Know your numbers before you book
Free, physician-reviewed calculators for the questions people actually ask — your BMI, your calories, your testosterone, your thyroid. Get the number, understand what it means, and see when it's worth a real visit.
Every calculator, one place
Pick a tool, enter a few numbers, and get a clear read — with a plain-English explainer from a physician. More are on the way.
BMI Calculator
Find your body mass index and see where it falls — plus what the number does and doesn't tell you about your health.
TDEE Calculator
Estimate the calories your body burns in a day — your total daily energy expenditure — so you can plan to lose, hold, or gain.
Calorie Deficit Calculator
See the daily calorie target for a safe, steady deficit — and roughly how fast the weight comes off at that pace.
Protein Intake Calculator
Find your daily protein target by weight and goal — and why it matters even more while you're losing weight on a GLP-1.
GLP-1 Dose Schedule
See the standard titration schedule for semaglutide and tirzepatide — how the dose steps up week by week, and why it's done slowly.
Weight-Loss Timeline Estimator
Enter a goal weight and see a realistic timeline to reach it — and what a GLP-1's typical 5–15% loss could look like for you.
Low Testosterone Calculator
Check your energy, sex drive, muscle, and mood against the symptoms of low testosterone — then see where you stand and what to do next.
Free Testosterone Calculator
Enter your total testosterone, SHBG, and albumin to estimate free and bioavailable testosterone — the numbers that track symptoms best.
ED Severity Score (SHIM)
The validated 5-question SHIM (IIEF-5) score for erectile dysfunction. See your severity band and what usually helps.
TSH Level Interpreter
Enter your TSH result and see whether it reads as normal, subclinical, or overt — and what usually comes next.
UTI Symptom Checker
Answer a few questions about your symptoms to see how likely a urinary tract infection is — and the red flags that mean get seen now.
BV vs. Yeast Checker
Discharge, odor, itch — the symptoms overlap. Answer a few questions to see whether it points more to BV or a yeast infection.
Tretinoin Strength Selector
Skin type, concern, and experience in — a sensible starting tretinoin strength out, plus how to ramp up without the peeling.
Water Intake Calculator
Estimate how much water you need per day from your weight and activity — and when "drink more water" actually matters for your health.
How these tools work
No. Every tool here is an educational estimate built on standard clinical formulas and validated questionnaires — it can help you understand a number or a symptom pattern, but it can't diagnose you. When something needs a clinician, we say so and point you to care.
Each calculator and its explainer are written and medically reviewed by a licensed physician, and dated so you know it's current. The math and reference ranges come from primary clinical sources, which we cite on every tool.
No. The calculators run entirely in your browser — the height, weight, or answers you enter are used to show your result and are never sent to Vyta.co or saved.
Built by a clinician. Reviewed by a clinician.
Every calculator uses standard clinical formulas and validated questionnaires, cites its sources, and is reviewed by a licensed physician. We're always clear about what a number can and can't tell you — and when to skip the math and get seen.
Numbers point one way?
Get care the other.
A licensed Vyta.co clinician can review your symptoms and send treatment to your pharmacy — often the same day. No subscriptions, no waiting room.