Student resources
Grades 3-8
Weight Conversion Practice Worksheet
Weight and mass conversion practice helps students compare small objects, packages, food labels, and science measurements.
Key ideas
- 1 pound equals 16 ounces.
- 1 kilogram equals 1,000 grams.
- 1 gram equals 1,000 milligrams.
- A larger unit usually gives a smaller number.
Practice Set
| Problem | Hint | Topic |
|---|---|---|
| Convert 5 lb to oz | 1 lb = 16 oz | Customary weight |
| Convert 64 oz to lb | Divide by 16 | Customary weight |
| Convert 3 kg to g | 1 kg = 1,000 g | Metric mass |
| Convert 2,500 g to kg | Divide by 1,000 | Metric mass |
| Convert 4 g to mg | 1 g = 1,000 mg | Metric mass |
| Convert 1.5 tons to lb | 1 ton = 2,000 lb | Customary weight |
Practice questions
Convert 5 lb to ounces.
Calculation: 5 x 16 = 80
Answer: 80 ounces
Convert 64 ounces to pounds.
Calculation: 64 / 16 = 4
Answer: 4 pounds
Convert 3 kg to grams.
Calculation: 3 x 1,000 = 3,000
Answer: 3,000 grams
Convert 2,500 grams to kilograms.
Calculation: 2,500 / 1,000 = 2.5
Answer: 2.5 kilograms
Convert 4 grams to milligrams.
Calculation: 4 x 1,000 = 4,000
Answer: 4,000 milligrams
Convert 1.5 tons to pounds.
Calculation: 1.5 x 2,000 = 3,000
Answer: 3,000 pounds