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# circular slab - Volume

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Equation / Last modified by AndrewBudd on 2018/01/19 21:04
`V = `

The **Volume of a Circular Slab** calculator computes the cubic yards (volume)* Circular Slab * of concrete a circular slab based on the radius and depth.

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

- (
**r**) This is the radius of the slab (half of the diameter) - (
**d**) This is the depth of the slab. - Bag Size or STANDARD UNITS

**Volume of Concrete (V): **The volume (**V**) is returned in cubic yards. However, this can be automatically converted to other volume units (e.g. cubic meters) via the pull-down menu. These are the STANDARD UNITS. For DIY convenience, the calculator also can return the number of bags of concrete as follows:

- 40lb bags
- 60lb bags
- 80lb bags

Once you have your answer in cubic units, click on the SYSTEM button and choose the size of bag (above), and vCalc will tell you how many bags you need for that volume of concrete.

**Related Calculators:**

- To compute the amount of rebar needed in a circular slab
- To compute the surface area of a circular concrete slab, CLICK HERE.
- To compute the perimeter or circumference of a circular concrete slab, CLICK HERE.

This equation,

**circular slab - Volume**, references 3 equations/constants.This equation,

**circular slab - Volume**, is used in 2 calculators.