Wegovy Progress Calculator
Use this calculator to estimate your timeline, BMI change, dose phase distribution, and approximate medication cost based on your inputs.
What this Wegovy calculator helps you estimate
This Wegovy calculator is designed for planning and education. It estimates how long it may take to move from your current weight to a target weight based on a steady weekly percentage reduction. It also estimates BMI changes, a projected date, and a rough cost forecast.
It does not replace medical advice. Real-world progress can vary substantially based on dose tolerance, nutrition, sleep, physical activity, stress, metabolic conditions, and whether your prescriber adjusts dosing speed.
Standard Wegovy dose escalation overview
Wegovy (semaglutide) is commonly titrated gradually to reduce gastrointestinal side effects. A common label-based schedule looks like this:
| Weeks | Weekly Dose | Purpose |
|---|---|---|
| 1-4 | 0.25 mg | Initiation and tolerance building |
| 5-8 | 0.5 mg | Early appetite and satiety support |
| 9-12 | 1.0 mg | Continuation of response |
| 13-16 | 1.7 mg | Intermediate therapeutic phase |
| 17+ | 2.4 mg | Maintenance target dose (for many patients) |
Some people remain longer at lower doses if side effects are significant. Always follow your clinician’s exact instructions.
How the math works
1) Time-to-goal estimate
The calculator uses a compounding model where body weight decreases by a percentage each week. In simplified form:
Future Weight = Start Weight × (1 − weeklyRate)^weeks.
Solving for weeks gives an estimated timeline to your goal.
2) BMI estimate
For U.S. units, BMI is calculated as: weight(lb) ÷ height(in)^2 × 703.
This provides a basic screening metric, not a complete picture of health.
3) Cost estimate
Total medication cost is estimated from timeline in months multiplied by your monthly cost input. It does not include provider visits, labs, copays, nutrition counseling, or lifestyle program costs.
How to use this in real life
- Set realistic goals: Focus on trend direction and adherence rather than perfect weekly outcomes.
- Use trend data: Daily scale values fluctuate; weekly averages are usually more informative.
- Track side effects: Nausea, constipation, and appetite changes can affect pace and dose escalation.
- Plan plateaus: Weight loss often slows over time, which is normal and expected.
- Recalculate monthly: Update your assumptions as your body weight and response change.
Important limitations
Any online Wegovy weight loss estimator is a simplified model. It cannot account for:
- Medication access interruptions or insurance prior authorization delays
- Dose holds, missed doses, or side-effect-related schedule changes
- Differences in lean mass vs fat mass changes
- Medical conditions such as hypothyroidism, PCOS, diabetes, or sleep disorders
- Behavioral and environmental factors (stress, travel, sleep, food environment)
Wegovy calculator FAQ
Can this predict my exact weight loss?
No. It provides a planning estimate, not a guarantee.
Should I use a higher weekly loss rate to get a faster result?
Faster is not always better. Aggressive assumptions can produce unrealistic timelines. Use a conservative rate and update as you gather your own data.
Is this a medical recommendation tool?
No. This page is educational. Medication decisions should be made with your prescribing clinician.