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 77.5kg a Healthy Weight in Stones?
77.5kg converts to 12 stone 2.2 pounds (or approximately 12 stone 2 lbs). Whether this weight is healthy depends entirely on your height. For some adults, 77.5kg falls within a healthy range; for others, it may indicate overweight or obesity according to NHS guidelines. Use our free BMI calculator above to find out your personal BMI — this will instantly show you whether 77.5kg is healthy for your specific height and give you clear NHS categories.
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.
Healthy Weight Ranges by Height at 77.5kg
At 77.5kg, your weight health depends on your height. Here's how this weight converts and where it sits against NHS healthy weight thresholds for different heights:
- 5ft 2in (157cm): BMI of 31.4 — this falls in the obese range. Healthy weight range: 49–62kg (7st 9lbs–9st 11lbs).
- 5ft 6in (168cm): BMI of 27.4 — this is in the overweight range. Healthy weight range: 56–75kg (8st 11lbs–11st 11lbs).
- 5ft 10in (178cm): BMI of 24.5 — this is at the top of the healthy weight range. Healthy weight range: 59–79kg (9st 4lbs–12st 6lbs).
To get your exact BMI classification, convert kilograms to stone using the weight converter on this page alongside your height measurement.
Clinically BackedWeight Loss
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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.
NHS Guidance and What to Do Next
The NHS recommends a healthy BMI between 18.5 and 24.9 for most adults, though lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage. If your BMI at 77.5kg is outside the healthy range, your waist measurement also matters — the NHS suggests over 94cm (37 inches) for men and over 80cm (31.5 inches) for women indicates increased health risk. If you're concerned, speak to your GP who can assess your individual health picture and discuss support options including lifestyle changes or referral to specialist weight management services.
- 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 77.5kg to stones and pounds?
77.5kg equals 12 stone 2.2 pounds (approximately 12st 2lbs). To convert, divide 77.5 by 6.35 to get stone, then multiply the decimal by 14 to get pounds. Our weight converter above makes this calculation instant.
Is 77.5kg overweight for a 5ft 6in woman?
At 77.5kg and 5ft 6in, your BMI is 27.4, which falls in the overweight category. For this height, the NHS healthy weight range is 56–75kg (8st 11lbs–11st 11lbs). Your GP can discuss whether weight management is appropriate for your individual health.
What's the healthy weight range for someone 5ft 10in tall?
For 5ft 10in (178cm), the healthy weight range is approximately 59–79kg (9st 4lbs–12st 6lbs). At 77.5kg, this falls within the healthy range for this height. Calculate your personal BMI using our free tool to confirm.
Can I use waist measurement alongside weight to assess health?
Yes. NHS guidance recommends checking both BMI and waist circumference. For men, over 94cm indicates increased risk; over 102cm indicates high risk. For women, over 80cm indicates increased risk; over 88cm indicates high risk. Speak to your GP for personalised assessment.
What should I do if 77.5kg is outside my healthy weight range?
If you're concerned about your weight, your GP can offer support including advice on healthy eating, physical activity, or referral to specialist tier 3 weight management services. Sustainable weight loss is typically 0.5–1kg per week. Your GP can discuss the best approach for you.
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.