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An independent source, not funded or influenced by any clinic or pharmaceutical company.An independent source, not funded or influenced by any clinic or pharmaceutical company.An independent source, not funded or influenced by any clinic or pharmaceutical company.An independent source, not funded or influenced by any clinic or pharmaceutical company.
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The tools desk

Every result needs context.

14 free, educational tools built around the numbers that actually come up on TRT: lab results, prescribed doses, symptom screening and monitoring over time. Each tool names its method and sources on its own page. None of them diagnose a condition or recommend a treatment.

01

Free & bioavailable testosterone calculator

Estimate free and bioavailable testosterone from lab inputs.

Total testosteroneSHBGAlbumin
02

ADAM questionnaire

Prepare for a conversation about symptoms.

10 yes/no questions2 minutes
03

Dose & syringe converter

Convert an existing prescription into a draw volume.

Prescribed doseVial strengthSyringe size
04

Hematocrit tracker

Keep dated hematocrit and hemoglobin readings together.

DateHematocrit %Hemoglobin g/dL
05

Half-life simulator

Compare illustrative dosing patterns over time.

EsterIntervalRelative dose
06

Testosterone unit converter

Convert a testosterone result between ng/dL and nmol/L.

Total testosteroneEither unit
07

Testosterone to estradiol ratio calculator

See how your total testosterone compares to estradiol.

Total testosteroneEstradiol
08

Vial supply tracker

See how many doses and days are left in a vial.

Vial sizeConcentrationDose
09

Lab draw timing helper

See where you are between injections before a blood draw.

Last injection dateEsterInterval
10

PSA tracker

Keep dated PSA readings together for your next review.

DatePSA ng/mL
11

STOP-BANG sleep apnea screener

Screen for obstructive sleep apnea risk, a common TRT consideration.

8 yes/no questions90 seconds
12

Time-to-steady-state calculator

See how long a dosing schedule takes to reach steady state.

EsterInterval
13

BMI calculator

Calculate body mass index from height and weight.

HeightWeight
14

hCG reconstitution calculator

Work out concentration and draw volume when mixing hCG.

Vial size (IU)Diluent addedDesired dose
For education only. These tools do not diagnose conditions, prescribe treatment or replace a licensed clinician. See our editorial policyfor how each one was built.