Pregnancy Due Dates Calculator
Calculates pregnancy dates, forward from last period or backward from due date.
Posted in: OB-Gyn
NOTE: All calculations must be re-checked and should not be used alone to guide patient care. See disclaimer.
- Emergency
- ABC Score (Assessment of Blood Consumption) for Massive Transfusion
- ABCD2 Score for TIA
- Absolute Neutrophil Count (ANC)
- Acetaminophen Overdose and NAC Dosing
- Alvarado Score for Acute Appendicitis
- Canadian C-Spine Rule
- Canadian CT Head Injury/Trauma Rule
- CURB-65 Severity Score for Community-Acquired Pneumonia
- Endotracheal Tube (ETT) Size for Pediatrics
- Estimated/Expected Peak Expiratory Flow (Peak Flow)
- Glasgow Coma Scale/Score
- Glasgow-Blatchford Bleeding Score (GBS)
- HIV Needle Stick Risk Assessment Stratification Protocol (RASP)
- King’s College Criteria for Acetaminophen Toxicity
- Modified Centor Score for Strep Pharyngitis
- New Orleans/Charity Head Trauma/Injury Rule
- NEXUS Criteria for C-Spine Imaging
- NIH Stroke Scale/Score (NIHSS)
- Ottawa Ankle Rules
- Ottawa Knee Rules
- Parkland Formula for Burns
- PECARN Pediatric Head Injury/Trauma Algorithm
- PERC Rule for Pulmonary Embolism
- Pittsburgh Knee Rules
- Pregnancy Due Dates Calculator
- PSI/PORT Score: Pneumonia Severity Index for Adult CAP
- Pulmonary Embolism Severity Index (PESI)
- San Francisco Syncope Rule to Predict Serious Outcomes
- Shock Index
- Simplified PESI (Pulmonary Embolism Severity Index)
- SIRS, Sepsis, and Septic Shock Criteria
- TASH Score (Trauma Associated Severe Hemorrhage) for Massive Transfusion
- TIMI Risk Score for STEMI
- TIMI Risk Score for UA/NSTEMI
- Wells’ Criteria for DVT
- Wells’ Criteria for Pulmonary Embolism / PE
- Westley Croup Score
- Intensive Care
- A-a O2 Gradient
- Acetaminophen Overdose and NAC Dosing
- APACHE II Score for ICU Mortality
- Basal Energy Expenditure
- Calcium Correction for Hypoalbuminemia
- Creatinine Clearance (Cockcroft-Gault Equation)
- Ideal Body Weight
- King’s College Criteria for Acetaminophen Toxicity
- Oxygenation Index
- PSI/PORT Score: Pneumonia Severity Index for Adult CAP
- Pulmonary Embolism Severity Index (PESI)
- Sequential Organ Failure Assessment (SOFA) Score
- Simplified PESI (Pulmonary Embolism Severity Index)
- SIRS, Sepsis, and Septic Shock Criteria
- Winters’ Formula for Metabolic Acidosis Compensation
- Internal Medicine
- A-a O2 Gradient
- ABCD2 Score for TIA
- Absolute Neutrophil Count (ANC)
- Absolute Reticulocyte Count (Reticulocyte Index)
- Anion Gap
- BMI and Body Surface Area (BSA)
- Calcium Correction for Hypoalbuminemia
- CHA2DS2-VASc Score for Atrial Fibrillation Stroke Risk
- Child-Pugh Score for Cirrhosis Mortality
- Creatinine Clearance (Cockcroft-Gault Equation)
- CSF WBC Correction for RBCs
- CURB-65 Severity Score for Community-Acquired Pneumonia
- Estimated Average Glucose (eAG) From A1C
- Fractional Excretion of Sodium (FENa)
- Framingham Coronary Heart Disease Risk Score
- Framingham Coronary Heart Disease Risk Score (SI Units)
- Glasgow Alcoholic Hepatitis Score
- HAS-BLED Score for Major Bleeding Risk
- Hepatic Encephalopathy Grades/Stages
- Light’s Criteria for Exudative Effusions
- Maddrey’s Discriminant Function for Alcoholic Hepatitis
- Maintenance Fluids Calculations
- Phenytoin/Dilantin Correction for Albumin or Renal Failure
