⚖️ Weight & Mass Lab
Learn ounces, pounds, grams, kilograms, scales, estimation, and real-life measurement.
The relationships worth remembering
Learn each measurement system clearly. We will not convert directly between pounds and kilograms.
16 oz = 1 lbcustomary weight
2,000 lb = 1 tonvery heavy objects
1,000 g = 1 kgmetric mass
lb × 16 + ozfind total ounces
Choose a Weight & Mass Skill
Question 1 of 10
Choose the Unit
Choose an answer, then check it.
Weight & Mass Tip:
16 ounces make 1 pound.
16 ounces make 1 pound.
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For parents: Weight & Mass Lab practices ounces, pounds, grams, kilograms, scale reading, conversions, and estimation for students in grades 2–4. Real-world examples help kids choose and compare sensible units.