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GLP-1 dose cycle calculator: what day of my cycle am I on?
For people already prescribed GLP-1 medication. Weight Easy does not prescribe, sell or arrange medication. Your prescriber makes treatment and dose decisions.
By the Weight Easy Editorial Team ·
✓ Free to download
Quick answer: Day 1 is your injection day. Semaglutide (Ozempic, Wegovy) peaks 1 to 3 days after the shot and tirzepatide (Mounjaro, Zepbound) peaks within about 1 day. Levels then fall until your next dose, which is why appetite is lowest early in the week and hunger often returns on days 6 and 7.
Weekly injections
- Mounjaro (tirzepatide)
- Zepbound (tirzepatide)
- Ozempic (semaglutide)
- Wegovy (semaglutide)
- Generic semaglutide for diabetes (Obeda, Sematrinity, GLIPIQ)
- Generic semaglutide for weight (Noveltreat)
- Yurpeak (tirzepatide)
- Compounded semaglutide
- Compounded tirzepatide
- Trulicity (dulaglutide)
- Bydureon BCise (exenatide extended-release)
Daily injections
- Saxenda (liraglutide)
- Victoza or generic liraglutide
- Byetta (exenatide)
Daily tablets
- Wegovy pill (oral semaglutide)
- Rybelsus 1.5, 4 or 9 mg, or Ozempic tablets (oral semaglutide)
- Rybelsus 3, 7 or 14 mg (oral semaglutide)
- Foundayo (orforglipron)
Earlier weeks are assumed to follow the standard 4-week steps.
Fill in the form to see your result
Still needed: your medication, your dose, the date of your last injection, weeks on this dose.
Works with: Mounjaro, Zepbound, Ozempic, Wegovy, Wegovy pill, Rybelsus, Ozempic tablets, Saxenda, Victoza, Trulicity, Bydureon BCise, Byetta, Foundayo, Yurpeak, Obeda, Noveltreat, Semaglyn, Sematrinity, GLIPIQ, compounded semaglutide, compounded tirzepatide.
Free to download
Let Weight Easy track your cycle for you
Log a dose in two taps and the app keeps your cycle day, level chart and reminders up to date every week. Weight Easy's AI coach knows it's day 3 and why you feel the way you do.
- Your live level chart after every logged dose
- Shot-day reminders on your schedule
- Meals that change with your cycle day
- Weight Easy's AI coach knows your dose, cycle day and symptoms
Free to download. Subscription for full features, with a 7-day free trial on the yearly plan. For people already prescribed GLP-1 medicine. Weight Easy does not prescribe, sell or arrange medicine. Follow the treatment instructions from your prescribing clinician.
Read the complete guide
The calculator stays free on this page. Its longer explanatory article, medicine-specific FAQ and cited sources live in the Weight Easy blog, alongside the other health and tracking guides.
Read the guide and FAQ →Related guides
- How to Track Your GLP-1 Dose Cycle Without Missing Key PatternsLearn how to track your GLP-1 dose cycle, appetite changes, side effects, and weekly routines so you can spot patterns early and stay consistent.
- Mounjaro Titration Schedule Explained: Doses, Timeline, and TipsUnderstand the dosing schedule for Mounjaro, including timelines and tips to support adherence during treatment.
- Semaglutide vs Tirzepatide: Which Works Better for Weight Loss?Compare semaglutide and tirzepatide for weight loss, including the SURMOUNT-5 head-to-head trial, studied doses, side effects and treatment considerations.
- A Zepbound Shot Day Checklist You Can Actually Repeat Every WeekUse a repeatable Zepbound shot day checklist to stay organized, reduce decision fatigue, and make weekly injections easier to manage.
Sources and limits
- Ozempic, Wegovy, Mounjaro and Zepbound prescribing information (half-life and time to peak).
- Level curve: one-compartment model with first-order absorption, relative units only.
This tool is for education. It does not diagnose, prescribe or change a dose. Always follow your prescriber and the leaflet that came with your medication.