Clinical calculators

Open a linked workflow to enter findings and calculate. Some tools appear after you record the relevant clinical context.

Search by calculator or diseaseSpecialty

208 calculators

4Ts · actual suspected-HIT context
- Thrombocytopenia · Outpatient Source
A1c & treatment goal
- Diabetes · Outpatient Source
ABCD² — evaluated resolved TIA
- Stroke / TIA · Outpatient Source
Actual alcohol/opioid timeline
- Alcohol-use disorder · Outpatient Source
Actual angina / functional response
- Chronic coronary disease / angina · Outpatient Source
Actual ascites weight and urine response
- Cirrhosis · Outpatient Source
Actual BMI and observed weight change
- Obesity · Outpatient Source
Actual bronchodilator response
- Asthma · Outpatient Source
Actual cigarette exposure and product choice
- Tobacco use & cessation · Outpatient Source
Actual course and remaining supply
- Diverticulitis · Outpatient Source
Actual EF / beta-blocker indication context
- Chronic coronary disease / angina · Outpatient Source
Actual effective-treatment clock
- Skin & soft-tissue infection · Outpatient Source
Actual episode and wheal duration
- Urticaria & angioedema · Outpatient Source
Actual external US FRAX / treatment evidence
- Osteoporosis · Outpatient Source
Actual fecal calprotectin / assay range
- Inflammatory bowel disease · Outpatient Source
Actual fecal elastase and specimen quality
- Chronic diarrhea · Outpatient Source
Actual GAD-7 change
- Anxiety · Outpatient Source
Actual insulin preparation & pump reference
- Diabetic ketoacidosis · Outpatient Source
- Hyperosmolar hyperglycemic state · Outpatient Source
Actual magnesium trend
- Hypomagnesemia · Outpatient Source
Actual measured change & resolution components
- Diabetic ketoacidosis · Outpatient Source
- Hyperosmolar hyperglycemic state · Outpatient Source
Actual obstructive-study index
- Obstructive sleep apnea · Outpatient Source
Actual opioid exposure — CDC 2022 MME
- Pain management · Outpatient Source
- Low-back pain · Outpatient Source
Actual paired orthostatic BP change
- Dizziness & vertigo · Outpatient Source
Actual phenotype and systemic findings
- Diverticulitis · Outpatient Source
Actual platelet count / comparable trend
- Thrombocytopenia · Outpatient Source
Actual postural BP change
- Syncope & presyncope · Outpatient Source
Actual potassium trend
- Hypokalemia · Outpatient Source
Actual recorded attack frequency
- Panic attacks & panic disorder · Outpatient Source
Actual remaining antibiotic doses
- C. difficile infection · Outpatient Source
Actual sleep efficiency
- Insomnia · Outpatient Source
Actual sodium trend
- Hyponatremia · Outpatient Source
- Hypernatremia · Outpatient Source
Actual stone/anatomy context — not a passage score
- Kidney & ureteral stones · Outpatient Source
Actual stool-frequency change
- Inflammatory bowel disease · Outpatient Source
Actual stool-frequency change
- Irritable bowel syndrome · Outpatient Source
Actual thyroid biochemical pattern
- Hypothyroidism · Outpatient Source
- Hyperthyroidism · Outpatient Source
Actual tTG-IgA / assay upper-limit ratio
- Celiac disease & testing · Outpatient Source
Actual urate / treat-to-target gap
- Gout · Outpatient Source
Actual urine / fluid balance
- Acute pancreatitis · Outpatient Source
Actual weight and urine observations
- Acute diarrhea · Outpatient Source
Actual weight response and product-specific checkpoint
- Obesity · Outpatient Source
Adult Centor findings — test-selection aid
- Upper respiratory infection / acute cough · Outpatient Source
Albumin-adjusted gap —4 g/dL reference
- Acid–base disorders · Outpatient Source
Albuminuria & choice
- Hypertension · Outpatient Source
Albuminuria & kidney-protection dose
- Diabetes · Outpatient Source
Already received IV volume and observed review
- Fluids & balance · Outpatient Source
Alternative basal pen · actual dose, fasting trend and goal
- Diabetes · Outpatient Source
Anion-gap snapshot
- Acute kidney injury · Outpatient Source
APRI
- Abnormal liver tests · Outpatient Source
- Cirrhosis · Outpatient Source
- Hepatitis C · Outpatient Source
ASGE 2019 duct-stone route
- Gallbladder & bile duct disease · Outpatient Source
ATS/IDSA severe CAP criteria
- Pneumonia · Outpatient Source
AUA-SI / IPSS — past-month symptom burden
- BPH / urinary symptoms · Outpatient Source
B12, folate and functional-marker interpretation
