Health

Arterial Blood pH Calculator

Estimate arterial pH using the Henderson-Hasselbalch equation.

PaCO₂ (mmHg)

HCO₃⁻ (mEq/L)

Arterial pH—

Interpretation—

H⁺ Concentration—

pH = 6.1 + log₁₀(HCO₃⁻ / (0.03 × PaCO₂))

About Arterial Blood pH

Normal arterial blood pH ranges from 7.35 to 7.45. Values below 7.35 indicate acidemia, while values above 7.45 indicate alkalemia. The Henderson-Hasselbalch equation relates pH to PaCO₂ and bicarbonate concentration.