Adjust total serum calcium levels for variations in albumin.
1. Choose Metric Units
2. Input Serum Values
Estimated Corrected Calcium
8.50 mg/dL
Disclaimer: This tool is for informational and educational purposes only. The Payne formula is a linear approximation. Direct measurement of ionized calcium remains the clinical gold standard, especially in critically ill patients, severe renal disease, or acute acid-base imbalances.