- B12 & folate deficiency · Outpatient Source
Biochemical injury pattern
- Abnormal liver tests · Outpatient Source
- Cirrhosis · Outpatient Source
- Hepatitis C · Outpatient Source
BISAP · first 24 hours
- Acute pancreatitis · Outpatient Source
Bisoprolol 1.25 mg once daily
- Heart failure · Outpatient Source
BMI & weight context
- Diabetes · Outpatient Source
BODE / BMI
- COPD · Outpatient Source
BP range & target
- Hypertension · Outpatient Source
Calculated mean arterial pressure
- Sepsis & septic shock · Outpatient Source
Calculated total osmolality
- Hyponatremia · Outpatient Source
- Hypernatremia · Outpatient Source
Calculated transferrin saturation
- Anemia & iron deficiency · Outpatient Source
Canadian Syncope Risk Score — qualified index ED only
- Syncope & presyncope · Outpatient Source
CDI — actual severity context
- C. difficile infection · Outpatient Source
Central 6 g preparation — no response forecast
- Hypomagnesemia · Outpatient Source
CHA₂DS₂-VASc
- Atrial fibrillation · Outpatient
CKD persistence and G/A categories
- Chronic kidney disease · Outpatient Source
CKD-EPI 2021
- Atrial fibrillation · Outpatient
Clinical phenotype and duration
- Low-back pain · Outpatient Source
Cockcroft–Gault
- Atrial fibrillation · Outpatient
CURB-65
- Pneumonia · Outpatient Source
Current direct safety context
- Depression · Outpatient Source
- Anxiety · Outpatient Source
Current DKA / HHS / mixed components
- Diabetic ketoacidosis · Outpatient Source
- Hyperosmolar hyperglycemic state · Outpatient Source
Current versus dry weight
- Heart failure · Outpatient Source
D-dimer threshold & qualified context
- Venous thromboembolism · Outpatient Source
DECAF
- COPD · Outpatient Source
Diagnostic evidence
- Acute pancreatitis · Outpatient Source
DKA / HHS components
- Diabetes · Outpatient Source
EF phenotype & functional class
- Heart failure · Outpatient Source
Emergency potassium components — actual values / exact preparation
- Hyperkalemia · Outpatient Source
Enalapril 2.5 mg once daily
- Heart failure · Outpatient Source
Enzyme dose and food-linked supply
- Chronic diarrhea · Outpatient Source
Ethanol-adjusted gap · 4.6 reference
- Acid–base disorders · Outpatient Source
- Poisoning & intoxication · Outpatient Source
Examined source and hearing risk
- Ear pain, hearing & cerumen · Outpatient Source
Existing STOP-Bang screening
- Obstructive sleep apnea · Outpatient Source
Extent & systemic findings
- Skin & soft-tissue infection · Outpatient Source
Ezetimibe · dose and measured-response context
- Dyslipidemia & ASCVD prevention · Outpatient Source
Fasting trend · Lantus U-100 dose review
- Diabetes · Outpatient Source
FIB-4
- Abnormal liver tests · Outpatient Source
- Cirrhosis · Outpatient Source
- Hepatitis C · Outpatient Source
Finerenone HF dose decision
- Heart failure · Outpatient Source
Finite D5W volume / pump arithmetic
- Hypernatremia · Outpatient Source
Fluid balance & goals
- Heart failure · Outpatient Source
Fractional excretion of sodium (FENa)
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
Fractional excretion of urea (FEUrea; nitrogen basis)
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
Free-water deficit — explicit assumptions
- Hypernatremia · Outpatient Source
Ganzoni theoretical total iron deficit
- Anemia & iron deficiency · Outpatient Source
Glasgow-Blatchford score — admission upper GI bleeding
- Gastrointestinal bleeding · Outpatient Source
Glucose-adjusted sodium — chosen reference factor
- Hyponatremia · Outpatient Source
- Hypernatremia · Outpatient Source
GOLD
- COPD · Outpatient Source
HAS-BLED
- Atrial fibrillation · Outpatient
Headache frequency and medication-day pattern
- Migraine & headache · Outpatient Source
HF iron course
- Heart failure · Outpatient Source
HFrEF · hydralazine / nitrate
- Heart failure · Outpatient Source
HFrEF · mineralocorticoid receptor antagonist
- Heart failure · Outpatient Source
HFrEF · sinus-rate adjunct
- Heart failure · Outpatient Source
Hypercalcemia — actual US-to-SI unit reference
- Hypercalcemia · Outpatient Source
Hyperkalemia — actual US-to-SI unit reference
- Hyperkalemia · Outpatient Source
Hypermagnesemia — actual US-to-SI unit reference
- Hypermagnesemia · Outpatient Source
Hyperphosphatemia — actual US-to-SI unit reference
- Hyperphosphatemia · Outpatient Source
Hypocalcemia — actual US-to-SI unit reference
