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, with reminders before every dose. The app does not calculate doses.
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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.