Free, evidence-based calculators and tools built specifically for people using GLP-1 medications like semaglutide (Wegovy, Ozempic) and tirzepatide (Mounjaro, Zepbound).
Every tool is designed with GLP-1 users in mind — from understanding your calorie needs on a suppressed appetite, to tracking your medication supply so you never run out.
- BMI Calculator — Check your BMI and GLP-1 eligibility
- BMR / TDEE / Calorie Deficit Calculator — Find your daily calorie targets using the Mifflin-St Jeor equation
- Protein Calculator — Critical for preserving muscle on semaglutide
- Water Intake Calculator — Hydration targets adjusted for GLP-1 constipation risk
- GLP-1 Supply Tracker — Track your pens, doses remaining, and refill dates
All calculators use validated clinical formulas with sources cited. Results are estimates — always consult your healthcare provider before making medical decisions.
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Medical disclaimer: Content on OnSemaglutide.com is for informational purposes only and is not medical advice. Talk with a licensed healthcare provider before starting, stopping or changing any medication. Read the full disclaimer.