Lose weight you can actually keep off.
Most GLP-1 users watch the scale. Calqulate watches what the scale cannot.
40%
of the weight you lose on a GLP-1 can be muscle.
Muscle is what keeps the weight off. Lose it, and your metabolism slows, and the weight finds its way back the moment you stop.
The scale shows one number. It never tells you which half is which.
Across published GLP-1 trials, lean mass accounted for roughly 25 to 39 percent of the total weight lost, a higher share than diet alone typically produces. Prado CM, Phillips SM, Gonzalez MC, Heymsfield SB. “Muscle matters: the effects of medically induced weight loss on skeletal muscle.” The Lancet Diabetes & Endocrinology, 2024.
You lost 30 pounds. But what did you actually lose?
Move the sliders. This is the difference between weight you keep off and weight that comes back.
At this rate you are burning the muscle that protects your metabolism. This is how people regain.
This is a simulation, not a measurement of you. It starts from the published GLP-1 range above, where lean mass made up roughly 25 to 39 percent of the weight lost, and lowers that share as protein intake and resistance training go up, because both are shown to blunt lean mass loss during energy restriction. Your real split depends on your rate of loss, your protein, your training and your starting composition, and only a body composition measurement can tell you what it actually is. Cava E, Yeat NC, Mittendorfer B. “Preserving healthy muscle during weight loss.” Advances in Nutrition, 2017.
People do not fail on GLP-1s because the medicine does not work
The medicine works. It works extremely well. People fail because nobody tells them what to do around it.
They lose muscle, not just fat
Up to 40 percent of the weight lost on a GLP-1 can be muscle. Muscle is what keeps your metabolism high, so losing it is how the weight finds its way back.
They do not eat enough protein
The drug kills your appetite. That is the point. But it also makes protein the easiest thing in the world to under-eat, and protein is what protects your muscle.
They get blindsided by a plateau
Progress stalls, they assume the drug stopped working, and they quit. Most plateaus are predictable weeks before they happen.
They mistime the dose
Cravings return late in the cycle when the medication level drops. Knowing where you are in that curve changes how you plan your week.
They tough out side effects alone
Nausea and fatigue spike after a dose increase. Knowing that is normal, and when it should pass, is the difference between staying on and giving up.
They stop, and regain
Nobody prepared them for what happens after. The people who keep the weight off protected their muscle while they were losing it.
Calqulate Vitals is the daily companion that handles all six.
From one number to your whole trajectory
Most people on a GLP-1 are flying blind with a bathroom scale. Here is what changes.
You track your weight.
That is it. That is the whole picture.
184.2
lb
How much medication is still working today
How much of your loss is fat, and how much is muscle
Whether a plateau is coming
Why your progress slowed
What to eat, and when to train
When you will reach your goal
How your heart is ageing
A report your doctor can actually use
You are not just losing weight. You are changing your trajectory.
It starts with one number. It ends with keeping the weight off.
- 1Today
You get an answer
Your dose, your fat-versus-muscle split, your numbers. Free, no account, thirty seconds.
- 2Week 2
You start logging
Every injection, every weigh-in. The medication curve starts to mean something.
- 3Month 2
Patterns appear
You can see why some weeks work and some do not. Cravings, sleep, protein, dose day.
- 46 months
You are ahead of it
Plateaus stop surprising you. You know when to hold a dose and when to push.
- 51 year
You kept it off
Because you protected the muscle that keeps your metabolism running. That was the whole game.
Calculate. Track. Understand. Improve.
Most people arrive here looking for one number. They stay because the number was only the beginning.
Calculate
Get today's answer, free, no account.
- GLP-1 dose calculator
- Fat vs muscle check
- Weight loss percentage
- Protein and lean mass
- Body fat percentage
- Daily calories
Track
Then you realize you need to do this every week.
- Every injection
- Weight and body composition
- Protein, food and water
- Side effects and energy
- Exercise
- Refills and supply
Understand
Now the data starts telling you things.
- How much medication is active today
- Whether you are losing fat or muscle
- When a plateau is coming
- Why your progress slowed
- How you compare to the trials
- What to do next, every week
Improve
And you start making better decisions.
- A protein target you will actually hit
- Training that protects your muscle
- Dose timing around your life
- Reports your doctor can use
- A forecast of your goal date
- A plan for when you come off
Explore the Products
Three flagship trackers, one plan. Pick your starting point and see exactly what Premium unlocks.
The scale is dropping. The food noise is gone.
This is why you started. Effortless weight loss, appetite finally silenced.
