basic
3 × 24
12
15
PO
D
advance
1 d
1
28 ÷ 42
Convert Between Measurement
Systems
You can multiply by fractions to convert between customary and metric units. The table
below lists common customary and metric relationships.
Type of Measure
Length
Weight/Mass
Capacity
Customary

Metric
1 inch (in.) ≈ 2.54 centimeters (cm)
1 foot (ft.) ≈ 0.30 meter (m)
1 yard (yd) ≈ 0.91 meter (m)
1 mile ≈ 1.61 kilometers (km)
1 pound (lb.) ≈ 453.6 grams (g)
1 pound (lb.) ≈ 0.4536 kilograms (kg)
1 ton (T) ≈ 907.2 kilograms (kg)
1 cup (c) ≈ 236.59 milliliters (mL)
1 pint (pt) ≈ 473.18 milliliters (mL)
1 quart (qt) ≈ 946.35 milliliters (mL)
1 gallon (gal) ≈ 3.79 liters (L)
Ex.
Convert 17.22 inches to centimeters. Round to the nearest
hundredth if necessary.
2.54 cm
Since 2.54 centimeters ≈ 1 inch, multiply by 1 in
17.22 in
1
×
2.54 cm
1 in
cross cancel common units
=
43.7388 cm
1
=
43.74 cm
Ex.
Convert 5 kilometers to miles. Round to the nearest hundredth
if necessary.
Since 1 mile ≈ 1.61 kilometers, multiply by
5 km
1
×
1 mi.
1.61 km
cross cancel common units
=
5 mi.
1.61
1 mi.
1.61 km
=
3.11 mi.
Whiteboard time
What is the relationship between feet and
meters? Write as a ratio.
1 ft
.30m
Whiteboard time
What is the relationship between cups and
milliliters? Write as a ratio.
1 c
236.59mL
Whiteboard time
6 yd ≈ _____ m
5.46 m
Whiteboard time
1.6 cm ≈ _____ in
0.63 in
Whiteboard time
17 m ≈ _____ yd
18.68 yd