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Calculators for healthcare professionals
Formula calculators for doctors, nurses and optometrists, such as kidney function, the A-a gradient, corrected sodium and lens powers. Each shows its equations and sources, for professionals to check against their own guidelines.
All 5 tools here work now, and none of them needs credits.
Creatinine Clearance & eGFR CalculatorKidney function estimates: Cockcroft–Gault creatinine clearance (actual, ideal and adjusted weight) and race-free CKD-EPI 2021 eGFR, mg/dL or µmol/L.A-a Gradient CalculatorAlveolar–arterial oxygen gradient from a blood gas with the alveolar gas equation, the expected value for age and the P/F ratio, in mmHg or kPa.Corrected Sodium CalculatorSodium corrected for high glucose with the Katz (1.6) and Hillier (2.4) factors, glucose in mg/dL or mmol/L, for professionals.Vertex Distance CalculatorPrescription power at a new vertex distance, such as glasses to contact lenses, with sphere, cylinder and axis, exact and to 0.25 D.Lens Thickness CalculatorSpectacle lens edge and centre thickness from power, diameter and refractive index, with a CR-39 to 1.74 high-index comparison.
Coming next: 444 more calculators for healthcare professionals are planned, 3 of them AI tools. Pick Planned above to see them by name; each one joins this list once it works. Tell us which one you need first.
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