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Weight Loss Medication Calculators

Project your expected weight loss on GLP-1 medications like Ozempic, Mounjaro, Wegovy, and Zepbound. All projections based on published clinical trial data from STEP and SURMOUNT studies.

11 free tools
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Antidepressant Weight Gain Calculator
Estimate potential weight and body fat gain from antidepressants based on medication type, dose, and treatment duration.
Calculate Impact →
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Ozempic Pen Click Calculator
Calculate accurate Ozempic (semaglutide) dosing, check safety alerts, and track injection schedules with our comprehensive tool.
Check Dosing →
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Ozempic Weight Loss Calculator
Estimate your fat loss and BMI reduction while taking semaglutide (Ozempic/Wegovy).
Estimate Fat Loss →
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Wegovy Weight Loss Calculator
Project your expected weight loss on Wegovy (semaglutide 2.4mg) based on STEP clinical trial data. Supports injectable and oral pill forms.
Project Weight Loss →
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Oral Wegovy Weight Loss Calculator
Project your expected weight loss on oral Wegovy (semaglutide 25mg pill) based on OASIS 1 clinical trial data. FDA-approved December 2025.
Project Weight Loss →
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Mounjaro Weight Loss Calculator
Estimate your potential weight loss on Mounjaro (tirzepatide) based on SURMOUNT clinical trial data, dose, and lifestyle factors.
Estimate Weight Loss →
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Zepbound Weight Loss Calculator
Project your expected weight loss on Zepbound (tirzepatide) based on SURMOUNT clinical trial data. Personalized timeline by dose, starting weight, and treatment duration.
Project Weight Loss →
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CagriSema Weight Loss Calculator
Estimate your potential weight loss on CagriSema (cagrilintide + semaglutide) based on REDEFINE 1 trial data. 20.4% mean weight loss at 68 weeks — the newest dual-agonist combination.
Estimate Weight Loss →
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GLP-1 Comparison Calculator
Compare projected weight loss on Ozempic, Mounjaro, and Zepbound side by side. Based on STEP and SURMOUNT clinical trial data.
Compare Medications →
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GLP-1 Cost Calculator
Compare costs of GLP-1 medications and estimate treatment expenses with insurance and savings options.
Compare Costs →
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Ozempic Face Risk Calculator
Estimate your risk of facial volume loss from GLP-1 weight loss medications based on age, BMI, rate of weight loss, and other clinical factors.
Assess Risk →

Understanding GLP-1 Weight Loss Projections

GLP-1 receptor agonists represent a breakthrough in obesity treatment, with clinical trials showing 15-25% total body weight loss depending on the medication and dose. Our calculators model these outcomes using data from the largest published trials.

How These Calculators Work

Each calculator uses a logarithmic weight loss curve fitted to trial-reported outcomes at specific time points. This captures the real pattern of GLP-1 weight loss: rapid initial loss that gradually plateaus over 12-18 months. Your projection accounts for starting weight, dose, and treatment duration.

Key Differences Between Medications

  • Ozempic (semaglutide 1mg) — Originally approved for type 2 diabetes. Average weight loss ~12-15% over 68 weeks in STEP trials
  • Wegovy (semaglutide 2.4mg) — Higher-dose semaglutide specifically for obesity. ~15-17% weight loss in STEP trials
  • Mounjaro/Zepbound (tirzepatide) — Dual GIP/GLP-1 agonist. ~20-25% weight loss in SURMOUNT trials, the most effective option to date

Important Caveats

Individual results vary significantly from trial averages. Factors like diet, exercise, starting BMI, and genetics all influence outcomes. These projections are estimates based on population-level data, not guarantees. Always work with your prescribing physician to set realistic expectations.

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