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TRT and Peptide Dosage Calculators —
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InjectBuddy performs standard volume and ratio calculations for TRT, peptide reconstitution, BMI, and free testosterone estimates. Enter your numbers, get your result instantly.

TRT

Testosterone Dosage Calculator

Vial strength · weekly dose · injection frequency

Calculate injection volume for testosterone protocols, including every-N-days, weekly, and mL-to-mg modes.

 PEP

Peptide Reconstitution Calculator

Bacteriostatic water · vial concentration · dose

Work out vial concentration, mL per injection, and U-100 syringe units after reconstitution.

 BMI

BMI Calculator

Metric and imperial body mass index

Estimate body mass index using either kg and cm or lb and ft/in inputs.

 FAI

Free Testosterone Index Calculator

Total testosterone · SHBG · Free Androgen Index

Calculate the Free Androgen Index (FAI) from total testosterone and SHBG lab values.

Built by Pouroa Frew — developer, not a medical professional. InjectBuddy performs standard volume and ratio calculations based on your inputs. These calculators do not constitute medical advice — always verify dosing with your prescribing doctor or pharmacist.

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