# Circular Slab Concrete Calculator -Metric Measurements

Calculate the amount of concrete needed using metric measurements for pouring a circular slab.

To calculate the cubic volume of concrete needed you need to know the diameter of the circle in metres and the required depth of the slab in millimetres

### Formula's used:

**Area**

A = π * D² ÷ 4

where A is the area in square metres, π = 3.14159265358979, D = diameter of circle

**Perimeter**

P = π * D

where P is the perimeter in metres, π = 3.14159265358979, D = diameter of circle

**Volume**

V = π * D ÷ 4 * (d ÷ 1000)

where V is the volume in cubic metres, π = 3.14159265358979, D = diameter of circle, d = depth of slab in millimetres converted into metres

**Example calculation for volume:**

Diameter of slab = 24.6 metres depth of slab = 100 millimetres 3.14159265358979 * 24.6 * 24.6 ÷ 4 * (0.1) 475.29 * 0.1 = 47.529 cubic metres of concrete needed for this circular slabTo convert cubic metres to cubic yards multiply cubic metres * 1.30795061931439

To convert cubic metres to cubic feet multiply cubic metres * 35.3146667214886

### Circular Concrete Slab - Metric

#### Calculation

- enter the diameter of the slab in metres
- slab depth in millimetres

#### Results

- area of slab in square metres
- perimeter of slab
- concrete needed in cubic metres
- concrete needed in cubic yards
- concrete needed in cubic feet

### When Ordering Concrete

This concrete calculator will help you in estimating the amount of concrete needed for your project. The amount given as needed, does not include any waste. It is recommended, depending on the job you are doing, to add anywhere from an extra 4% to 10% to your concrete order to make sure you have enough concrete to finish the job. Ask when ordering the concrete. They will be able to give you a good idea of what is needed.##### Imperial

Complete FoundationColumns

Column + Pad

Footings

Footing + Wall

Foundation Wall

Pads

Rectangle Post + Pad

Slabs

Stairs

Stairs - Round

##### Metric

Complete FoundationColumns

Column + Pad

Footings

Footing + Wall

Foundation Wall

Pads

Rectangle Post + Pad

Slabs

Stairs

Stairs - Round

##### Shapes using Imperial & Metric Measurements

CircleCircle - Metric

Donut

Donut - Metric

Equilateral Triangle

Octagon

Oval

Pentagon

Scalene Triangle

Trapazoid

Plastic Concrete Footing Form