Spike's Calculators

# Pentagon Shaped Concrete Slab Metric  Calculate the amount of concrete needed for a slab in the shape of a pentagon using metres for the side length and millimetres for the slab thickness (depth). This calculator is for calculating the volume of a regular pentagon. In a regular pentagon-shaped slab, all sides are equal in length, and each interior angle is 108°.

### Pentagon Shaped Volume Calculator - Metric

Length of Side:   m
Depth:   mm

#### Amount of concrete needed:

Area:   m ²
Perimeter:   l.m
Cubic Meters:   m ³
Cubic Yards:   yd ³
Cubic Feet:   ft ³

#### Calculation

1. enter the length of one of the sides in metres
2. the slab thickness in millimetres

#### Results

1. the area of the slab in square metres
2. the perimeter of the slab in lineal metres for forming material
3. the amount of concrete needed for pouring the slab in cubic metres
4. the amount of concrete in cubic yards
5. the amount of concrete 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.