Common Sphere Volume Mistakes (And How to Avoid Them)

Five Most Common Pitfalls

1. Using Diameter Instead of Radius: Forgetting to divide diameter by 2 leads to an answer that is 2³ = 8 times too big.
2. Squaring Instead of Cubing: Confusing the volume formula r³ with surface area r².
3. Incorrect Order of Operations: Multiplying 4/3 × r and then cubing the product. You must cube r first!
4. Mixing Metric Units: Using radius in millimeters while reporting volume in cubic centimeters without converting.
5. Writing Square Units for Volume: Always write cm³ or m³, never cm².