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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120kg Man — What Does It Mean for Your Health?
If you weigh 120kg, your health context depends on your height, age, and overall fitness. At 120kg, most adult men fall into the overweight or obese category according to NHS guidelines — though the exact BMI classification varies significantly. This guide explains what 120kg means for your health, how to calculate your personal BMI, and what NHS-recommended options are available if you're considering weight management. You can check your individual BMI instantly using our free BMI calculator above to see where you stand.
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.
BMI and Health Context for 120kg
120kg in imperial measurements is approximately 18 stone 13 pounds (or 264.6 lbs). To find your personal BMI, you need your height — BMI is calculated by dividing your weight in kilograms by your height in metres squared. For example, a man who is 180cm (5ft 11in) tall and weighs 120kg would have a BMI of 37, which falls into the obese (Class II) category according to NHS guidelines.
- Healthy weight BMI: 18.5–24.9
- Overweight BMI: 25.0–29.9
- Obese (Class I) BMI: 30.0–34.9
- Obese (Class II) BMI: 35.0–39.9
- Severely obese BMI: 40.0+
Use our weight converter above to see 120kg in stone, and try the BMI calculator to check your exact BMI based on your height.
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.
Weight Management Options and NHS Support
If you're carrying 120kg and concerned about your health, the NHS offers a structured approach to weight management across four tiers. Tier 1 includes self-help tools and digital programmes like the NHS Weight Loss Plan. Tier 2 provides primary care support through your GP, while Tier 3 involves specialist weight management services where prescription medications may be considered. Losing even 5–10% of your body weight — approximately 6–12kg — can significantly improve blood pressure, blood sugar control, and reduce cardiovascular risk. Your GP can discuss options that suit your individual circumstances, including lifestyle changes, behaviour support, and where appropriate, prescription weight management medications.
- 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 a healthy weight for a man who weighs 120kg?
Healthy weight depends on your height. A 120kg man who is 180cm tall needs to reach approximately 65–80kg for a healthy BMI (18.5–24.9). Use our BMI calculator above with your exact height to find your personal healthy weight range and BMI classification.
Is 120kg obese?
Whether 120kg is classified as obese depends on your height. For a man 180cm tall, 120kg gives a BMI of 37 (obese Class II). For someone 200cm tall, 120kg gives a BMI of 30 (obese Class I). Your height determines your BMI — check yours using the calculator on this page.
Can prescription weight loss medication help at 120kg?
Prescription weight management medications like Mounjaro or Wegovy are available in the UK for adults with a BMI of 30 or above (or 27+ with weight-related health conditions). These are prescription-only and require clinical assessment. Alongside a reduced-calorie diet and increased physical activity, they may help support weight loss, though individual results vary.
How much weight loss is realistic from 120kg?
Safe, sustainable weight loss is typically 0.5–1kg per week. From 120kg, aiming for 5–clinically studied weight loss (6–12kg) is a realistic initial goal with significant health benefits. Faster loss is possible with specialist support, but slower, steady loss is more sustainable long-term.
Should I see my GP about weighing 120kg?
Yes. Your GP can assess your overall health, discuss any weight-related conditions you may have, and support you with evidence-based weight management options. They may refer you to specialist services or recommend NHS programmes. They can also check for conditions like type 2 diabetes or high blood pressure that may be linked to excess weight.
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.