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 115 kg in stone?
115 kg is equal to 18 stone 2 pounds (18st 2lbs). To convert kilograms to stone, you divide by 6.35029 — the standard conversion factor used across the UK. This weight falls into the obese category according to NHS guidelines for most adults, though the health implications depend on your height, age, and overall fitness. Understanding your weight in both metric and imperial units helps you track health metrics more effectively, especially when using NHS resources or discussing weight with your GP. Our free weight converter above lets you check conversions instantly between kg, stone, and pounds.
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.
Conversion table: 115 kg and nearby weights
Here's a quick reference table showing 115 kg in stone alongside nearby weights to help you navigate the kg to stone conversion scale:
- 110 kg = 17st 4lbs
- 112 kg = 17st 9lbs
- 114 kg = 17st 13lbs
- 115 kg = 18st 2lbs
- 116 kg = 18st 4lbs
- 118 kg = 18st 8lbs
- 120 kg = 18st 13lbs
The conversion formula is simple: kg ÷ 6.35029 = stone. For a metric to imperial weight conversion, you can also multiply kg by 2.20462 to get pounds, then divide by 14 to convert to stone. At 115 kg, most adults would fall into the obese BMI category, though this depends on height — our free BMI calculator on this page will show your exact BMI instantly based on 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.
Is 115 kg a healthy weight? BMI context and NHS guidance
At 115 kg, whether your weight is healthy depends entirely on your height. For an average UK adult woman (5ft 4in / 163cm), 115 kg gives a BMI of approximately 38.4 — classified as obese (Class II) by NHS standards. For an average UK adult man (5ft 9in / 175cm), the same weight produces a BMI of around 37.5 — also Class II obesity. According to NHS guidelines, a healthy BMI sits between 18.5 and 24.9, though adults of South Asian, Chinese, Black African, or Black Caribbean heritage should aim for 18.5 to 22.9. Even a modest weight loss of 5–10% of body weight can improve blood pressure, blood sugar control, and cardiovascular health. Use our free BMI calculator above to check your personal BMI and healthy weight range based on your exact height and age.
- 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 115 kg to stone manually?
Divide 115 by 6.35029 to get 18.11 stone. Multiply the decimal (0.11) by 14 to convert to pounds: 0.11 × 14 = 1.54 lbs. So 115 kg = 18 stone 2 pounds. This calculation works for any kilogram to stone conversion you need.
What BMI is 115 kg?
BMI depends on height. At 5ft 4in (163cm), 115 kg gives BMI 38.4. At 5ft 9in (175cm), it's BMI 37.5. Both fall into Class II obesity by NHS standards. Use our free BMI calculator to find your exact BMI based on your height.
Is 115 kg overweight or obese?
At 115 kg, most adults fall into the obese category (BMI 30+) according to NHS guidelines. The specific classification depends on height. For South Asian or Black African adults, lower BMI thresholds apply, so your health risk assessment may be different. Speak to your GP for personalised guidance.
How much weight would I need to lose to reach a healthy BMI from 115 kg?
To reach BMI 24.9 (upper healthy range) at 5ft 4in, you'd need to lose about 24 kg (3st 12lbs) — roughly to 91 kg. At 5ft 9in, you'd aim for about 76 kg (12st), requiring a loss of 39 kg (6st 2lbs). These targets vary by individual height, age, and muscle mass — your GP can advise on a realistic, healthy target for you.
Can I use the weight converter to check other conversions?
Yes. Our free weight converter tool on this page lets you instantly convert between kg, stone, and pounds for any weight. Simply enter your weight in one unit and see the results in the others. It's useful for tracking weight in both metric and imperial systems, which many UK adults prefer.
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.