Grade 5 Measurement: Customary System

Master customary conversions

What You'll Learn

Convert feet, pounds, gallons
Use conversion factors

📖Customary

Memorize the conversion factors! 1 foot = 12 inches, 1 yard = 3 feet = 36 inches, 1 pound = 16 ounces, 1 ton = 2000 pounds, 1 gallon = 4 quarts, 1 quart = 2 pints, 1 pint = 2 cups.

✏️Both directions

7 pounds = 7 × 16 = 112 ounces. 42 feet = 42 ÷ 3 = 14 yards. 3 feet 5 inches = 36 + 5 = 41 inches.

Worked examples

Real problems from the practice worksheets, solved one step at a time.

Example 1
96 ounces = ___ pounds
1. 1 pound = 16 ounces.
2. Ounces are smaller than pounds, so there will be fewer pounds: divide by 16. 96 ÷ 16 = 6.
3. 96 ounces = 6 pounds.
Answer: 6
Example 2
2 pounds 13 ounces = ___ ounces
1. Change the pounds first. 1 pound = 16 ounces, so 2 pounds = 2 × 16 = 32 ounces.
2. Add the extra 13 ounces: 32 + 13 = 45.
3. 2 pounds 13 ounces = 45 ounces.
Answer: 45
Example 3
120 inches = ___ feet
1. 1 foot = 12 inches.
2. Inches are smaller than feet, so there will be fewer feet: divide by 12. 120 ÷ 12 = 10.
3. 120 inches = 10 feet.
Answer: 10