Marshalltown Community College

Marshalltown Community College

Dose Calculation, IV, Conversion FormulasConversions within Metric system-

1. Metric: L to S =

decimal 3 spaces R(or multiply by 1000)2. Metric: S to L =

decimal 3 spaces L (or divide by 1000)Conversions between measurement systems-3. Grains to Milligrams = X 60

(1 grain = 60 mg)4. Milligrams to Grains = 60

(60 mg = 1 grain)5. Grams to Grains

= X 15

(1 gram = 15 grain)6. Grains to Grams

= 15

(15 grain = 1 gram)7. Change lbs to kg = divide by 2.2

(2.2 # is = 1 kilogram)8. Change kg to lbs = multiply by 2.2(1 kilogram = 2.2 #)9. Change F to C = subtract 32 1.810. Change C to F = multiply by 1.8 + 3211. Dose Calculation Formula 1: Ratio and Proportion Method

H (on hand) : V (vehicle) :: D (desired) : X (unknown)

12. Dose Calculation Formula 2:

D (desired dose)

H (on hand) X V (vehicle, drug form)

=

13. IV Calculation Formula 1: Milliliters per hour

Number of ml

Number of hr = ml/hr

14. IV Calculation Formula 2: Infusion rates for other than 1 hourTotal volume (ml) to infuse X 60 min/hr

Time (minutes)

= ml/hr

15. IV Calculation Formula 3: Drops per minuteTotal volume (ml) to infuse X drop factor (gtt/ml)

Time (minutes)

= gtt/min