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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104 Lbs In Kg — Is This A Healthy Weight For You?
104 lbs is equivalent to approximately 47.2 kg. However, whether this weight is healthy for you depends entirely on your height, age, and individual circumstances. A weight that is healthy for someone 5 feet tall would be overweight for someone shorter, and underweight for someone taller. This guide explains how to check if 104 lbs fits within the healthy weight range for your specific height using NHS guidance, plus how to convert pounds to kg accurately.
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 By Height For 104 Lbs (47.2 kg)
Whether 104 lbs is a healthy weight depends on your height. Use our free BMI calculator above to check your personal BMI instantly. Here are three concrete examples showing how the same weight can be healthy, overweight, or underweight at different heights:
- At 5ft 2in (157 cm): 104 lbs gives a BMI of 19.0 — this is within the healthy weight range (18.5–24.9).
- At 4ft 10in (147 cm): 104 lbs gives a BMI of 21.2 — healthy weight range, though towards the lower end.
- At 5ft 8in (173 cm): 104 lbs gives a BMI of 15.8 — this is underweight (below 18.5) and may indicate insufficient nutrition.
To convert kilograms to stone and pounds for comparison, 47.2 kg equals approximately 7 stone 5 lbs. The healthy weight range at any given height spans from a BMI of 18.5 to 24.9. Your GP can give you personalised advice about what's healthy for your individual circumstances.
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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: What To Do If You're Outside The Healthy Range
The NHS recommends a healthy BMI between 18.5 and 24.9 for most UK adults. If you calculate your BMI and find you're outside this range, don't worry — small adjustments can make a difference. If you're underweight (BMI below 18.5), focus on nutrient-dense foods and speak to your GP if you're struggling to maintain weight. If you're overweight (BMI 25–29.9) or obese (BMI 30+), the NHS suggests a sustainable approach: aim to lose around 0.5–1 kg per week through balanced eating and increased physical activity.
Waist measurement also matters: For men, increased health risk starts at 94 cm (37 in); for women, at 80 cm (31.5 in). Use our free weight converter above to switch between lbs, kg, and stone and pounds easily, then use our BMI calculator to check your personal health status.
- 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 104 lbs in kg exactly?
104 lbs = 47.17 kg (rounded to 47.2 kg). To convert pounds to kilograms, divide by 2.20462. In stone and pounds, 104 lbs = 7 stone 6 lbs. Use our weight converter above for instant conversions between all UK measurements.
Is 104 lbs a healthy weight?
It depends on your height. At 5ft 2in, 104 lbs is healthy (BMI 19). At 4ft 10in, it's also healthy (BMI 21.2). But at 5ft 8in, it's underweight (BMI 15.8). Use our BMI calculator to check your personal BMI based on your actual height.
What does NHS say about healthy weight?
The NHS defines healthy weight as a BMI between 18.5 and 24.9 for most UK adults. For people of South Asian, Chinese, Black African, or Caribbean heritage, the healthy range is slightly lower: 18.5 to 22.9. Your GP can advise if you're concerned about your weight.
How do I know if I need to lose or gain weight?
Calculate your BMI using your height and current weight. If your BMI is below 18.5, you may be underweight. If it's 25–29.9, you're overweight. If it's 30+, you're in the obese category. The NHS recommends losing 0.5–1 kg per week if you're overweight. Always consult your GP for personalised guidance.
How can I track weight changes over time?
Keep a record of your weight weekly at the same time of day. Use our free progress tracker to log your weight and see trends over weeks and months. Small, consistent changes are more meaningful than daily fluctuations, which are normal.
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.