- PSI/PORT Score: Pneumonia Severity Index for Adult CAP
- Ranson’s Criteria for Pancreatitis Mortality
- Serum Osmolality/Osmolarity
- SIRS, Sepsis, and Septic Shock Criteria
- Sodium Correction for Hyperglycemia
- Stool Osmolar/Osmotic Gap
- Wells’ Criteria for DVT
- Wells’ Criteria for Pulmonary Embolism / PE
- Winters’ Formula for Metabolic Acidosis Compensation
- Surgery/Trauma
- ABC Score (Assessment of Blood Consumption) for Massive Transfusion
- Alvarado Score for Acute Appendicitis
- Basal Energy Expenditure
- Canadian C-Spine Rule
- Canadian CT Head Injury/Trauma Rule
- Injury Severity Score (ISS)
- MELD Score (Model For End-Stage Liver Disease) (12 and older)
- New Orleans/Charity Head Trauma/Injury Rule
- NEXUS Criteria for C-Spine Imaging
- Parkland Formula for Burns
- PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
- Revised Trauma Score
- Shock Index
- TASH Score (Trauma Associated Severe Hemorrhage) for Massive Transfusion
- Renal/Electrolytes
- Anion Gap
- Bicarbonate Deficit
- Calcium Correction for Hypoalbuminemia
- Creatinine Clearance (Cockcroft-Gault Equation)
- Fractional Excretion of Sodium (FENa)
- Fractional Excretion of Urea (FEUrea)
- Free Water Deficit in Hypernatremia
- MDRD GFR Equation
- Serum Osmolality/Osmolarity
- Sodium Correction for Hyperglycemia
- Sodium Correction Rate in Hyponatremia
- Sodium Deficit in Hyponatremia
- Stool Osmolar/Osmotic Gap
- Transtubular Potassium Gradient (TTKG)
- Winters’ Formula for Metabolic Acidosis Compensation
- Cardiology
- CHA2DS2-VASc Score for Atrial Fibrillation Stroke Risk
- CHADS2 Score for Atrial Fibrillation Stroke Risk
- Corrected QT Interval (QTc)
- Framingham Coronary Heart Disease Risk Score
- Framingham Coronary Heart Disease Risk Score (SI Units)
- GRACE ACS Risk and Mortality Calculator
- HAS-BLED Score for Major Bleeding Risk
- LDL Calculated
- Mean Arterial Pressure (MAP)
- TIMI Risk Index
- TIMI Risk Score for STEMI
- TIMI Risk Score for UA/NSTEMI
- Pediatrics
- APGAR Score
- Basal Energy Expenditure
- BMI and Body Surface Area (BSA)
- CSF WBC Correction for RBCs
- Endotracheal Tube (ETT) Size for Pediatrics
- Estimated/Expected Peak Expiratory Flow (Peak Flow)
- Maintenance Fluids Calculations
- Modified Centor Score for Strep Pharyngitis
- Pediatric Ins and Outs (per kg and per hour)
- PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
- Westley Croup Score
- Neuro
- ABCD2 Score for TIA
- CHA2DS2-VASc Score for Atrial Fibrillation Stroke Risk
- CHADS2 Score for Atrial Fibrillation Stroke Risk
- CSF WBC Correction for RBCs
- Glasgow Coma Scale/Score
- Hunt and Hess Classification of Subarachnoid Hemorrhage (SAH)
- Intracerebral Hemorrhage (ICH) Score
- Mean Arterial Pressure (MAP)
- NIH Stroke Scale/Score (NIHSS)
- San Francisco Syncope Rule to Predict Serious Outcomes
- GI
- Child-Pugh Score for Cirrhosis Mortality
- Glasgow Alcoholic Hepatitis Score
- Glasgow-Blatchford Bleeding Score (GBS)
- Hepatic Encephalopathy Grades/Stages
- King’s College Criteria for Acetaminophen Toxicity
- Maddrey’s Discriminant Function for Alcoholic Hepatitis
- MELD Score (Model For End-Stage Liver Disease) (12 and older)
- PELD Score (Pediatric End-Stage Liver Disease) (younger than 12)
- Ranson’s Criteria for Pancreatitis Mortality
- General
