# Estimating Concrete

## Concrete volume per sq. ft. of slab

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Concrete is in general calculated in *cubic yards - cy. *

*v = 0.0031 l w t (1)*

*where *

*v = required concrete - cy (cu. yards)*

*l = slab length (ft)*

*w = slab width (ft)*

*t = slab depth (in)*

- 1 cubic yard = 27 cubic feet
- 1 ft = 12 in

### Concrete Volume per sq.ft of Slab

Depth (in) | Volume (cy per sq.ft.) |
---|---|

2 | 0.006 |

4 | 0.012 |

6 | 0.019 |

8 | 0.024 |

10 | 0.031 |

- 1 in (inch) = 25.4 mm = 2.54 cm = 0.0254 m
- 1 yd
^{3}= 0.7646 m^{3} - 1 ft
^{2}= 0.0929 m^{2}

### Area Covered by Concrete

The table below shows the area (sq.ft.) that 1 cu. yard of concrete will cover for various depths.

Depth (in) | Area (sq.ft.) |
---|---|

2 | 162 |

3 | 108 |

4 | 81 |

5 | 65 |

6 | 54 |

7 | 46.3 |

8 | 40.5 |

9 | 36 |

10 | 32.4 |

11 | 29.5 |

12 | 27 |

Concrete required for concrete slabs can be estimated below:

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