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
Average Weight for a 5'1" Female — What's Healthy?
For a female who is 5'1" (155 cm) tall, the NHS healthy weight range is approximately 47–63 kg (7 stone 5 lbs to 9 stone 13 lbs). This range is based on a healthy BMI of 18.5 to 24.9, which represents the weight that carries the lowest health risks. However, the ideal body weight for any individual depends on factors like age, muscle mass, frame size, and overall health. Use our free BMI calculator above to check your personal BMI and discover where your weight falls within the healthy weight range for your height.
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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 Range for 5'1" Females — BMI Breakdown
The healthy weight range for a 5'1" female is 47–63 kg (7 stone 5 lbs to 9 stone 13 lbs), based on NHS BMI guidelines. This translates to a BMI of 18.5 to 24.9, which the NHS considers a healthy weight for adults.
- Lower bound (BMI 18.5): 47 kg (7 stone 5 lbs) — minimum healthy weight
- Upper bound (BMI 24.9): 63 kg (9 stone 13 lbs) — maximum healthy weight
- Overweight threshold (BMI 25): 63.5 kg (10 stone 0 lbs)
- Obese threshold (BMI 30): 76 kg (12 stone 0 lbs)
The average UK weight for adult females is approximately 71.6 kg (11 stone 3 lbs), though this includes women of all heights and body types. For someone 5'1", a weight in the lower to middle range of the healthy scale is optimal. However, muscle mass, bone density, and individual health factors mean your ideal weight may vary slightly. Use our free weight converter above to switch between kg and stone instantly for your personal health records.
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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.
Using BMI to Find Your Healthy Weight Range
The BMI (Body Mass Index) formula divides weight in kilograms by height in metres squared. For a 5'1" female, this means any weight between 47–63 kg produces a healthy BMI. Your GP can provide personalised advice about where within this range is healthiest for you, considering your age, fitness level, and medical history.
BMI has limitations — it doesn't distinguish between muscle and fat, so athletes may have a higher BMI despite low body fat. However, for most people, BMI is a useful screening tool. If your weight falls outside the healthy range, even a loss of 5–10% of your body weight can improve health outcomes including blood pressure, blood sugar control, and cardiovascular risk. Calculate your personal BMI now using the BMI calculator on this page to see where you stand.
- 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 the average weight for a 5'1" female in the UK?
The average UK adult female weighs approximately 71.6 kg (11 stone 3 lbs), but this includes women of all heights. For someone 5'1", the healthy weight range specifically is 47–63 kg (7 stone 5 lbs to 9 stone 13 lbs) according to NHS BMI guidelines.
Is there a difference between average weight and healthy weight?
Yes. Average weight is what people actually weigh on average; healthy weight is what the NHS recommends for good health. For a 5'1" female, the average may be higher than the healthy range because many UK adults are overweight. Your healthy weight range is more important for your health outcomes.
How do I calculate my ideal weight for my height?
Use our free BMI calculator above to find your personal healthy weight range. Alternatively, multiply your height in metres squared by 18.5 (lower bound) and 24.9 (upper bound) to calculate the kg range. Your GP can also help determine your ideal weight based on your individual health.
Does muscle mass affect whether I'm in a healthy weight range?
Yes. BMI doesn't distinguish between muscle and fat. Someone with high muscle mass may have a BMI in the overweight range but still be very healthy. If you're athletic or strength-train regularly, discuss your weight with your GP rather than relying on BMI alone.
What if my weight is above the healthy range for 5'1"?
If your weight is above 63 kg (9 stone 13 lbs), you may wish to discuss weight management with your GP. Even a modest loss of 5–10% of your body weight can improve health markers. Your GP can advise on safe, sustainable approaches including diet, exercise, or, if appropriate, referral to weight management services.
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.