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 is 78kg in Stones?
78kg is equal to 12 stone 4.6 pounds (or 12 stone 5lbs when rounded). This conversion uses the standard metric to imperial weight conversion where 1 stone equals 6.35029 kilograms. In the UK, many people still prefer to express their weight in stones and lbs rather than kilograms, even though the NHS uses metric measurements in clinical settings. Understanding your weight in both units can be helpful when using health tools, discussing weight with your GP, or tracking progress on a diet or fitness plan. Use our free weight converter above to instantly switch between kg, stone, and lbs.
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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.
78kg to Stone Conversion Table & Formula
To convert 78kg to stone, divide 78 by 6.35029, which gives 12.29 stone. To break this into stones and pounds, take the decimal (0.29) and multiply by 14 to get the pounds: 0.29 × 14 = 4.1 pounds. So 78kg = 12 stone 4.6lbs.
Here are nearby weights for reference when comparing kilos in stone format:
- 74kg = 11 stone 8.3lbs
- 75kg = 11 stone 11.0lbs
- 76kg = 11 stone 13.7lbs
- 77kg = 12 stone 1.4lbs
- 78kg = 12 stone 4.6lbs
- 79kg = 12 stone 6.3lbs
- 80kg = 12 stone 8.0lbs
- 81kg = 12 stone 9.7lbs
- 82kg = 12 stone 11.4lbs
This table makes it easy to see how weight changes across the kg to stone conversion scale. For quick conversions between other values, use our free weight converter above.
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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.
Is 78kg a Healthy Weight? BMI & Health Context
Whether 78kg is a healthy weight depends on your height. At an average UK male height of 5ft 9in (175cm), a weight of 78kg gives a BMI of 25.4, which falls in the overweight range (BMI 25–29.9) according to NHS guidelines. At an average UK female height of 5ft 3.5in (161cm), 78kg gives a BMI of 30.1, classed as obese. Calculate your personal BMI using our free BMI calculator above to get your exact health context. Even a 5–10% weight reduction can improve blood pressure, blood sugar control, and cholesterol levels. Your GP can advise on what weight range is healthiest for your individual height and health circumstances.
- 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 78kg to stone and pounds?
Divide 78 by 6.35029 to get 12.29 stone. The decimal (0.29) × 14 gives 4.1 pounds. So 78kg = 12 stone 4.6lbs. You can also use our free weight converter on this page for instant conversions.
Is 78kg overweight for an average adult?
It depends on your height. At 5ft 9in (175cm), 78kg gives a BMI of 25.4 (overweight). At 5ft 3.5in (161cm), it gives a BMI of 30.1 (obese). Use our BMI calculator above to find your personal BMI and health category based on your exact height.
What is the formula to convert kilograms to stone?
The formula is: kg ÷ 6.35029 = stone. For example, 78 ÷ 6.35029 = 12.29 stone. To convert the decimal to pounds, multiply the decimal by 14 (since 1 stone = 14 lbs).
How much weight would I need to lose from 78kg to reach a healthy BMI?
This varies by height and current health. At 5ft 9in, a healthy weight is around 55–74kg. At 5ft 3.5in, a healthy weight is around 52–68kg. Your GP can advise on a realistic, sustainable weight loss goal for your individual circumstances. Even losing 5–10% of current weight can improve health markers.
Can I use this conversion for clinical or NHS purposes?
Yes, 78kg = 12 stone 4.6lbs is the standard NHS-recognised conversion. However, medical professionals typically record weight in kilograms. Always confirm your weight with your GP or healthcare provider in whichever unit they prefer for your medical records.
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.