// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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sci.oxygen-saturation-pulse-oximetry Calculator
Calculates SpO₂ from the ratio R = (AC/DC)_red/(AC/DC)_IR using the Beer-Lambert principle in pulse oximetry. Normal SpO₂ = 95–100% — below 90% requires oxygen therapy; below 80% is a medical emergency. Pulse oximetry overestimates SpO₂ in carbon monoxide poisoning because COHb absorbs identically to OxyHb at 660 nm.
Inputs
R Ratio
Reference formula or conversion factor shown for context.
Results
SpO₂ estimated (%)
The value at the specified point or condition.
clinical status
Current state of the system, process, or metric — typically pass/fail, healthy/warning/critical, or a descriptive classification.
SpO₂ ≈ 110 − 25·R (empirical calibration)
The proportional relationship between two quantities.
R = (AC660/DC660)/(AC940/DC940)
Reference formula or conversion factor shown for context.
accuracy range
The fraction of predictions or measurements that are correct. High accuracy is only meaningful when the class distribution is balanced.