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
Is 77.5 Kg In Stone A Healthy Weight?
77.5 kg converts to 12 stone and 3 pounds in UK measurements. Whether this weight is healthy for you depends entirely on your height and body composition. Someone who is 5ft 10in might have a healthy BMI at this weight, while someone who is 5ft 3in might be overweight. Use our free BMI calculator above to check your personal BMI, and refer to NHS guidelines to understand where your weight falls on the healthy spectrum.
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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.
Healthy Weight Ranges By Height
At 77.5 kg, whether your weight is healthy depends on your height. The NHS defines a healthy BMI as between 18.5 and 24.9 for most UK adults. Here are three concrete examples showing how 77.5 kg converts to stone and where it sits on the health scale:
- 5ft 4in (163 cm): 77.5 kg gives a BMI of 29.3 — this falls into the overweight category. Healthy weight range is 49–66 kg (7st 10lbs to 10st 5lbs).
- 5ft 8in (173 cm): 77.5 kg gives a BMI of 25.9 — this is just above the healthy range. Healthy weight range is 55–75 kg (8st 10lbs to 11st 10lbs).
- 5ft 11in (180 cm): 77.5 kg gives a BMI of 23.4 — this is comfortably within the healthy weight range. Healthy weight range is 60–82 kg (9st 5lbs to 12st 12lbs).
Use our weight converter to check your exact weight in kg, stone, and pounds, then calculate your personal BMI to see where you fit.
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.
NHS Guidance And Next Steps
The NHS recommends a healthy BMI of 18.5 to 24.9 for most adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply — the healthy range is 18.5 to 22.9. Waist measurement also matters: for men, over 94 cm (37 inches) indicates increased health risk, and over 102 cm (40 inches) indicates high risk. For women, these figures are 80 cm (31.5 inches) and 88 cm (34.5 inches). If your weight or waist measurement concerns you, speak to your GP, who can offer personalised guidance based on your overall health picture, family history, and any existing health conditions.
- 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 77.5 kg in stone and pounds?
77.5 kg converts to 12 stone and 3 pounds (12st 3lbs) in UK measurements. To convert kilograms to stone, divide by 6.35. You can also use our free weight converter above to switch between kg, stone, and pounds instantly.
Is 77.5 kg a healthy weight?
It depends on your height. At 5ft 8in, 77.5 kg gives a BMI of 25.9 (slightly overweight). At 5ft 11in, it's healthy (BMI 23.4). Use our BMI calculator to check your personal BMI and see where you fall on NHS guidelines.
What is the healthy weight range for my height?
The healthy BMI range is 18.5 to 24.9. Multiply your height in metres by itself, then divide your weight (kg) by that number. Or use our free BMI calculator above — it calculates your healthy weight range instantly based on your height.
Should I be concerned if I'm above the healthy weight range?
Not necessarily — BMI is a screening tool and has limitations. It doesn't account for muscle mass or where fat is stored. Waist measurement and overall fitness also matter. If you're concerned, speak to your GP for personalised advice.
How can I track my weight loss progress?
Our free progress tracker lets you log your weight and monitor changes over time. Combined with our BMI calculator and weight converter, you can see exactly how your weight in kg, stone, and pounds changes as you work towards your goals. ```
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.