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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What's 83 Kg in Stones and What's Your BMI?
At 83 kg, your weight converts to 13 stone and 1 pound in UK measurements. However, whether this weight is healthy depends entirely on your height — the same weight can give very different BMI values. To understand what 83 kg means for your health, you need to calculate your personal BMI. Use our free BMI calculator above to find your exact BMI, or read on to see example BMI values at different heights to understand where you might fall on the NHS weight categories.
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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.
BMI at 83 Kg — Examples by Height
At 83 kg, your BMI varies significantly depending on height. Here are BMI examples for common heights:
- 5ft 4in (163 cm): BMI = 31.5 — Obese (Class I) category
- 5ft 6in (168 cm): BMI = 29.4 — Overweight category
- 5ft 8in (173 cm): BMI = 27.8 — Overweight category
- 5ft 10in (178 cm): BMI = 26.2 — Overweight category
- 6ft 0in (183 cm): BMI = 24.8 — Healthy weight category
- 6ft 2in (188 cm): BMI = 23.5 — Healthy weight category
The same weight produces very different health assessments at different heights. At 83 kg, taller adults are more likely to fall within the healthy range, whilst shorter adults may fall into the overweight or obese categories according to NHS guidelines.
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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.
Understanding Your BMI Category and NHS Classifications
NHS BMI categories are: Underweight (below 18.5), Healthy weight (18.5–24.9), Overweight (25.0–29.9), Obese Class I (30.0–34.9), Obese Class II (35.0–39.9), and Severely obese (40.0+). Important note: if you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy weight ranges from 18.5–22.9 and overweight begins at 23.0. Remember that BMI doesn't distinguish between muscle and fat, so athletes may have a high BMI with low body fat. For personalised advice about what your BMI means for your health, speak to your GP who can consider your full health picture.
- 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 83 kg to stones and pounds?
Divide 83 by 6.35029 to get 13.08 stone. This equals 13 stone and 1.2 pounds. Use our weight converter above for instant conversions between kg, stone, and lbs across any weight range.
Is 83 kg a healthy weight for me?
That depends on your height and other health factors. At 83 kg, shorter adults (around 5ft 4in) may be in the obese range, whilst taller adults (6ft+) may be in the healthy range. Calculate your personal BMI using our free tool above to find out where you fall on NHS categories.
What's the healthy weight range at 83 kg?
There is no single "healthy" weight — it depends on your height. At 5ft 8in, a healthy BMI range is roughly 59–79 kg. At 6ft tall, the healthy range is approximately 65–88 kg. Your GP can advise on a healthy target weight for your individual circumstances.
Does BMI at 83 kg account for muscle mass?
No — BMI doesn't distinguish between muscle and fat. If you have significant muscle mass, your BMI may be higher than your actual body fat suggests. Your GP or a healthcare professional can assess your full health picture rather than relying on BMI alone.
What should I do if my BMI at 83 kg puts me in the overweight category?
Speak to your GP about your health. They can discuss lifestyle changes, assess your individual risk factors, and advise on whether any support is needed. Even small reductions in weight (5–10%) can improve health outcomes including blood pressure and blood sugar control.
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.