Thyroid Risk Calculator

American Thyroid Association (ATA) Clinical Standards

The thyroid gland regulates systemic basal metabolic rate through the synthesis of triiodothyronine (T3) and thyroxine (T4) controlled by pituitary Thyroid-Stimulating Hormone (TSH):

• **

• Hypothyroidism**:

• Mechanisms: Autoimmune destruction of follicular cells by anti-TPO antibodies, slowing basal metabolism.

• Symptoms: Chronic fatigue, unexplained weight gain, cold intolerance, dry coarse skin, brittle hair/loss, constipation, brain fog, bradycardia (< 60 bpm).

• Lab Signature: Elevated TSH with Low or Normal Free T

4.

• **

• Hyperthyroidism**:

• Mechanisms: Thyroid-stimulating immunoglobulins (TSI) stimulate TSH receptors, producing excessive thyroid hormones.

• Symptoms: Rapid unintentional weight loss, heat intolerance, heavy sweating, resting tachycardia (> 90 bpm), palpitations, hand tremors, anxiety, insomnia.

• Lab Signature: Suppressed TSH with Elevated Free T4 and Free T

3.

How to Use This Calculator

Enter your Biological Sex — choose from Female (5–8x higher incidence of thyroid disease), Male, Fatigue & Energy Levels — choose from Normal daily energy, Chronic fatigue, sluggishness, morning exhaustion (Hypo symptom), Restless, nervous energy, severe insomnia (Hyper symptom), Unexplained Weight Changes — choose from Stable weight / normal fluctuations, Unexplained weight gain / difficulty losing weight (Hypo symptom), Unintentional rapid weight loss despite increased appetite (Hyper symptom), Temperature Sensitivity — choose from Normal temperature tolerance, Cold intolerance (hands/feet always freezing, wear extra layers) (Hypo), Heat intolerance (excessive sweating, always overheating) (Hyper), Heart Rate & Physical Symptoms — choose from No unusual symptoms, Dry skin, brittle nails, thinning hair, constipation, brain fog (Hypo), Heart palpitations, rapid resting pulse (>90 bpm), hand tremors (Hyper), Family History of Autoimmune Thyroid Disease (Hashimoto's or Graves') — choose from Yes (Mother, father, sibling, or child with thyroid disorder), No known family history, and Clinical Symptom Benchmark — choose from Custom Symptom Profile, High Risk Hypothyroidism (Fatigue / Weight Gain / Cold / Hair Loss / Fam History), High Risk Hyperthyroidism (Weight Loss / Heat / Palpitations / Tremors). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Formula Reference: Thyroid Risk Calculator

Input variables:

biologicalSexSelect — Biological Sex

fatigueEnergySelect — Fatigue & Energy Levels

weightChangeSelect — Unexplained Weight Changes

temperatureSensitivitySelect — Temperature Sensitivity

heartRateMoodSelect — Heart Rate & Physical Symptoms

Computed outputs:

thyroidDisorderRiskCategory — Thyroid Risk Classification

hypothyroidismScorePoints — Hypothyroidism Risk Score

hyperthyroidismScorePoints — Hyperthyroidism Risk Score

recommendedBloodTests — Recommended ATA Laboratory Panel

Reference ranges follow American Thyroid Association (ATA) clinical guidelines and standard endocrinology symptom scoring frameworks.

Worked Example

A 38-year-old woman with persistent fatigue, unexplained 10 lb weight gain, and cold hands scores 9/10 for hypothyroidism; blood tests confirm an elevated TSH of 7.8 mIU/L and high anti-TPO antibodies, diagnosing Hashimoto's.

Understanding Your Result

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