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 Ideal Weight for a 5ft 7 Woman?
At 5ft 7 inches (170 centimetres), a healthy weight range for adult women is approximately 50.5 to 68 kg (7st 12lbs to 10st 9lbs) according to NHS guidelines. This range is based on a BMI between 18.5 and 24.9, which the NHS recognises as healthy weight for most adults. Your ideal weight within this range depends on factors like muscle mass, bone density, and overall health rather than a single "perfect" number. Use our free BMI calculator above to check where your current weight falls and explore your personalised healthy weight range.
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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 Range at 5ft 7 — BMI Explained
For a woman who is 5ft 7 inches (170 cm) tall, the healthy weight range is 50.5 to 68 kg, which converts to approximately 7st 12lbs to 10st 9lbs in UK measurements. This range corresponds to a BMI of 18.5 to 24.9, the NHS standard for healthy weight.
- Lower end: 50.5 kg (7st 12lbs) — BMI 18.5
- Upper end: 68 kg (10st 9lbs) — BMI 24.9
- Mid-range: approximately 59 kg (9st 4lbs) — BMI 20.4
It's important to note that BMI is a screening tool and doesn't account for muscle mass. Someone with significant muscle may have a higher BMI but still be very healthy. If you're unsure about your personal ideal weight, your GP can provide guidance based on your individual health profile. Try the weight converter on this page to check what other measurements mean at your height.
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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.
Weight Categories and Average Context at Your Height
At 5ft 7, here's how different weights fall into NHS categories:
- Under 47.6 kg (7st 6lbs): Underweight (BMI below 18.5)
- 47.6–50.4 kg (7st 6lbs–7st 12lbs): Healthy weight lower range
- 68–71.6 kg (10st 9lbs–11st 3lbs): Overweight (BMI 25–27.9)
- Above 71.6 kg (11st 3lbs): Obese categories begin
The average UK woman weighs approximately 71.6 kg (11st 3lbs), which puts many women slightly into the overweight category. Remember that ethnicity affects health risk at the same BMI — South Asian, Black African, Black Caribbean, and Chinese women may face higher health risks at lower weights and should consult their GP about personalised targets.
- 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 weight should a 5ft 7 woman aim for?
According to NHS guidelines, a healthy weight range at 5ft 7 is 50.5–68 kg (7st 12lbs–10st 9lbs). Your ideal weight within this range depends on your muscle mass, bone structure, and overall health. Your GP can help you set a personal target based on your individual circumstances. Use our BMI calculator above to find where you sit now.
Is 5ft 7 tall for a woman in the UK?
At 5ft 7 inches (170 cm), a woman is slightly taller than the UK average. The average UK woman is approximately 5ft 3.5 inches (161.6 cm), so 5ft 7 is about 3.5 inches above average. Height varies naturally and doesn't affect the healthy weight range calculation.
What BMI should a woman who is 5ft 7 aim for?
The NHS recommends a BMI between 18.5 and 24.9 for healthy weight. At 5ft 7, this equals a weight range of 50.5–68 kg. A BMI above 25 is classified as overweight, and above 30 as obese. However, BMI doesn't account for muscle mass, so discuss your personal target with your GP.
How much should I weigh at 5ft 7 if I'm very muscular?
If you have significant muscle mass, you may weigh more than the standard healthy BMI range suggests, because muscle is denser than fat. In this case, body composition matters more than BMI alone. Your GP or a fitness professional can assess whether your weight is healthy for your body composition.
What's the difference between ideal weight and healthy weight range?
"Healthy weight range" is the broad NHS-recommended range based on BMI (50.5–68 kg at 5ft 7). "Ideal weight" is your personal target within that range, which depends on your individual health, fitness level, and lifestyle. Rather than chasing a single number, focus on how you feel and what your GP recommends for your health.
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.