- Hypocalcemia · Outpatient Source
Hypokalemia — actual US-to-SI unit reference
- Hypokalemia · Outpatient Source
Hypomagnesemia — actual US-to-SI unit reference
- Hypomagnesemia · Outpatient Source
Hypophosphatemia — actual US-to-SI unit reference
- Hypophosphatemia · Outpatient Source
Initial crystalloid volume reference
- Sepsis & septic shock · Outpatient Source
Inpatient insulin & targets
- Diabetes · ED Source
ISF, carbohydrate ratio & correction
- Diabetes · Outpatient Source
IV insulin dose & pump arithmetic
- Diabetic ketoacidosis · Outpatient Source
- Hyperosmolar hyperglycemic state · Outpatient Source
Kidney function
- COPD · Outpatient Source
- Heart failure · Outpatient Source
- Hypertension · Outpatient Source
- Diabetes · Outpatient Source
- Pneumonia · Outpatient Source
- Pain management · Outpatient Source
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
- Urinary tract infection · Outpatient Source
- Hypophosphatemia · Outpatient Source
- Skin & soft-tissue infection · Outpatient Source
- Gastroesophageal reflux · Outpatient Source
- Venous thromboembolism · Outpatient Source
- Panic attacks & panic disorder · Outpatient Source
- Osteoporosis · Outpatient Source
- Upper respiratory infection / acute cough · Outpatient Source
- Migraine & headache · Outpatient Source
- Diverticulitis · Outpatient Source
- Hematuria & proteinuria · Outpatient Source
- Kidney & ureteral stones · Outpatient Source
- Low-back pain · Outpatient Source
- Ear pain, hearing & cerumen · Outpatient Source
- Peripheral neuropathy · Outpatient Source
- Alcohol-use disorder · Outpatient Source
Kidney function
- Anxiety · Outpatient Source
Kidney function
- Inflammatory bowel disease · Outpatient Source
Kidney function
- Gout · Outpatient Source
Kidney function
- Osteoarthritis & joint function · Outpatient Source
Kidney function
- Urticaria & angioedema · Outpatient Source
Kidney function
- Tobacco use & cessation · Outpatient Source
Kidney-protection treatment fit
- Chronic kidney disease · Outpatient Source
LDL-C response & prevention intensity
- Diabetes · Outpatient Source
LDL-C response & prevention intensity
- Dyslipidemia & ASCVD prevention · Outpatient Source
LDL-C response & prevention intensity
- Chronic coronary disease / angina · Outpatient Source
Loop diuretic conversion
- Heart failure · Outpatient Source
Measured diuretic response
- Heart failure · Outpatient Source
Measured output and balance
- Fluids & balance · Outpatient Source
Measured serum osmolal gap
- Acid–base disorders · Outpatient Source
- Poisoning & intoxication · Outpatient Source
Measured sodium, reference correction & anion gap
- Diabetic ketoacidosis · Outpatient Source
- Hyperosmolar hyperglycemic state · Outpatient Source
Measured-component anion gap
- Acid–base disorders · Outpatient Source
Measured-Na effective osmolality
- Hyponatremia · Outpatient Source
- Hypernatremia · Outpatient Source
Memantine IR: absolute creatinine clearance
- Cognitive decline & dementia · Outpatient Source
Metabolic risk components
- Obesity · Outpatient Source
Metolazone 2.5 mg orally once
- Heart failure · Outpatient Source
Microcytosis · Mentzer reference
- Anemia & iron deficiency · Outpatient Source
Microscopy and quantitative urine context
- Hematuria & proteinuria · Outpatient Source
Moderate fluid proposal
- Acute pancreatitis · Outpatient Source
NIHSS — observed neurologic examination
- Stroke / TIA · Outpatient Source
Observed cigarette-use change
- Tobacco use & cessation · Outpatient Source
Observed diary change
- Migraine & headache · Outpatient Source
Observed glucose change
- Diabetes · Outpatient Source
Observed lactate change
- Sepsis & septic shock · Outpatient Source
Observed non-HDL-C
- Dyslipidemia & ASCVD prevention · Outpatient Source
Observed non-HDL-C
- Chronic coronary disease / angina · Outpatient Source
Observed pain and functional response
- Peripheral neuropathy · Outpatient Source
Observed postural BP change
- Geriatric care · Outpatient Source
Observed seizure timing / capped second-line reference
- Seizures & status epilepticus · Outpatient Source
Optional stool-water osmotic-gap reference
- Chronic diarrhea · Outpatient Source
Original four-variable KFRE · 2 and 5 years
- Chronic kidney disease · Outpatient Source
Original oral course and remaining tablet/co-ion arithmetic
- Hypophosphatemia · Outpatient Source
