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 91kg in Stone?
91kg is equivalent to 14 stone and 5.6 pounds. To convert kilograms to stone, you divide the kilogram value by 6.35029. This straightforward metric to imperial weight conversion is useful if you're tracking your health, checking NHS weight ranges, or simply want to understand your weight in UK measurements. Using our free weight converter above, you can instantly switch between kg, stone, and pounds for any weight value.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
91kg to Stone Conversion Table
91kg = 14 stone 5.6lbs (or 201.8 lbs)
Here's a handy reference table showing weights near 91kg in both stone and kilograms:
- 87kg = 13 stone 9.3lbs
- 88kg = 13 stone 11.1lbs
- 89kg = 14 stone 0.9lbs
- 90kg = 14 stone 2.6lbs
- 91kg = 14 stone 5.6lbs
- 92kg = 14 stone 7.4lbs
- 93kg = 14 stone 9.2lbs
- 94kg = 14 stone 10.9lbs
- 95kg = 14 stone 12.7lbs
The stone to kg conversion formula is: weight in kg ÷ 6.35029 = weight in stone. For this kilogram to stone conversion, 91 ÷ 6.35029 = 14.33 stone.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
91kg BMI and Healthy Weight Context
At 91kg, your BMI depends on your height. For example, an adult who is 5ft 8in (173cm) tall with a weight of 91kg would have a BMI of approximately 30.4, which falls into the obese category according to NHS guidelines. However, a taller adult at 5ft 11in (180cm) would have a BMI of around 26.8, which is in the healthy range.
Use our free BMI calculator above to check your personal BMI and healthy weight range based on your actual height. If your BMI is above the healthy range (18.5–24.9), even modest weight loss of 5–10% can bring meaningful health benefits. Your GP can provide personalised guidance on whether your current weight is 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 manually?
Divide 91 by 6.35029. This gives you 14.33 stone. To express this as stone and pounds, multiply the decimal (0.33) by 14 to get 4.6 pounds. So 91kg = 14 stone 5.6lbs. Our weight converter above handles this instantly.
Is 91kg a healthy weight for an adult?
It depends on your height and build. At average UK heights (5ft 6in to 5ft 10in), 91kg typically falls into the overweight or obese BMI category. Check your personal BMI using our free BMI calculator on this page to see if 91kg is healthy for you specifically.
What is 91kg in pounds?
91kg is approximately 201.8 pounds. To convert kg to pounds, multiply by 2.20462. So 91 × 2.20462 = 201.8lbs. You can also use our weight converter above to switch between any metric and imperial measurements.
How much weight loss would I need from 91kg to reach a healthy BMI?
The healthy weight range depends on your height. For someone 5ft 8in tall, a healthy weight is roughly 55–74kg. Weight loss targets should be discussed with your GP. Our GLP-1 weight loss calculator can help project potential weight loss if you're exploring weight management options.
What does 91kg equal in stone and pounds?
91kg equals 14 stone and 5.6 pounds (or 14 stone 5.6lbs). This is the standard UK weight expression. Use our free weight converter to instantly convert between kg, stone, and pounds for any weight value.
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.