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
Free tracker included with every download this week
What Is 91 Kg In Stone And Lbs?
91 kilograms is equal to 14 stone and 5.3 pounds. This conversion uses the standard metric-to-imperial formulas: divide kilograms by 6.35029 to get stone, or multiply by 2.20462 to get pounds. Understanding your weight in both metric and imperial units is useful for health checks, fitness tracking, and NHS appointments. Use our free weight converter above to switch between kg, stone, and pounds instantly, or follow the conversion formula and nearby values table below.
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Calculate Your BMI Instantly
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.
91 Kg To Stone Conversion Formula And Reference Table
To convert 91kg to stone and pounds, use this formula: divide 91 by 6.35029 to get 14.33 stone. Then multiply the decimal (0.33) by 14 to get the remaining pounds: approximately 14 stone 5.3 lbs. This works because 1 stone equals exactly 6.35029 kilograms.
Here are nearby weights for reference:
- 85 kg = 13 stone 5.3 lbs
- 87 kg = 13 stone 9.2 lbs
- 89 kg = 14 stone 0.2 lbs
- 91 kg = 14 stone 5.3 lbs
- 93 kg = 14 stone 9.2 lbs
- 95 kg = 14 stone 13.1 lbs
- 97 kg = 15 stone 3.0 lbs
For quick reference, remember that 1 kilogram equals approximately 2.2 pounds, and the standard kilogram to stone conversion divides your weight by 6.35.
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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.
Is 91 Kg A Healthy Weight? BMI Context For UK Adults
Whether 91kg is a healthy weight depends on your height and age. At average UK male height (175cm), 91kg gives a BMI of 29.7 — just below the "overweight" threshold of 30. At average UK female height (162cm), the same weight produces a BMI of 34.6 — in the "obese" category. According to NHS guidelines, a healthy weight range is BMI 18.5–24.9. Use our free BMI calculator above to check your personal BMI and healthy weight range based on your exact height. Remember that BMI is a screening tool and doesn't account for muscle mass; your GP can provide personalised guidance about what's healthy for you.
- 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.
How do I convert 91kg to stone in my head?
Divide 91 by 6.35 — this gives approximately 14.3 stone. To convert the decimal to pounds, multiply 0.3 by 14 (roughly 4 pounds). So 91kg ≈ 14 stone 4–5 lbs. For exact conversions, use our weight converter tool above.
What is 91 kg in pounds only?
91 kilograms equals approximately 200.5 pounds. To calculate this, multiply 91 by 2.20462 (the kg-to-lbs conversion factor). This is useful when you see weight listed in pounds on fitness equipment or international health resources.
Is 91 kg overweight in the UK?
It depends on your height. At 175cm (average UK male height), 91kg gives a BMI of 29.7 — borderline overweight. At 162cm (average UK female height), it's a BMI of 34.6 — obese category. NHS defines healthy BMI as 18.5–24.9, overweight as 25–29.9, and obese as 30+. Check your personal BMI using our calculator.
What's the healthy weight range for someone who weighs 91 kg?
A healthy weight range depends on your height. At 175cm, healthy weight is 56–75kg. At 162cm, it's 49–65kg. These ranges assume a healthy BMI of 18.5–24.9. Your GP can advise on realistic and sustainable targets based on your overall health, not weight alone.
How quickly should I aim to lose weight if I'm 91 kg?
The NHS recommends losing 0.5–1kg per week for sustainable, healthy weight loss. This typically requires a calorie deficit of around 500 calories per day. gradual weight management can lead to muscle loss and isn't sustainable long-term. Your GP or a registered dietitian can help create a personalised plan suited to your health needs.
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.