Testosterone Dose Calculator

Use this calculator to determine the precise volume of testosterone solution you need to inject based on your desired weekly dose, vial concentration, and injection frequency. This tool helps convert milligrams (mg) into milliliters (mL) for accurate dosing.

Desired Weekly Testosterone Dose (mg):

Testosterone Vial Concentration (mg/mL):

Injections Per Week:

function calculateTestosteroneDose() { var desiredWeeklyDoseMg = parseFloat(document.getElementById("desiredWeeklyDoseMg").value); var vialConcentrationMgMl = parseFloat(document.getElementById("vialConcentrationMgMl").value); var injectionFrequencyPerWeek = parseFloat(document.getElementById("injectionFrequencyPerWeek").value); var resultDiv = document.getElementById("result"); if (isNaN(desiredWeeklyDoseMg) || isNaN(vialConcentrationMgMl) || isNaN(injectionFrequencyPerWeek) || desiredWeeklyDoseMg <= 0 || vialConcentrationMgMl <= 0 || injectionFrequencyPerWeek <= 0) { resultDiv.innerHTML = "Please enter valid positive numbers for all fields."; return; } var totalWeeklyVolumeMl = desiredWeeklyDoseMg / vialConcentrationMgMl; var volumePerInjectionMl = totalWeeklyVolumeMl / injectionFrequencyPerWeek; resultDiv.innerHTML = "

Calculation Results:

" + "Total Weekly Volume: " + totalWeeklyVolumeMl.toFixed(2) + " mL" + "Volume Per Injection: " + volumePerInjectionMl.toFixed(2) + " mL"; } .calculator-container { background-color: #f9f9f9; border: 1px solid #ddd; padding: 20px; border-radius: 8px; max-width: 600px; margin: 20px auto; font-family: Arial, sans-serif; } .calculator-container h2 { color: #333; text-align: center; margin-bottom: 20px; } .calculator-container p { color: #555; line-height: 1.6; } .calc-input-group { margin-bottom: 15px; } .calc-input-group label { display: block; margin-bottom: 5px; color: #333; font-weight: bold; } .calc-input-group input[type="number"] { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } .calculator-container button { background-color: #007bff; color: white; padding: 12px 20px; border: none; border-radius: 4px; cursor: pointer; font-size: 16px; width: 100%; display: block; margin-top: 20px; } .calculator-container button:hover { background-color: #0056b3; } .calc-result { margin-top: 25px; padding: 15px; border: 1px solid #e0e0e0; border-radius: 4px; background-color: #eaf6ff; } .calc-result h3 { color: #007bff; margin-top: 0; margin-bottom: 10px; } .calc-result p { margin-bottom: 5px; color: #333; } .calc-result p strong { color: #0056b3; } .calc-result .error { color: #dc3545; font-weight: bold; }

Understanding Testosterone Dosing and Your Calculator

Testosterone Replacement Therapy (TRT) is a common treatment for men with clinically low testosterone levels (hypogonadism). Accurate dosing is crucial for achieving therapeutic benefits while minimizing potential side effects. This calculator is designed to help you convert your prescribed testosterone dose in milligrams (mg) into the precise volume in milliliters (mL) you need to inject, based on the concentration of your testosterone vial and your injection frequency.

Why Accurate Dosing Matters

Testosterone is a powerful hormone, and maintaining stable, physiological levels is key. Too low a dose might not alleviate symptoms, while too high a dose can lead to side effects such as erythrocytosis (increased red blood cell count), acne, hair loss, and suppression of natural testosterone production. Your doctor will typically prescribe a weekly dose in milligrams (e.g., 100 mg/week, 150 mg/week) to aim for a specific target range of testosterone in your blood.

Key Factors in Testosterone Dosing

Desired Weekly Testosterone Dose (mg): This is the total amount of testosterone your doctor has prescribed for you to administer over a week. It's usually determined based on your blood test results, symptoms, and individual response to therapy.
Testosterone Vial Concentration (mg/mL): Testosterone solutions come in various concentrations. Common concentrations include 100 mg/mL, 200 mg/mL, or even 250 mg/mL. This value tells you how many milligrams of testosterone are present in each milliliter of the solution. For example, a 200 mg/mL vial means every 1 mL contains 200 mg of testosterone.
Injections Per Week: The frequency of your injections can vary. Some individuals inject once a week, others twice a week (e.g., Monday and Thursday), or even more frequently. More frequent injections can help maintain more stable blood levels and reduce peaks and troughs.

How the Calculator Works

The calculator performs two simple but essential steps:

Calculates Total Weekly Volume (mL): It divides your desired weekly dose (mg) by the vial concentration (mg/mL) to determine the total volume in milliliters you need to inject over the course of a week.
Formula: Total Weekly Volume (mL) = Desired Weekly Dose (mg) / Vial Concentration (mg/mL)
Calculates Volume Per Injection (mL): It then takes the total weekly volume and divides it by your chosen number of injections per week to give you the exact volume to draw into your syringe for each individual injection.
Formula: Volume Per Injection (mL) = Total Weekly Volume (mL) / Injections Per Week

Example Scenario:

Let's say your doctor prescribes a weekly dose of 120 mg of testosterone. You have a vial with a concentration of 200 mg/mL, and you plan to inject twice a week.

Desired Weekly Testosterone Dose: 120 mg
Testosterone Vial Concentration: 200 mg/mL
Injections Per Week: 2

Using the calculator:

Total Weekly Volume: 120 mg / 200 mg/mL = 0.60 mL
Volume Per Injection: 0.60 mL / 2 injections = 0.30 mL per injection

This means you would inject 0.30 mL of testosterone solution twice a week to achieve your prescribed 120 mg weekly dose.

Important Disclaimer:

This calculator is a tool for informational purposes only and should not replace professional medical advice. Always follow the specific instructions and dosage prescribed by your healthcare provider. Incorrect dosing can have significant health implications. If you have any questions or concerns about your testosterone therapy, consult with your doctor or a qualified medical professional.