**Q: What does spheres volume calculator calculate?**

A: The online calculator for spheres can calculate three unknown values of a sphere given any one known variable. The known variables include the radius (r), surface area (A), volume (V), and circumference (C) of the sphere.

**Q: How is a sphere defined?**

A: A sphere is a three-dimensional shape consisting of all points that are equidistant from a given center point. The radius (r) represents the distance from the center to any point on the sphere's surface.

**Q: What are the units used in the calculations?**

A: The units displayed in the calculator are for convenience and do not affect the calculations. They provide an indication of the order of magnitude for the results. For example, if the radius is given in millimeters (mm), the calculations will yield the surface area in square millimeters (mm²), volume in cubic millimeters (mm³), and circumference in millimeters (mm).

**Q: What formulas are used in the calculator?**

A: The calculator uses the following formulas in terms of the radius (r):

**Volume of a sphere: V = (4/3)πr³**

**Circumference of a sphere: C = 2πr**

**Surface area of a sphere: A = 4πr²**

**Q: How is the value of π (pi) used in the calculations?**

A: The value of π (pi) is a mathematical constant approximately equal to 3.1415926535898. It is used in the formulas to calculate the volume, surface area, and circumference of the sphere accurately. The calculator provides the answers in terms of π.

**Q: Can the calculator handle different units of measurement?**

A: Yes, the calculator can handle different units of measurement. However, it is important to ensure that the units are consistent across the known and unknown variables to obtain accurate results.