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`"Torus"_"(weight)" = [1/4 pi^2 ( r + R )( R - r )^2]* "mD" `

Enter a value for all fields

The **Torus Weight (Mass)** calculator computes the weight or mass of a torus (circular tube) with an inner radius of (a), an outer radius of (b) and a mean density (mD). * Torus - Circular Tube*

**INSTRUCTIONS:** Choose units and enter the following:

- (
**r**) The inner radius - (
**R**) This outer radius - (
**mD**) The mean density of the material in the torus.

**Torus Mass / Weight (M):**. The calculator returns the mass in kilograms. However, this can be automatically converted to compatible units via the pull-down menu.

- Volume of a Torus based on the inner and outer radii
- Volume of a Torus based on the outer radius (R) and the radius of the tube (r)
- Mass or Weight of Torus
- Surface Area of a Torus

This formula computes the volume of the geometric shape based on the input parameters. With the computed volume, this formula then executes the simple equation below to compute the approximate mass of the object.

`mass = mu_(density) * volume`

The mean density (`mu_(density)`) of many common substances, elements, liquids and materials can be found by clicking** HERE **(e.g. the `mu_(density) (water)` is 1000.0 kg/m³).