Thyroid health calculators
Ratio-based views of your thyroid labs — conversion, axis balance, and the numbers behind the numbers. Free, no account needed.
Thyroid Ratio Calculator
Three ratio views of your thyroid labs in one page: FT3/rT3, FT3/FT4, and Jostel's TSH Index.
Numbers are a start — symptoms tell the fuller story.
Our free 3-minute health assessment maps your symptoms to possible root cause patterns and sends you a personalized AI report.
Take the free health assessment →These tools are part of the Brevlix patient acquisition system
Free calculators and assessments attract patients who are already researching their symptoms. Brevlix turns that same pattern into a system for your practice: an AI health assessment on your website that screens patients, captures their details, and sends them a personalized report — before the first appointment.
Patients come to you pre-informed
Every assessment produces a structured archetype report — you see the patient's symptom patterns before you meet them.
Your branding, your website
Embed with one script tag. Colors, logo, and booking link are yours — patients never leave your site.
Live in 5 minutes
12 pre-built clinical assessments. Pick a topic, customize, embed. No per-assessment fees.