// Tools
Bedside calculators
Quick-reference math for the most common biomarker-derived indices. For full formulas, guideline cutoffs and references, open a dedicated calculator page.
Dedicated pages
Each major score has its own page with formula, cutoffs, guidelines and references.
eGFR (CKD-EPI 2021)
Race-free estimated glomerular filtration rate from serum creatinine.
MELD-Na
90-day mortality and liver-transplant priority in cirrhosis (UNOS, age ≥12).
CHA₂DS₂-VASc
Annual ischemic stroke risk in non-valvular atrial fibrillation.
HAS-BLED
1-year major-bleeding risk on oral anticoagulation in AF.
Wells score for PE
Pretest probability of pulmonary embolism in suspected outpatients/ED.
QTc
Heart-rate-corrected QT interval — torsades de pointes risk.
// Inline quick calculators
Glomerular filtration rate
eGFR (CKD-EPI 2021, race-free)
Result
88.9mL/min/1.73m²
G2 (60–89) — mildly decreased.
Insulin resistance
HOMA-IR
Result
1.78
Within normal range; many functional clinicians target <1.0.
Hepatic fibrosis triage
FIB-4 index
Result
1.49
Indeterminate — refer for elastography (VCTE / MR elastography).
Cirrhosis 90-day mortality / transplant priority
MELD-Na
Result
10
Moderate (~6–20%).
AF stroke risk
CHA₂DS₂-VASc
Result
0points
Annual ischemic stroke risk ≈ 0.2% (untreated). Anticoagulation: men ≥2, women ≥3 (excl. sex point).
Anticoagulation bleeding risk
HAS-BLED
Result
0points
Low bleeding risk.
Pulmonary embolism pretest probability
Wells score for PE
Result
0.0points
PE unlikely — D-dimer to exclude (age-adjusted).
Corrected QT interval
QTc
Result
431ms
Normal.
Acid-base
Anion gap
Result
13.0mmol/L (corrected)
Anion gap 13.0; albumin-corrected 13.0. Normal ~8–12 mmol/L.
Calcium homeostasis
Albumin-corrected calcium
Result
9.20mg/dL
Use ionized calcium directly in critical illness, alkalosis, or paraproteinemia.
Conventional ↔ SI
Unit converter
Converted (mmol/L)
5.55 mmol/L
factor = 0.0555