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 122 Lbs (55.3 Kg) a Healthy Weight?
122 pounds converts to approximately 55.3 kilograms. Whether this weight is healthy for you depends entirely on your height, age, and individual health factors. Using NHS guidelines, we'll show you how to determine if this weight falls within a healthy range for your body, plus practical steps to assess your personal health status with our free tools.
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 at Different Heights
122 lbs (55.3 kg) falls within the healthy weight range for some adults but is overweight for others, depending on height. Here are three concrete examples using NHS BMI categories:
- 5ft 10in (178 cm): 55.3 kg gives a BMI of 19.6 — healthy weight range ✓
- 5ft 5in (165 cm): 55.3 kg gives a BMI of 22.1 — healthy weight range ✓
- 5ft 2in (157 cm): 55.3 kg gives a BMI of 22.5 — healthy weight range ✓
- 5ft 0in (152 cm): 55.3 kg gives a BMI of 23.9 — healthy weight range ✓
To convert your weight across kg to stone, stone to kg, or other metric to imperial weight measurements instantly, use the weight converter on this page. Calculate your personal BMI using our free BMI calculator above to see exactly where you stand.
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 Healthy Weight Guidance & Next Steps
According to NHS guidelines, a healthy BMI is 18.5 to 24.9 for most adults. If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a slightly lower threshold of 18.5 to 22.9 due to higher health risks at lower weights.
Beyond BMI, waist measurement matters too. A healthy waist circumference is under 94 cm (37 inches) for men and under 80 cm (31.5 inches) for women. If your weight or waist measurement concerns you, speak with your GP, who can assess your individual health context and recommend personalised guidance.
- 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 converted to kilograms?
122 pounds equals approximately 55.3 kilograms. The exact conversion uses the factor 1 lb = 0.453592 kg. For quick conversions between lbs, kg, and stone, use our free weight converter tool on this page.
Is 122 lbs a healthy weight for all adults?
No. Whether 122 lbs is healthy depends on your height. At 5ft 5in it's healthy; at 4ft 10in it may be overweight. Use our BMI calculator to check your personal BMI instantly — it's the most reliable way to see if your weight is healthy for your height.
What BMI does 122 lbs give?
At 122 lbs, your BMI depends on your height. For example, at 5ft 7in, 122 lbs gives a BMI of about 19.1 (healthy). At 5ft 2in, it's about 22.5 (healthy). Calculate your exact BMI above using our free calculator.
What if my weight is outside the healthy range?
If your BMI is above 25 or below 18.5, discuss it with your GP. They can assess your individual health, medical history, and recommend appropriate next steps — whether that's lifestyle changes, referral to a weight management service, or other support.
Does waist measurement matter as much as weight?
Yes. The NHS recommends checking both BMI and waist circumference, as fat distribution around the stomach carries higher health risks than weight alone. A healthy waist is under 94 cm for men and 80 cm for women.
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.