Ottawa ankle rule
- Ankle & foot injury / uncertain pain · Outpatient Source
Ottawa foot rule
- Ankle & foot injury / uncertain pain · Outpatient Source
Ottawa Knee Rule
- Knee pain & injury · Outpatient Source
Paired FEMg · filterable-fraction reference
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
- Hypomagnesemia · Outpatient Source
Paired FEphosphate
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
- Hypophosphatemia · Outpatient Source
PaO₂ / FiO₂ ratio — paired arterial observation
- Acute respiratory failure · Outpatient Source
PEF / personal best
- Asthma · Outpatient Source
PERC
- Venous thromboembolism · Outpatient Source
Persistent symptom / CRS context
- Rhinitis & persistent nasal symptoms · Outpatient Source
Pittsburgh knee radiography rule — adult comparator
- Knee pain & injury · Outpatient Source
Prescribed meal / correction arithmetic
- Diabetes · Outpatient Source
PREVENT · verified risk
- Hypertension · Outpatient Source
PREVENT-ASCVD eligibility / external result
- Dyslipidemia & ASCVD prevention · Outpatient Source
qSOFA · secondary risk prompt
- Sepsis & septic shock · Outpatient Source
Qsymia · actual-weight creatinine clearance
- Obesity · Outpatient Source
Qualified acetaminophen treatment-line reference
- Poisoning & intoxication · Outpatient Source
Recorded 30-day use and actual response
- Alcohol-use disorder · Outpatient Source
Recorded AKI criteria / stage
- Acute kidney injury · Outpatient Source
Recorded antipsychotic monitoring baseline
- Bipolar disorder · Outpatient Source
Recorded cognitive assessment and daily function
- Cognitive decline & dementia · Outpatient Source
Recorded disability instrument
- Migraine & headache · Outpatient Source
Recorded external panic severity — no questionnaire
- Panic attacks & panic disorder · Outpatient Source
Recorded GAD-7
- Depression · Outpatient Source
- Anxiety · Outpatient Source
Recorded interval since last alcohol / reduction
- Alcohol withdrawal · Outpatient Source
Recorded last-known-well interval
- Stroke / TIA · Outpatient Source
Recorded neurologic and foot examination
- Peripheral neuropathy · Outpatient Source
Recorded official 4AT total
- Delirium · Outpatient Source
Recorded official CIWA-Ar
- Alcohol withdrawal · Outpatient Source
Recorded official PAWSS
- Alcohol withdrawal · Outpatient Source
Recorded PHQ-9
- Depression · Outpatient Source
- Anxiety · Outpatient Source
Recorded PTSD instrument and observed change
- PTSD & trauma-related symptoms · Outpatient Source
Reported pain vs baseline & actual response
- Pain management · Outpatient Source
Reported pain vs baseline & actual response
- Osteoarthritis & joint function · Outpatient Source
Reticulocyte response to the actual anemia
- Anemia & iron deficiency · Outpatient Source
Reticulocyte response to the actual anemia
- B12 & folate deficiency · Outpatient Source
Same-assay troponin change — arithmetic only
- Acute coronary syndrome · Outpatient Source
Site & treatment-day context
- Urinary tract infection · Outpatient Source
Site, extent and response
- Atopic & contact dermatitis · Outpatient Source
Sodium-phosphate preparation / co-ion reference
- Hypophosphatemia · Outpatient Source
sPESI
- Venous thromboembolism · Outpatient Source
STOP-BANG
- Atrial fibrillation · Outpatient
Symptoms
- COPD · Outpatient Source
TG18 cholecystitis severity
- Gallbladder & bile duct disease · Outpatient Source
TG18 gallbladder evidence
- Gallbladder & bile duct disease · Outpatient Source
Timed actual hemoglobin change
- Gastrointestinal bleeding · Outpatient Source
Timing, examination and immediate pathway
- Dizziness & vertigo · Outpatient Source
Topiramate — indexed creatinine clearance
- Migraine & headache · Outpatient Source
ULT indication / shared decision
- Gout · Outpatient Source
Urine anion gap
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
- Acid–base disorders · Outpatient Source
Urine osmolal gap
- Acute kidney injury · Outpatient Source
- Chronic kidney disease · Outpatient Source
- Acid–base disorders · Outpatient Source
Wells DVT
- Venous thromboembolism · Outpatient Source
Wells PE
- Venous thromboembolism · Outpatient Source
Whole-bag phosphorus dose and co-ion arithmetic
- Hypophosphatemia · Outpatient Source
Winter arterial-pCO₂ reference
- Acid–base disorders · Outpatient Source
Worsening HF · vericiguat
- Heart failure · Outpatient Source

