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
What's the Perfect Weight for a 5ft 4in Woman?
There's no single "perfect" weight for a 5ft 4in woman — instead, the NHS recommends aiming for a healthy weight range based on your BMI. For someone of your height, a healthy BMI (18.5–24.9) typically falls between approximately 47kg and 63kg (7st 5lbs to 9st 13lbs). However, your ideal weight depends on factors like muscle mass, bone density, frame size, and overall health. Use our free BMI calculator above to find where you fall and discuss your personal target with your GP, who can give tailored health advice based on your individual circumstances.
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.
NHS Healthy Weight Ranges for 5ft 4in Women
For a 5ft 4in (163cm) adult woman, the NHS defines healthy weight as a BMI between 18.5 and 24.9. This translates to approximately:
- Lower healthy range: 47kg (7st 5lbs)
- Upper healthy range: 63kg (9st 13lbs)
- Average midpoint: approximately 55kg (8st 9lbs)
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds (BMI 18.5–22.9), as these groups face higher health risks from excess weight at lower BMI levels. Your GP can help assess whether you fall into an ethnic-specific category and what weight range is most appropriate for your health profile. It's important to remember that BMI is a screening tool — it doesn't account for muscle mass or bone density, so two women of identical height and weight may have different body compositions and health profiles.
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.
Beyond BMI — Other Health Measurements
While BMI provides a useful starting point, the NHS also considers waist circumference as an important health indicator. For women, a waist measurement above 80cm (31.5 inches) suggests increased health risk, whilst above 88cm (34.5 inches) indicates high risk, regardless of BMI. You can measure your waist at its narrowest point, just above your hip bones. Combining your BMI with your waist measurement gives a more complete picture of your health risk. Our free weight converter makes it easy to track your progress in both kg and stone — simply log your measurements regularly and discuss trends with your GP to build a personalised health plan suited to your lifestyle and goals.
- 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's the healthy weight for a 5ft 4in woman?
The NHS defines healthy weight for this height as approximately 47–63kg (7st 5lbs to 9st 13lbs), corresponding to a BMI of 18.5–24.9. However, ideal weight varies by individual factors including muscle mass, genetics, and overall health. Your GP can advise on a personal target based on your circumstances.
Is 70kg overweight for a 5ft 4in woman?
At 5ft 4in (163cm), a weight of 70kg gives a BMI of approximately 26.3, which falls into the NHS "overweight" category (25–29.9). This means modest weight reduction may benefit your health, though your GP can assess your individual risk factors and whether weight loss is recommended for you.
How can I calculate my healthy weight range?
Multiply your height in metres squared by 18.5 (lower limit) and 24.9 (upper limit). For 5ft 4in (1.63m): lower = 49.2kg, upper = 66.1kg. However, use our free BMI calculator above — it's faster and accounts for your exact measurements and ethnic background where relevant.
Does muscle weight affect my healthy weight?
Yes — BMI doesn't distinguish between muscle and fat. If you're muscular or athletic, you may have a higher BMI but lower body fat percentage. Discuss your fitness level with your GP; they may recommend additional measurements like waist circumference or body composition analysis for a clearer picture.
What if I'm significantly above the healthy range?
If your weight is well above the healthy range for your height, it's worth speaking with your GP. They can assess your health risk factors, discuss sustainable weight management strategies, and potentially refer you to NHS specialist services if appropriate. Even a 5–clinically studied weight loss can improve blood pressure, blood sugar, and cholesterol levels.
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.