KRS Website: Drug Information: Calculations / Calculators

Alberta Health Services

Emergency Drug Calculator
Use this Emergency Drug Calculator to calculate pediatric doses of the following drugs: diphenhydramine, epinephrine, Solu-Cortef (hydrocortisone sodium succinate), naloxone, or flumazenil.

Stroke Prevention in Atrial Fib Risk Calculator (SPARC)
Used for estimating risk of stroke and benefits & risks of antithrombotic therapy in patients with chronic atrial fibrillation.

MD+Calc (contains the following calculators):

Padua Prediction Score for Risk of VTE
Determines anti-coagulation need in hospitalized patients by risk of VTE.
Wells' Criteria for DVT
Calculates Wells' Score for risk of DVT.
Wells' Criteria for Pulmonary Embolism
Objectifies risk of pulmonary embolism.

Canadian Cardiovascular Society (CCS) Calculators and Forms
Recommended calculators from CCS, including Framingham Risk Score (FRS) calculator and printable tool

MD+Calc (contains the following claculators):

CHADS₂ Score for Atrial Fibrillation Stroke Risk
Estimates stroke risk in patients with atrial fibrillation.
CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk
Calculates stroke risk for patients with atrial fibrillation, possibly better than the CHADS₂ score.
HAS-BLED Score for Major Bleeding Risk
Estimates risk of major bleeding for patients on anti-coagulation to assess risk-benefit in atrial fibrillation care.

MD+Calc (contains the following calculators):

Bicarbonate Deficit
Calculates the total body bicarbonate deficit
Mean Arterial Pressure (MAP)
Calculates mean arterial pressure.
SIRS, Sepsis, and Septic Shock Criteria
Defines the severity of sepsis and septic shock.

MD+Calc (contains the following calculators):

Absolute Reticulocyte Count & Reticulocyte Index
Assesses appropriate response to anemia, frequently in sickle cell patients.
Anion Gap
Evaluates states of metabolic acidosis.
Calcium Correction for Hypoalbuminemia
Calculates a corrected calcium level for patients with hypoalbuminemia.
Fractional Excretion of Sodium (FENa)
Determines if renal failure is due to pre-renal, intrinsic, or post renal pathology.
Free Water Deficit in Hypernatremia
Calculates free water deficit by estimated total body water.
Serum Osmolality/Osmolarity
Calculates expected serum osmolarity, for comparison to measured osmolarity to detect unmeasured compounds in the serum.

GFR Calculator
eGFR calculator based on CKD-EPI equation
The Kidney Failure Risk Equation
Use this calculator to determine the risk of kidney failure for patients.

Calcium Calculator
Tool from Osteoporosis Canada that calculates amount of additional calcium daily intake required for maintainence of bone health based on gender, age and diet

RxKinetics (contains the following calculators):

Pharmacy Calculations: An Introduction for Pharmacy Technicians, 2nd ed. (2021) by Rewald, Lorang & Schramm
This guide provides students with the pharmacy basics necessary for correctly interpreting prescriptions and drug orders, and performing dosing calculations that technicians face every day.