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 84 kg in Stones and Pounds?
84 kilograms is equal to 13 stone and 3.2 pounds (or 13st 3lbs in traditional UK measurements). This conversion uses the standard metric-to-imperial formula: divide kilograms by 6.35029 to get stones. Whether you're checking your weight, comparing health data, or following NHS guidance, understanding your weight across different measurements is helpful. Our free weight converter above makes it easy to switch between kg, stone, and pounds instantly.
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.
84 kg in Context — UK Health Guidance
At 84 kg, your weight sits in the overweight to obese range for most UK adults according to NHS guidelines, depending on your height. To understand what this means for your health, use our free BMI calculator above — enter your height and weight to see your personal BMI. According to NHS guidance, a healthy BMI is between 18.5 and 24.9. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds (18.5 to 22.9), as these groups face higher health risks at the same BMI. At 84 kg, if you're 173 cm (5ft 8in) tall, your BMI would be approximately 28.1, which falls in the overweight category. If you're taller or shorter, this changes — which is why calculating your personal BMI is important for understanding your individual health context.
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.
Health Resources and Next Steps in the UK
If you're concerned about your weight, the NHS offers free support through your GP and community weight management programmes. Your GP can refer you to Tier 1 or Tier 2 services including the free NHS Weight Loss Plan, digital tools, and behaviour change support. For more specialist guidance, ask your GP about Tier 3 specialist weight management services available in your area. Track your progress using our free progress tracker on this page. Remember, sustainable weight loss of 0.5–1 kg per week is recommended by the NHS alongside a balanced diet and increased physical activity. Small changes add up — even a 5% reduction in body weight can bring meaningful health benefits.
- 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 84 kg to stones and pounds?
Divide 84 by 6.35029 to get stones: 84 ÷ 6.35029 = 13.24 stone. This equals 13 stone and 3.2 pounds. Our weight converter above does this instantly for any value. You can also use the formula: multiply the decimal part (0.24) by 14 to get pounds (0.24 × 14 = 3.2lbs).
Is 84 kg a healthy weight for me?
This depends on your height. Calculate your BMI using the free tool on this page — enter 84 kg and your height to see your personal BMI. According to NHS guidelines, a healthy BMI is 18.5–24.9. If your BMI falls outside this range, your GP can discuss weight management options with you, including lifestyle changes or specialist referral.
What's the average UK adult weight?
According to the Office for National Statistics (ONS), the average UK adult man weighs approximately 85.7 kg (13st 7lbs) and the average UK adult woman weighs approximately 71.6 kg (11st 3lbs). At 84 kg, you're close to the average adult male weight, though weight recommendations are individual based on height, age, and health.
How can I lose weight safely in the UK?
The NHS recommends losing 0.5–1 kg per week through a balanced diet with a moderate calorie deficit (around 500 kcal per day) and regular physical activity. Your GP can refer you to free NHS weight management programmes, the NHS Weight Loss Plan, or specialist services depending on your circumstances and health needs.
What if I'm 84 kg and undergoing weight management?
Use our free progress tracker on this page to log your weight changes over time. Track both kg and stone measurements to see your progress clearly. Remember that weight naturally fluctuates day-to-day, so focus on weekly or monthly trends. If you're taking any weight loss medications, your prescriber will guide your progress expectations — individual results vary significantly.
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.