1.31 Apply mathematical computations related to
healthcare procedures (metric and household
conversions and measurements.)
 Recognize
and estimate metric
measures.
 Convert among units in the metric
system.
 Convert among household measures
and the metric system.
 Appreciate the value of using the
metric system in health care.
Why do we use the metric system in
health care?
 To align with the rest of the world
 To assure accurate and consistent
communication in a healthcare setting
 Because it is based on 10s, you can
do some calculations in your head!


1 kilometer =
_______________

1 millimeter =
_______________

1 centimeter = _______________
1,000 meters

Kilometer

Meter

Centimeter

Millimeter
Number a sheet of paper from 1 – 10
 When your teacher shows you an item,
write down your estimate of the length,
weight or volume, using the metric
system.


Meters to millimeters – multiply by 1000 or
move decimal three places to the right
 2.540 m = 2540 mm

Millimeters to meters – divide by 1000 or move
decimal three places to the left
 1650 mm = 1.65 m
Meters to kilometers- divide by 1000 or
move decimal three places to the left
 10,000 m = 10 km
 Kilometers to meters- multiply by 1000
or move decimal three places to the
right
 4.559 km = 4,559 m

 Centimeters
to meters- divide by 100
or move decimal two places to the left
 10 cm = 0.1 m
 Centimeters
to millimeters- multiply by
10 or move one decimal places to the
right
 5cm = 50 mm

Grams to milligrams – multiply by 1000 or
move decimal three places to the right
 0.15 g = _____ mg
 0.150 g = 150 mg
 0.15 g = 150 mg

Milligrams to grams– divide by 1000 or move
decimal three places to the left
 500.0 mg = 0.5 g

What would you do to convert grams to
kilograms?
 600.0 g = 0.6 kg

What would you do to convert kilograms to
grams?
 4.500 kg = 4,500 g
1.
0.25 g = ______ mg
7.
88 g = ________ kg
2.
1.5 m = _______ mm
8.
7.5 cm = _______ m
3.
3 mm = ________ m
9.
300 m = ________ km
4.
10 cc = ________ mL
10.
10 kg = __________ g
5.
2 mg = _________ g
11.
40 mg = _________ kg
6.
200 mL = _________L
12.
6 L = _________ mL
1.
0.25 g = 250 mg
7.
88 g = 0.088 kg
2.
1.5 m = 1,500 mm
8.
7.5 cm = 0.075 m
3.
3 mm = 0.003 m
9.
300 m = 0.3 km
4.
10 cc = 10 mL
10.
10 kg = 10,000 g
5.
2 mg = 0.002 g
11.
40 mg = 0.00004 kg
6.
200 mL = 0.2 L
12.
6 L = 6,000 mL
1 ounce (oz) = 0.028 kg or 28 g
 1 pound (lb) = 0.454 kg or 454 g
 1 kg = 2.2 lbs
 To convert lb to kg, divide the number of
pounds by 2.2

 145 lb  2.2 = 65.9 kg

To convert kg to lb, multiply the number
of kilograms by 2.2
 25 kg x 2.2 = 55 lbs
1.
6 oz = ________ kg
7.
2 oz = ________ kg
2.
220 lbs = _______ kg
8.
110 lbs = _______ kg
3.
1362 g = ________ lbs
9.
4540 g = ________ lbs
4.
4 kg = _______ lbs
10.
2 kg = _______ lbs
5.
16 oz = _______ g
11.
10 oz = _______ g
6.
0.336 kg = ________ oz
12.
0.084 kg = _______ oz
1.
6 oz = 0.168 kg
7.
2 oz = 0.056 kg
2.
220 lbs = 100 kg
8.
110 lbs = 50 kg
3.
1362 g = 3 lbs
9.
4540 g = 10 lbs
4.
4 kg = 8.8 lbs
10.
2 kg = 4.4 lbs
5.
16 oz = 448 g
11.
10 oz = 280 g
6.
0.336 kg = 12 oz
12.
0.084 kg = 3 oz

1 inch (in) = 0.025 meter (m) or 2.54 cm
 How many mm in 1 in?




1 foot (ft) = 0.31 meter (m) or 30.48 cm
How many inches in a foot?
How many feet in a yard?
How many meters in a yard?
8.
12 in = 0.3 m
9.
6.35 cm = 2.5 in
10.
5 m = 200 in
11.
200 ft = 62 m
12.
60.96 cm = 2 ft
13.
3 ft 2 in = 96.5 cm
14.
10 m = 10.25 yards
 To
convert meters to inches, move the
decimal first and then use the cm in
formula.
 14 m = _________ in
 14 m = 1400 cm
 1400  2.54 = 551 in







1 milliliter (mL) = 1 cubic centimeter (cc)
1 teaspoon (tsp) = 5 milliliters (mL)
1 tablespoon (tbsp) = 15 milliliters (mL)
1 ounce (oz) = 30 milliliters (mL)
1 cup = 8 oz = 240 mL
1 pint (pt) = 16 oz = 500 mL
1 quart (qt) = 32 oz = 1000 mL = 1 Liter (L)
1.
4 mL = ________ cc
8.
16 mL = _______ cc
2.
20 tsp = _______ mL
9.
10 tsp = _______ mL
3.
20 mL = _______ tsp
10.
40 mL = _______ tsp
4.
4 oz = _______ mL
11.
3 oz = _______ mL
5.
750 mL = _____ cups
12.
120 mL = _____ cup
6.
64 oz = ________ pts
13.
32 oz = ________ pts
7.
9 qts = ________ L
14.
12 qts = ________ L
1.
4 mL = 4 cc
8.
16 mL = 16 cc
2.
20 tsp = 100
9.
10 tsp = 50 mL
3.
20 mL = 4 tsp
10.
40 mL = 8 tsp
4.
4 oz = 120mL
11.
3 oz = 90 mL
5.
750 mL = 3 cups
12.
120 mL = 0.5 cup
6.
64 oz = 4 pts
13.
32 oz = 2 pts
7.
9 qts = 9 L
14.
12 qts = 12 L

1.
260 °F = _______ °C
7.
132 °F = _______ °C
2.
32 °F = _______ °C
8.
34 °F = _______ °C
3.
102.6 °F = _______ °C
9.
101.4 °F = _______ °C
4.
8° C = _______ °F
10.
10 °C = _______ °F
5.
32 °C = ______ °F
11.
36 °C = ______ °F
6.
0 °C = _______ °F
12.
50 °C = _______ °F
1.
260 °F = 126.7 °C
7.
132 °F = 55.6 °C
2.
32 °F = 0 °C
8.
34 °F = 1.1 °C
3.
102.6 °F = 39.2 °C
9.
101.4 °F = 38.6 °C
4.
8° C
10.
10 °C = 50 °F
5.
32 °C = 89.6 °F
11.
36 °C = 96.8 °F
6.
0 °C = 32 °F
12.
50 °C = 122 °F
= 46.4
°F

When taking a written medical math test, write
down the conversions you know before you
start the test.
 We like to write the conversions we know on the
bottom of the page. They become our personal
conversion table.


Rounding – usually to the nearest 100th – but
be flexible.
5.99998 would round to 6