FHIR Observation Unit Checker
Checks the UCUM unit, system and plausible range of an Observation value and converts glucose units.
Clinical safety notice: Zero real patient data (PHI/PII) may be entered into this browser utility. Use synthetic test payloads only. Local-first deterministic processing; nothing leaves your browser.
How it works
Standard: HL7 FHIR R4 Observation with UCUM (bundled subset)
Formula: Glucose: mmol/L = mg/dL / 18.016 and mg/dL = mmol/L x 18.016
Checks: valueQuantity.system is UCUM; unit and code agree and are in the subset (mg/dL, mmol/L, mm[Hg], Cel, kg, cm); value in plausible range
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.