What is a typical TRT dose?

Typical TRT doses range from 100-200mg per week, often split into 2 injections for more stable blood levels. Your doctor will determine the appropriate dose based on your blood work.

What's the difference between Cypionate and Enanthate?

Both are long-acting testosterone esters with similar half-lives (8-10 days). Cypionate is more common in the US, while Enanthate is more common internationally. They can be used interchangeably.

How do I convert insulin units to mL?

U-100 insulin syringes have 100 units per 1mL. So 50 units = 0.5mL, 25 units = 0.25mL, etc.

Peptides+ Chart

TRT & HRT Dosage Calculator

Calculate testosterone and hormone replacement therapy dosages. Convert mg to mL and insulin syringe units for various oil-based concentrations.

TRT/HRT

Calculate testosterone and hormone replacement therapy dosages. Convert mg to mL and insulin syringe units for various oil-based concentrations.

ConcentrationCheck your vial label for concentration

Prescribed DoseYour prescribed dose per injection

Injection FrequencyHow often you inject

This calculator is for educational purposes. Testosterone is a controlled substance requiring a prescription. Always follow your healthcare provider's instructions.

Visual Syringe Guide

Use this interactive syringe visualization to verify your calculated dose. Enter the volume from your calculation above to see exactly where the plunger should land.

Syringe Configuration

Desired Volume (mL)

Quick Select

0.0

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0.5

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1.0

Administration Note

For a 0.50 mL dose, pull the plunger back until the top ring of the black stopper aligns with the corresponding mark.

Volume Match0.50 mL

Important Disclaimer

This calculator is for educational purposes. Testosterone is a controlled substance requiring a prescription. Always follow your healthcare provider's instructions.

About This Calculator

Testosterone Replacement Therapy (TRT) and Hormone Replacement Therapy (HRT) require precise dosing. This calculator helps convert your prescribed milligram dose into the exact volume to draw, including insulin syringe unit conversion for those using U-100 syringes.

How It Works

Select your testosterone concentration (found on your vial label), enter your prescribed dose, and choose your injection frequency. The calculator provides the exact volume per injection and converts to insulin syringe units.

Frequently Asked Questions

Insulin syringes (29-31 gauge) are smaller and less painful than traditional intramuscular needles. They work well for subcutaneous or shallow intramuscular injections with volumes under 0.5mL.

Clinical Review

Dr. Igor I. Bussel, MD

Board-Certified Ophthalmologist

Dr. Igor I. Bussel is a board-certified ophthalmologist and fellowship-trained surgeon affiliated with the University of California, Irvine (UCI), the Gavin Herbert Eye Institute, and the UCI School of Medicine.

Last Updated: 2026-01-06

Sources & Guidelines

Bhasin S, et al. "Testosterone Therapy in Men With Hypogonadism." Journal of Clinical Endocrinology & Metabolism, 2018.
American Urological Association. "Evaluation and Management of Testosterone Deficiency." 2018.

Medically Reviewed

Evidence-Based

Updated 2026-01-06

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References

Last updated: 2026-01-06