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 77.5 Kilos in Pounds and Your BMI?
77.5 kilograms converts to approximately 170.9 pounds. However, what matters most for your health isn't just the weight itself — it's your BMI, which depends on your height. At 77.5kg, your BMI ranges from 25.3 to 33.5 depending on how tall you are, spanning from overweight into the obese category according to NHS guidelines. Use our free BMI calculator above to find your exact BMI and discover which NHS health category you fall into.
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.
77.5kg BMI at Different Heights
At 77.5kg (170.9 lbs), your BMI varies significantly with height. Here are BMI examples across typical adult heights:
- 5ft 2in (158cm) — BMI 29.3 (overweight)
- 5ft 4in (163cm) — BMI 27.6 (overweight)
- 5ft 6in (168cm) — BMI 25.8 (overweight)
- 5ft 8in (173cm) — BMI 25.1 (overweight)
- 5ft 10in (178cm) — BMI 24.5 (healthy weight)
- 6ft 0in (183cm) — BMI 23.1 (healthy weight)
To convert kilograms to stone, divide by 6.35 — so 77.5kg equals approximately 12 stone 3 lbs in UK measurements. These examples show why height matters: the same weight in pounds or stone can be healthy for one person and overweight for another.
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.
Understanding NHS BMI Categories
According to NHS guidelines, BMI categories are:
- Below 18.5 — Underweight
- 18.5–24.9 — Healthy weight
- 25.0–29.9 — Overweight
- 30.0–34.9 — Obese (Class I)
- 35.0+ — Obese (Class II or III)
It's important to remember that BMI has limitations — it doesn't distinguish between muscle and fat, and waist circumference also matters for health. For South Asian, Chinese, Black African, or Black Caribbean adults, lower thresholds apply. Use the weight converter on this page to switch between kg, stone, and lbs, then calculate your personal BMI with our free calculator.
- 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 77.5kg in pounds?
77.5kg equals approximately 170.9 pounds (or 12 stone 3 lbs in UK measurements). To convert kilos to pounds, multiply by 2.20462. To convert kilograms to stone, divide by 6.35029. Both conversions are exact mathematical calculations used across the NHS and health services.
Is 77.5kg overweight?
Whether 77.5kg is overweight depends entirely on your height. At 5ft 6in it's overweight (BMI 25.8), but at 5ft 10in it's healthy (BMI 24.5). Use our free BMI calculator to enter your height and see your exact category according to NHS guidelines.
What's the healthy weight range at my height?
To find your healthy weight range, a healthy BMI is 18.5–24.9 according to NHS guidelines. Multiply 18.5 by your height in metres squared for the lower bound, and 24.9 for the upper bound. For example, at 5ft 8in (1.73m), healthy weight is 55–74kg (8st 10lbs–11st 8lbs).
How do I know if 77.5kg is right for me?
Your ideal weight depends on your height, age, muscle mass, genetics, and overall health. At 77.5kg, use our BMI calculator to find your category, then speak with your GP if you'd like personalised advice about your weight and health.
Should I use stone and pounds or kilograms?
Both are valid — the NHS uses kilograms (kg) for clinical measurements, but UK adults often prefer stone and pounds in daily life. Use our weight converter to switch between all three units (kg, stone, and lbs) depending on what feels most natural to you.
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.