8st 5lbs to 12st).
- At 5ft 10in (178cm): 71kg gives a BMI of 22.4 — this is comfortably within the healthy range. Healthy range would be 59–87kg (9st 4lbs to 13st 9lbs).
Use our free BMI calculator above to check your personal BMI instantly and see exactly where you fall on the NHS scale.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS Guidance and Next Steps
Beyond BMI, the NHS also recommends measuring your waist circumference as an indicator of health risk. A waist measurement of over 94cm (37 inches) for men or over 80cm (31.5 inches) for women suggests increased health risk, regardless of BMI.
If your weight falls outside the healthy range for your height, small changes can make a real difference. The NHS recommends losing weight at a rate of 0.5 to 1kg per week for sustainable results. This typically requires a calorie deficit of around 500 calories per day, achieved through dietary changes and increased physical activity.
Your GP can provide personalised guidance about whether your weight poses any health risks and discuss the most effective approach for you. Remember that weight is just one aspect of overall health.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
What is 71kg in stones and pounds?
71kg equals 11 stone 2 pounds (11st 2lbs) or 156.5 pounds. To convert kilograms to stone, divide the weight by 6.35. Use our free weight converter above to instantly switch between metric and imperial measurements.
Is 71kg a healthy weight?
It depends entirely on your height. At 5ft 7in, 71kg is healthy (BMI 24.9). At 5ft 3in, it's overweight (BMI 28.2). At 5ft 10in, it's comfortably healthy (BMI 22.4). Use the BMI calculator on this page to check your personal result based on your height.
What is the healthy weight range at my height?
The NHS healthy weight range is a BMI of 18.5 to 24.9. For example, at 5ft 7in, the healthy range is 53–76kg (8st 5lbs to 12st). For South Asian or other higher-risk ethnic groups, the range is slightly lower. Your GP can advise on your specific healthy range.
How can I tell if my weight is affecting my health?
Beyond BMI, measure your waist circumference. The NHS flags increased risk above 94cm (37in) for men or 80cm (31.5in) for women. Discuss any concerns with your GP, who can assess your individual health risk based on your weight, fitness, medical history, and lifestyle.
How quickly should I lose weight if I'm overweight?
The NHS recommends a safe, sustainable rate of 0.5 to 1kg (1 to 2 lbs) per week. This usually requires a calorie deficit of around 500 calories per day through diet and physical activity. Faster weight loss is possible with professional support but may increase muscle loss.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.