Free · No sign-up · Based on clinical data

Every calculator you need for your GLP-1 journey

From weight loss timelines to monthly costs and protein needs — free tools built on real clinical trial data from STEP and SURMOUNT trials.

12
Free calculators
2
Medications covered
4,200+
Calculations today
Based on Phase 3 clinical trials Covers semaglutide & tirzepatide No account required Updated April 2026 Not medical advice — always consult your provider

Featured tool

Weight Loss
GLP-1 Weight Loss
Timeline Calculator
Enter your current weight and medication to see your projected weight loss month by month — 3, 6, 12, and 24 months out. Based on STEP and SURMOUNT Phase 3 data.
Semaglutide Tirzepatide Goal weight Lifestyle factors
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Weight loss & body

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Weight Loss
Weight Loss Timeline Calculator
Project your weight loss month by month on sema or tirzepatide. Includes goal date estimator.
Most popular
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Eligibility
GLP-1 Eligibility & BMI Calculator
See if you meet FDA criteria for GLP-1 prescriptions based on BMI and comorbidities.
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Body Composition
Body Fat % Calculator
Track composition changes beyond the scale using Navy Method, BMI method, or measurements.
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Cost & Coverage
GLP-1 Monthly Cost Calculator
Compare real monthly costs across Wegovy, Zepbound, and compounded alternatives.
New
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Coverage
Insurance Coverage Estimator
Estimate your out-of-pocket costs based on plan type, diagnosis, and BMI threshold.
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Cost
Compounded vs. Branded Savings
See exactly how much you'd save switching to compounded semaglutide or tirzepatide.

Dosage & medication

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Dosage
Semaglutide Dose Schedule
Track your titration plan week by week. See when you'll reach maintenance dose.
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Dosage
Tirzepatide Dose Schedule
Mounjaro and Zepbound titration schedule with dose dates and injection reminders.
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Planning
Total Treatment Cost Calculator
Calculate total cost over 12 or 24 months including dose increases and refills.

Nutrition & fitness

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Nutrition
GLP-1 Protein Calculator
Daily protein targets to preserve muscle mass during GLP-1-driven weight loss.
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Nutrition
Calorie Deficit Calculator
Find your TDEE and optimal daily calories to complement your GLP-1 treatment.
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Nutrition
Macro Calculator for GLP-1 Users
Optimized macronutrient targets accounting for reduced appetite and muscle preservation goals.

How our calculators work

01
Built on clinical trial data
Every projection uses published data from STEP 1 (semaglutide) and SURMOUNT-1 (tirzepatide) Phase 3 trials — the same studies used for FDA approval.
02
Personalized to your inputs
We adjust projections based on your dose speed, diet approach, and goal weight — not just population averages.
03
Always free, no sign-up
Every tool on GLPcalcs is free to use with no account required. We don't store your health data.