But what are you actually losing?
Every pound on the scale is muscle and metabolism too — and one dosing error makes it worse.
Stronger. Leaner. Biologically younger.
Calqulate perfects your dose, protects your muscle, and turns your heart age back.
The scale is dropping. The food noise is gone.
This is why you started. Effortless weight loss, appetite finally silenced.
But what are you actually losing?
Every pound on the scale is muscle and metabolism too — and one dosing error makes it worse.
Stronger. Leaner. Biologically younger.
Calqulate perfects your dose, protects your muscle, and turns your heart age back.
From a one-time number to a health trajectory.
Calqulate Vitals turns your numbers into a tracked score, validated risk models, and the single highest-impact change to make next.
Compute
Run every clinical engine free and stateless - no login required.
Save & track
Trend your Metabolic Health Score, heart age, and 10-yr ASCVD & diabetes risk over time.
Act
A weighted risk-graph engine surfaces your single highest-impact 'next lever.'
Sample score trending up over six measurements.
Built on validated, published models: Pooled Cohort Equations (ASCVD), Framingham (heart age), and FINDRISC (type-2 diabetes risk). Educational decision-support - not medical advice.
More than a tracker — a model of your future self
First-principles health: break your biology into measurable systems, model reality, and get god-mode control over your trajectory.
Longevity Index (0–1000)
One number that rolls up cardiovascular, metabolic, body-composition, fitness and glucose control - with the exact levers to raise it.
Biological age
A transparent biomarker-weighted estimate of how old your body really is, and the top drivers aging you faster.
“Future You” simulator
A Monte-Carlo engine projects your weight, score and heart age 6–60 months out - across optimistic, realistic and pessimistic adherence, with honest confidence bands.
3D body + organ systems
An interactive avatar that morphs with your composition, plus per-organ biological-age gauges (heart, liver, pancreas, brain, muscle).
GLP-1 Autopilot
An adaptive 12–24 week titration + protein + training protocol that adjusts to your logged side-effects and progress.
Mobile + weekly email
Opt-in mobile notifications and a week-on-week progress email so your trajectory stays top of mind.
All calculations are pure, transparent code - no black-box AI. Methodology is shown on every result.
Start free. Upgrade when the future matters.
Free answers today. Premium answers what happens next. You will know when you need it.
Everything you need to start
No card. No trial timer. This does not expire.
- Log every injection, weight and meal
- See how much medication is still working today
- Never miss a dose, with reminders
- Track side effects and energy
- Know if you are on track against the clinical trials
- Share a progress scorecard you are proud of
Premium looks forward
Most people upgrade around week six, when the questions change.
- See when you will reach your goal weight
- Make sure you are losing fat, not the muscle that keeps weight off
- Find out exactly why your weight loss slowed
- Know when you are ready, or not ready, to increase your dose
- Bring organized progress reports to your appointments
- Keep your complete treatment history forever
You do not need to decide now. Get today's answer, build the habit, and upgrade only when you want to know what happens next.
Everything you need to start is free
Free covers today: log every dose, watch your weight, see how much medication is still working. Premium tells you what happens next: when you will hit your goal, why progress slowed, and whether you are losing fat or muscle.
Start free, no card. Upgrade when you want the predictions.
Upgrade Calqulate Vitals to track Glp-1 dose, Metabolism & Heart age.
The free snapshot is genuinely free — run any engine once, nothing saved. One plan unlocks saved history, the trajectory engine, your next-lever protocol, and doctor-shareable reports.
“We don't just track GLP-1 weight loss — we solve the muscle-wasting problem, separating fat loss from muscle loss so you preserve your strength. And by innovating on the algorithm that times your dose, we help you find your dosing sweet spot: maximum fat loss, minimal side effects, and a body that looks 15 years younger.”
Billed monthly. Switch to yearly anytime.
- Make sure you are losing fat, not muscle. Up to 40% of GLP-1 weight loss can be muscle. Muscle is what keeps the weight off, so we watch it for you.
- Keep your complete treatment history forever. Change your phone, change your doctor, change your medication. Your full timeline follows you.
Everything in Free, plus unlock these with Calqulate Vitals:
- Watch your heart and diabetes risk fall over time
- See when you will reach your goal weight
- Know the single change that will help you most
- Save full check-ins and build a real history
- Download your full health report
- Know how today will feel before it happens
- Watch your progress week by week, and see plateaus coming
- Find out exactly why your weight loss slowed
- Know when you are ready, or not ready, to increase your dose
- Bring organized progress reports to your appointments
- Make sure you are losing fat, not the muscle that keeps weight off
- Track more than one medication at the same time
- Never run out of medication
- Check the protein in as many meals as you like
- See your best case, likely case and worst case
- Get a plan that adapts as your body changes
- Keep your complete treatment history forever
Create your account, then pay securely. Cancel anytime.
