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Free, evidence-based tools for men’s hormone health.

Get clear on your testosterone, before you decide anything.

Free tools turn lab numbers and symptoms into plain answers. Each one runs on published clinical methods, not marketing. Your lab values never leave your browser.

Open the free testosterone calculator

The tools

Free, fast, private. Pick the question on your mind. Every tool runs in your browser, builds on published clinical methods, and never pretends a quiz can replace a blood test. 4 are live now; the rest are in build.

01 Free & Bioavailable Testosterone Calculator: Is your “normal” testosterone actually normal? See the active free fraction most lab reports leave out, using the clinical Vermeulen equation. Available 2 min 02 Low-T Symptom Screener (ADAM): Low testosterone, or something else? Ten validated ADAM questions that flag whether your symptoms are worth a blood test, and which conditions they overlap with. Available 2 min 09 Testosterone Test Pre-Check: Should you test right now? A quick read on your symptoms, the reversible factors that mimic low T, and how to time the test so the result is valid. Available 30 sec 10 Testosterone Habit Checker: Does it move your testosterone? Tick your habits and see, with the evidence, what is raising, lowering, or doing nothing to your testosterone. Available 1 min

03 “Reversible or not?” Self-Assessment: Could your low number be reversible? Weighs the lifestyle and medication factors that suppress testosterone before any prescription. Coming soon 2 min

04 Testosterone-by-Age Plotter: Is your level normal for your age? See where your result sits against age-banded reference ranges for men in their 20s through 60s. Coming soon 1 min

05 Lab-Pattern Interpreter: What is actually causing it? Reads your testosterone, LH and FSH together to point to a testicular or pituitary cause, in plain words. Coming soon 2 min

06 Home-Kit Accuracy Demonstrator: Can you trust a home test kit? Shows how a 14 to 19% test error can swing a result across the low line, and why lab-grade LC-MS/MS matters. Coming soon 1 min

07 “What should I do next?” Decision Guide: Not sure what to do next? An honest guide that routes you to testing, lifestyle, a clinician, or treatment, including “this probably isn’t low T.” Coming soon 2 min

08 Enclomiphene vs TRT vs Lifestyle Trade-off: Enclomiphene, TRT, or lifestyle? Compares fertility impact, mechanism and monitoring so you can weigh them against your goals. Coming soon 3 min

How these are built

We use validated clinical instruments where they exist: the Vermeulen equation for free testosterone, the ADAM questionnaire for symptoms. We also show their limits. A symptom screener flags a concern; it cannot confirm one. Confirmation needs a lab-grade test and a clinician. We lead with that honesty instead of burying it.