Peptide & TRT Calculators
Six precision calculators handle the math behind any peptide, TRT, GLP-1, or HRT protocol: peptide reconstitution, TRT dose, GLP-1 dose, intranasal spray, split-dose, and a half-life visualizer. All six ship inside the Regimen app along with eight more specialty tools listed below. Free, no signup required. If you're comparing options, see our roundup of the best peptide tracker apps.
Six Precision Calculators
Peptide Reconstitution Calculator
Calculate exact syringe units for BPC-157, TB-500, HCG, and any peptide.
TRT Dose Calculator
Calculate TRT injection doses for testosterone cypionate, enanthate, and propionate in mL and units.
GLP-1 Dose Calculator
Calculate exact semaglutide and tirzepatide syringe doses.
Intranasal Peptide Calculator
Calculate spray doses for BPC-157, Selank, Semax, and NAD+ nasal sprays.
Split Dose Calculator
Divide your weekly GLP-1 or TRT dose into multiple injections for stable blood levels.
Half-Life Visualizer
See blood concentration curves for peptides, GLP-1 meds, and testosterone.
More Specialty Tools
Peptide Blend Calculator
Calculate doses for multi-peptide vials like BPC-157/TB-500 blends.
GLP-1 Titration Planner
Plan your Ozempic, Wegovy, Mounjaro, or Zepbound dose escalation schedule.
HCG Calculator
Convert HCG IU to insulin syringe units after reconstitution.
Testosterone Vial Calculator
How long will your vial last? Includes dead space waste and cost per week.
Medication Storage Calculator
When to discard opened Ozempic, Wegovy, testosterone, HCG, and peptides.
Free Testosterone Calculator
Calculate free and bioavailable testosterone from total T, SHBG, and albumin.
Low Testosterone Quiz
ADAM questionnaire — validated 10-question screening for low T symptoms.
TDEE Calculator
Calculate daily calorie needs with protein targets for weight management.
Get all these tools built into one app
Regimen includes every calculator above, plus smart reminders, dose logging, and progress tracking. Free for one compound.
- Built-in dose calculators
- Smart injection reminders
- Track progress over time
- Private, secure health data