Educational decision-support - not medical advice. Cancel anytime.
Discover Your Body & Face Shape
Two of our most-loved tools. Hundreds of thousands of people use them to understand their physical traits and receive personalized lifestyle guidance.
Body Shape Calculator
Enter your bust, waist, and hip measurements to discover your body shape, such as hourglass, pear, apple, or rectangle.
- Identify your exact body type
- Get fitness tips for your shape
- Find flattering clothing styles
Face Shape Detector
Use precise facial measurements, including your forehead, cheekbones, jaw, and face length, to identify your exact face shape.
- Determine oval, round, square, heart, diamond, or oblong
- Get hairstyle recommendations
- Find the best glasses for your features
Every Aspect of Your Health, Covered
Eight specialized health categories help you find the calculator you need quickly.
Go Beyond Raw Numbers. A Decision Guide for Your Health.
Most health calculators stop at a result. Calqulate goes further. Every calculation comes with an explanation of what your result means, how it compares to healthy ranges, and what concrete steps you should take next.
You might want to optimize your fitness, manage a chronic condition, track weight loss, or understand your body. Calqulate turns raw data into real decisions.
Built on Trust. Designed for Understanding.
We built Calqulate because health tools should help people make better decisions, rather than overwhelming or misleading them.
Explore Health Visuals
Body shapes, face shapes, and BMI charts are easier to understand visually. Click any image to explore detailed guides.
We watched people lose forty pounds.
And lose their muscle with it.
Nobody warned them. Nobody was measuring it. They found out a year later, when the weight came back and would not leave again.
So we built Calqulate.
Not another weight app. The one thing the scale cannot do: tell you what you are actually losing, and whether you will still be here in a year.
Built to earn your trust, not just your subscription
We’re new, and we’d rather show you exactly how we work than post reviews we can’t back up.
Validated clinical models
Pooled Cohort Equations, Framingham & FINDRISC. Methodology shown on every result.
Private by design
Encrypted, backed up, and never sold. Export or delete anytime.
Your data is never lost
Durable saves, version history and a restore flow, the #1 thing other apps get wrong.
Cancel anytime
One click, no retention maze. Switch monthly ↔ yearly whenever you like.
Educational decision-support, not medical advice. Individual results vary.
Common questions about Calqulate
Everything you need to know about our calculators, your data, and the clinical models behind the numbers.
I already use MyFitnessPal. Why do I need this?
Generic trackers are designed just for counting calories. Calqulate is built specifically for people on GLP-1 medications for weight loss (Ozempic, Wegovy, Mounjaro). We monitor the unique side effects of these glucagon-like peptide-1 (GLP-1) drugs, things like rapid muscle loss, extreme drops in appetite, and metabolic changes, so you lose weight safely.
Which GLP-1 is best for weight loss?
The best GLP-1 for weight loss depends on you. Tirzepatide (Mounjaro, Zepbound) tends to drive the largest average loss, while semaglutide (Ozempic, Wegovy) is a proven all-rounder, and Rybelsus is the oral GLP-1 pill option. Whichever GLP-1 drug or shot you're on, what actually protects your results is tracking fat vs. muscle, not just the scale.
Compare the best GLP-1s for weight loss →How do I know if I am losing muscle instead of fat?
The standard bathroom scale lies to you. Up to 30% of weight lost on GLP-1s can be muscle. Our Body Composition Tracker uses clinically validated inputs to show you exactly how much fat you are burning versus muscle, so you don't end up 'skinny fat'.
Why do you track 'Heart Age' and Labs?
Insurance companies and doctors require proof that your medication is actually making you healthier to keep refilling it. By tracking your labs and your 'Heart Age' in our app, you have undeniable proof that your internal health is drastically improving.
What is the Founding Member Beta offer?
We just launched the GLP-1 suite! For our first 100 users, instead of a $9.99 monthly subscription, we are offering a one-time lifetime pass for just $49. No recurring fees, ever.
Is my medical data safe?
100% yes. We do not require an account for basic calculators, and for premium users, your data is never sold. You can export or permanently delete your health history with the click of a single button.
This is the last time you will wonder whether your medication is working.
Lose fat. Keep muscle. Stay healthy. Start with today's answer, free.
No card. The calculators are free forever.