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 17.3 Kg in Lbs a Healthy Weight?
17.3 kg converts to approximately 38.1 lbs. Whether this weight is healthy for you depends entirely on your height, age, and body composition. A weight that's healthy for one person may be underweight or overweight for another. This guide shows you how to assess whether 17.3 kg is right for your height using NHS guidelines, and how to use the free weight converter and BMI calculator on this page to check your personal healthy weight range.
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 — 17.3 Kg Context
At 17.3 kg, you would be significantly underweight for almost any adult. However, if you're looking at this weight for a child, different standards apply — children use age and sex-specific charts, not adult BMI categories.
For context, here are healthy weight ranges for different adult heights using NHS guidelines (BMI 18.5–24.9):
- 5ft 2in (158 cm): Healthy weight range 46–63 kg (101–139 lbs)
- 5ft 6in (168 cm): Healthy weight range 52–72 kg (115–159 lbs)
- 5ft 10in (178 cm): Healthy weight range 59–82 kg (130–180 lbs)
You can calculate your exact healthy weight range using our free BMI calculator above. If your weight falls outside the healthy range shown, speaking with your GP is important — whether underweight or overweight, both can indicate underlying health concerns.
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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.
What to Do If Your Weight Is Outside the Healthy Range
The NHS recommends maintaining a healthy weight through balanced nutrition and regular physical activity. Waist measurement is also important: the NHS suggests men keep waist circumference under 94 cm (37 inches) and women under 80 cm (31.5 inches) for good health.
If you're significantly underweight or overweight, your GP can provide personalised advice and, if needed, refer you to specialist weight management services. You can also use our free weight converter above to check your current weight in different units (stone, lbs, kg), and track changes over time with our progress tracker to see if your weight is moving towards a healthier range.
- 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 17.3 kg in pounds exactly?
17.3 kg equals approximately 38.14 lbs. To convert any weight in kilogrammes to stone and pounds (the standard UK measurements), divide by 6.35029. You can use the weight converter on this page for instant conversions between kg, stone, and lbs.
Is 17.3 kg a healthy weight for an adult?
17.3 kg would be significantly underweight for any adult. A healthy adult weight depends on height — typically ranging from 46 kg for shorter adults to over 80 kg for taller adults. Use our free BMI calculator to find your personal healthy range based on your height.
How do I know if my weight is healthy for my height?
Calculate your BMI using your height and weight — the NHS healthy BMI range is 18.5–24.9. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the healthy range is 18.5–22.9. Our BMI calculator above does this instantly and shows where you fall.
What should I do if I'm underweight or overweight?
If your weight is outside the healthy range, speak with your GP. They can assess your individual health and, if appropriate, refer you to weight management services. Both underweight and overweight can indicate health concerns requiring personalised advice.
What's the difference between kg, stone, and lbs in UK measurements?
In the UK, weight is commonly expressed in stone and pounds (imperial) or kilogrammes (metric). 1 stone = 6.35 kg = 14 lbs. The weight converter on this page instantly switches between all three measurements — try it now to check your weight in your preferred units.
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.