Clinical Calculators & Formulas
Temperature
Degrees F = (1.8)C + 32
Degrees C = (F-32)/1.8
Enter a temperature (just the number, please):
Then:
degrees Celsius = Farenheit.
degrees Farenheit = Celsius.
Size
1 cm = 0.3937 inches
1 inch = 2.54 cm
1 foot = 0.3048 meters
1 meter = 3.2808 feet
Select a height in feet & inches: ' "
Or, type a height in cm:
Then:
Height in inches = in.
Height in cm = cm.
Height in meters = m.
1 Kg = 2.2 lbs
1 ounce = 30g
1 lb = 0.45 Kg
Enter a weight (just the number, please):
Then:
kilograms = pounds.
pounds = kilograms.
Body surface area = square root of: [height (cm) * weight (Kg)] / 3600 = square meters
Enter a height in cm: (just the number, please):
Enter a weight in Kg: (just the number, please):
Then:
Body Surface Area = m2.
Determination of Caloric Needs:
Harris-Benedict Formulas to determine Basal Energy Expenditure
MALE:
66.5 + (13.75 * weight[Kg]) + (5 * height[cm]) - (6.8 * age[yrs])
FEMALE:
655.1 + (9.6 * weight[Kg]) + (1.85 * height[cm]) - (4.7 * age[yrs])
Body Mass Index:
weight[Kg]
height[meters]2
Enter a weight in Kg: (just the number, please):
Enter a height in cm: (just the number, please):
Enter an age: (just the number, please):
Select the patient's gender:

Male

Female
Then:
Basal Energy Expenditure = KCal.
Body Mass Index (BMI) =
Fluids / Liquids
Maintenance Fluids / Hr:
  • 4 mL for each Kg 1-10 +
  • 2 mL for each Kg 11-30 +
  • 1 mL for each Kg >30
1 fluid oz = 30ml
1 mL = 0.034 fluid oz
1 teaspoon (tsp) = 5ml
1 tablespoon (tbl) = 15ml
1 quart = 0.946 liters
Water deficit = 0.6 * Body weight in Kg. * Plasma Na+ concentration/140 - 1)
Enter a weight in Kg: (just the number, please):
If you know plasma Na+ conc., enter just the number:
Then:
Maintenance Hourly Fluids = mL/hr.
Total Body Water = L.
Water Deficit = L.
Creatinine Clearance:
CCr (male) = (140-age) * Kg
Serum creatinine * 72
CCr (female) = CCr (male ) * 0.85
OR: urine creatinine * urine volme (mL)
serum creatinine * time
Enter a weight in Kg: (just the number, please):
Enter a serum creatinine: (just the number, please):
Enter an age: (just the number, please):
Select the patient's gender:

Male

Female
Then:
Creatinine Clearance =
Due Date
Naegele's Rule:
  1. Add 7 days
  2. Subtract 3 months
  3. Add 1 year

Select First day of Last Period: / /


 

Due date:
/ /
Probable date of ovulation:
/ /
Beginning of second trimester
/ /
Beginning of third trimester
/ /