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 BMI Is 122 Lbs In Kg?
122 lbs converts to approximately 55.34 kg. However, your BMI depends entirely on your height — the same weight gives very different health classifications at different heights. Below, we show what BMI 122 lbs (55.34 kg) produces at common UK heights, and where each falls in the NHS weight categories. Use our free BMI calculator above to check your personal BMI instantly based on your exact height and weight.
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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.
122 Lbs (55.34 kg) BMI At Different Heights
At 5ft 0in (152 cm): BMI = 24.1 (Healthy weight)
At 5ft 2in (157 cm): BMI = 22.5 (Healthy weight)
At 5ft 4in (163 cm): BMI = 20.8 (Healthy weight)
At 5ft 6in (168 cm): BMI = 19.3 (Healthy weight)
At 5ft 8in (173 cm): BMI = 18.0 (Healthy weight)
At 5ft 10in (178 cm): BMI = 16.8 (Underweight)
As you can see, 122 lbs (55.34 kg) falls within the healthy weight range for most adult heights, and only becomes underweight for taller individuals. If you're unsure about your height, convert kilograms to stone or use our weight converter to see your weight in different units, then calculate your BMI using the tool on this page.
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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 Weight Categories & BMI Limitations
According to NHS guidelines, a healthy BMI is 18.5 to 24.9. At 122 lbs, you're likely in a healthy range unless you're significantly taller than average. BMI is a useful screening tool but has important limitations — it does not distinguish between muscle and fat, so athletes may have a high BMI despite low body fat. BMI also doesn't account for where fat is stored; waist circumference matters for health risk. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower BMI thresholds (18.5 to 22.9 as healthy weight). Always discuss your personal health and weight with your GP.
- 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 122 lbs in kilograms?
122 lbs equals 55.34 kg. To convert, divide pounds by 2.20462. This metric measurement is the standard used by the NHS and most UK healthcare providers.
Is 122 lbs a healthy weight?
It depends entirely on your height. For most UK adults (5ft 2in to 5ft 8in), 122 lbs is a healthy weight with a BMI in the 18–24 range. Shorter individuals may be slightly overweight; taller individuals may be underweight. Use our BMI calculator to check your personal BMI.
How do I convert 122 lbs to stone and pounds?
122 lbs equals 8 stone 10 lbs. To convert lbs to stone, divide by 14. Our free weight converter above can do this instantly in both directions — perfect for switching between metric and imperial weight measurements.
What is BMI and why does it matter?
BMI (Body Mass Index) is weight in kg divided by height in metres squared. It's a screening tool for health risk. A healthy BMI (18.5–24.9) is associated with lower risk of weight-related diseases like type 2 diabetes and heart disease, though BMI has limitations and doesn't account for muscle mass.
Should I lose weight if I'm 122 lbs?
Not necessarily — it depends on your height, muscle mass, and overall health. If your BMI is in the healthy range (18.5–24.9) and you feel well, no weight loss is needed. If you have concerns, speak to your GP who can give personalised advice about your health.
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.