Free GLP-1 & peptide tools
Every calculator runs entirely in your browser — no signup, no account, nothing sent anywhere. Where a number has a clinical basis, the page links the FDA label or study it came from.
Dosing tools
Peptide dose calculator
Vial strength, bacteriostatic water and dose in; exact syringe units out. U-100 (all barrel sizes), U-40 and tuberculin.
Half-life chart
38 compounds: half-life, time to peak and clearance, every figure sourced.
Schedule tools
Next injection date
Any weekly or daily GLP-1: next due date, the labelled late window, and the day-switch rule.
Ozempic & Wegovy dates
Semaglutide's 7-day schedule, 5-day late window and 48-hour switch rule.
Mounjaro & Zepbound dates
Tirzepatide's 7-day schedule, 4-day late window and 72-hour switch rule.
Weight tools
Weight loss percentage
Your percentage lost against the 5% clinical benchmark and the GLP-1 trial averages.
Goal date estimate
Current weight, goal and weekly rate in; an honest straight-line date out.
BMI calculator
US or metric, with the CDC categories and the thresholds the GLP-1 labels reference.
The app does these continuously
Bo keeps your dose schedule, draws your estimated medication level from your logged shots, and tracks weight and goal progress automatically — with reminders before every dose.
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Educational information only. Bo is a tracking app, not a medical device, and nothing here is medical advice, a dosing recommendation, or a substitute for your prescriber. Half-lives are population averages from the sources cited on each row; individual clearance varies with body weight, kidney and liver function, and other medication.