Clinical calculators

4Ts · actual suspected-HIT context

A1c & treatment goal

ABCD² — evaluated resolved TIA

Actual alcohol/opioid timeline

Actual angina / functional response

Actual ascites weight and urine response

Actual BMI and observed weight change

Actual bronchodilator response

Actual cigarette exposure and product choice

Actual course and remaining supply

Actual EF / beta-blocker indication context

Actual effective-treatment clock

Actual episode and wheal duration

Actual external US FRAX / treatment evidence

Actual fecal calprotectin / assay range

Actual fecal elastase and specimen quality

Actual GAD-7 change

Actual insulin preparation & pump reference

Actual magnesium trend

Actual measured change & resolution components

Actual obstructive-study index

Actual opioid exposure — CDC 2022 MME

Actual paired orthostatic BP change

Actual phenotype and systemic findings

Actual platelet count / comparable trend

Actual postural BP change

Actual potassium trend

Actual recorded attack frequency

Actual remaining antibiotic doses

Actual sleep efficiency

Actual sodium trend

Actual stone/anatomy context — not a passage score

Actual stool-frequency change

Actual stool-frequency change

Actual thyroid biochemical pattern

Actual tTG-IgA / assay upper-limit ratio

Actual urate / treat-to-target gap

Actual urine / fluid balance

Actual weight and urine observations

Actual weight response and product-specific checkpoint

Adult Centor findings — test-selection aid

Albumin-adjusted gap —4 g/dL reference

Albuminuria & choice

Albuminuria & kidney-protection dose

Already received IV volume and observed review

Alternative basal pen · actual dose, fasting trend and goal

Anion-gap snapshot

APRI

ASGE 2019 duct-stone route

ATS/IDSA severe CAP criteria

AUA-SI / IPSS — past-month symptom burden

B12, folate and functional-marker interpretation

Biochemical injury pattern

BISAP · first 24 hours

Bisoprolol 1.25 mg once daily

BMI & weight context

BODE / BMI

BP range & target

Calculated mean arterial pressure

Calculated total osmolality

Calculated transferrin saturation

Canadian Syncope Risk Score — qualified index ED only

CDI — actual severity context

Central 6 g preparation — no response forecast

CHA₂DS₂-VASc

CKD persistence and G/A categories

CKD-EPI 2021

Clinical phenotype and duration

Cockcroft–Gault

CURB-65

Current direct safety context

Current DKA / HHS / mixed components

Current versus dry weight

D-dimer threshold & qualified context

DECAF

Diagnostic evidence

DKA / HHS components

EF phenotype & functional class

Emergency potassium components — actual values / exact preparation