Calculated TSH
2.50
mIU/L
Reference Range
0.40 - 4.50
Non-pregnant adult
Severity Flag
Routine review
Low symptom burden
Interpretation Summary
Clinical note: TSH is inside the selected reference interval.
Free T4 context: Free T4 not entered.
Medication context: Because therapy is not selected, abnormal results may need diagnostic confirmation.
Age note: Adult reference interpretation is applied.
Calculator Inputs
Result Details
| Metric | Value |
|---|---|
| TSH | 2.50 mIU/L |
| Selected reference range | 0.40 - 4.50 mIU/L |
| Interpretation | Within reference range |
| Severity | Routine review |
| Normalized index | 0.51 |
| Distance below range | 0.00 mIU/L |
| Distance above range | 0.00 mIU/L |
| Percent from midpoint | 2.04% |
| Symptom band | Low symptom burden |
| Population setting | Non-pregnant adult |
This tool supports screening discussion only. It does not diagnose disease or replace clinician review, repeat testing, imaging, antibody workup, or treatment decisions.
Formula Used
Primary range check: Compare measured TSH with the active reference interval.
Normalized index: (TSH - range low) / (range high - range low)
Distance outside range: below-range distance equals range low - TSH; above-range distance equals TSH - range high.
Context logic: Free T4, pregnancy trimester, medication status, and symptom score refine the screening interpretation shown in the summary.
How to Use This Calculator
- Enter the current TSH result in mIU/L.
- Add free T4 if your lab report includes it.
- Choose the correct population setting, especially during pregnancy.
- Adjust the custom TSH interval if your laboratory uses different limits.
- Enter a simple symptom score from 0 to 8.
- Submit the form to view the summary above the form.
- Use CSV or PDF export when you need a portable report.
Example Data Table
| Case | TSH | Free T4 | Setting | Likely Screening Pattern |
|---|---|---|---|---|
| A | 2.10 | 1.20 | Non-pregnant adult | Within reference range |
| B | 6.80 | 1.10 | Non-pregnant adult | Possible subclinical hypothyroid pattern |
| C | 12.40 | 0.60 | Non-pregnant adult | Possible overt hypothyroid pattern |
| D | 0.07 | 2.10 | Non-pregnant adult | Possible overt hyperthyroid pattern |
| E | 3.20 | 1.00 | Pregnancy - First trimester | Above trimester-specific range |