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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Is 107 Lbs a Healthy Weight? Convert to Kg and Check
107 lbs is approximately 48.5 kg — but whether this is a healthy weight for you depends entirely on your height. The same weight can be underweight for a tall person or overweight for someone shorter. Using the standard kg to stone conversion, 48.5 kg equals about 7 stone 8 lbs. To understand what your weight means for your health, you need to calculate your BMI using both your weight and height. Our free BMI calculator above helps you find your personal BMI instantly and see where you fall on the NHS health guidance scale.
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
At 107 lbs (48.5 kg), your weight status depends on your height. Here are three practical examples:
- At 5ft 2in (157cm): 48.5 kg gives a BMI of 19.7 — this falls in the healthy weight range (18.5–24.9) according to NHS guidelines.
- At 5ft 6in (168cm): 48.5 kg gives a BMI of 17.3 — this is below the healthy range, suggesting underweight status.
- At 4ft 10in (147cm): 48.5 kg gives a BMI of 22.5 — this is comfortably within the healthy weight range.
To convert kilograms to stone for UK context, divide the kg value by 6.35. At 48.5 kg, you're carrying 7 stone 8 lbs. This illustrates why height context is essential — the same weight in stone and pounds can represent very different health statuses. Use our weight converter above to check your personal metric to imperial weight instantly.
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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 UK adults. If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, slightly lower thresholds apply (18.5–22.9), as these groups face higher health risks at the same BMI. Waist measurement also matters — the NHS advises keeping waist circumference below 80cm (31.5in) for women and below 94cm (37in) for men to reduce cardiovascular risk. If your weight falls outside the healthy range for your height, speaking to your GP is a sensible next step. Your GP can offer personalised advice, rule out any underlying health conditions, and discuss sustainable approaches to reaching or maintaining a healthy weight for you.
- 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 107 lbs in kg exactly?
107 lbs equals 48.54 kg (often rounded to 48.5 kg). To convert pounds to kilograms, divide the lb value by 2.20462. This is useful when reading NHS health guidance, which typically uses metric measurements, though many UK adults find stone and pounds more familiar.
Is 107 lbs underweight, healthy, or overweight?
It depends on your height. At 5ft 2in, 107 lbs is healthy (BMI 19.7). At 5ft 6in, it's underweight (BMI 17.3). At 4ft 10in, it's healthy (BMI 22.5). Use our free BMI calculator above to check your personal status instantly based on your exact height.
What's the healthy weight range for my height?
The NHS healthy weight range depends on your height and is calculated using BMI (18.5–24.9). Our weight converter and BMI calculator on this page help you find your personal healthy range. For example, at 5ft 6in, the healthy range is approximately 7st 10lbs to 10st 4lbs (49–65 kg).
Should I be concerned if my weight is 107 lbs?
Not necessarily — weight alone doesn't indicate health. BMI, waist circumference, fitness level, and medical history all matter. If you're concerned about your weight or health, speak to your GP. They can offer personalised advice and rule out any underlying health conditions affecting your weight.
How do I know if I'm in a healthy weight range?
Calculate your BMI using your height and weight — use our free BMI calculator above. The NHS considers a BMI of 18.5–24.9 healthy for most adults. You can also check your waist measurement: NHS guidance recommends below 80cm for women and below 94cm for men to reduce disease risk.
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.