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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What is 117 kg in stones and what does it mean for your BMI?
117 kg is equivalent to 18 stone and 5 pounds in UK measurements. However, your BMI depends on your height — not just your weight. At 117 kg, your BMI could range from around 21 to 41 depending on how tall you are. This guide shows you what your BMI means at different heights using NHS categories, and explains why height matters when assessing whether a weight is healthy.
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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.
117 kg BMI at different heights
To find your BMI, you need both your weight and height. At 117 kg, here's what your BMI would be at common UK heights:
- 160 cm (5ft 3in): BMI 45.6 — Severely obese (Class III)
- 165 cm (5ft 5in): BMI 42.9 — Severely obese (Class III)
- 170 cm (5ft 7in): BMI 40.5 — Severely obese (Class III)
- 175 cm (5ft 9in): BMI 38.2 — Obese (Class II)
- 180 cm (5ft 11in): BMI 36.0 — Obese (Class II)
- 185 cm (6ft 1in): BMI 34.1 — Obese (Class I)
Use our free BMI calculator above to find your exact BMI by entering your height and weight — this gives you a personalised result in seconds.
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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.
Understanding NHS BMI categories and limitations
The NHS classifies BMI results into six categories. A BMI under 18.5 is underweight, 18.5–24.9 is healthy weight, 25–29.9 is overweight, 30–34.9 is obese (Class I), 35–39.9 is obese (Class II), and 40+ is severely obese (Class III). However, BMI has important limitations. It does not distinguish between muscle and fat — athletes may have a high BMI but low body fat. BMI also doesn't account for where fat is stored (waist measurement matters too), and it may be less accurate for older adults or people with significant muscle mass. Your GP can provide personalised advice about what your BMI means for your individual health.
- 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.
How do I convert 117 kg to stones and pounds?
Divide 117 by 6.35029 to get 18.4 stone. This equals 18 stone and 5.6 pounds (or 18 stone 5-6 lbs). Use our free weight converter on this page to switch between kg, stone, and pounds instantly.
What BMI category does 117 kg fall into?
This depends entirely on your height. At 170 cm (5ft 7in), 117 kg gives a BMI of 40.5 (severely obese). At 185 cm (6ft 1in), it gives 34.1 (obese Class I). Your height makes a significant difference — use the BMI calculator above to find your personal BMI.
Is 117 kg a healthy weight?
Whether 117 kg is healthy depends on your height, age, sex, and overall health. For most adults, this weight would result in a BMI in the obese range. Your GP can assess whether this weight is appropriate for you and discuss any health concerns or support available.
What is the healthy weight range at my height?
Your healthy BMI range (18.5–24.9) creates a weight range that varies by height. At 170 cm, healthy weight is roughly 53–72 kg. At 180 cm, it's about 60–81 kg. Use our BMI calculator to find the exact healthy weight range for your specific height.
Can I track my weight loss progress from 117 kg?
Yes. Our free progress tracker allows you to log your weight, track changes over time, and see your progress visually. Recording your weight weekly helps you stay motivated and identifies whether your approach is working toward your goals.
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.