# Gross Floor Area Calculator

How do you measure the total floor area of a building? Don’t do it manually but use The Gross Floor Area Calculator to find out quickly. This tool calculates the gross floor area (GFA) of a building and provide you the total usable floor space.

### What is Gross Floor Area?

Gross Floor Area (GFA) is the total floor area inside the building envelope, including the external walls, but excluding the roof. It is used in construction, real estate, and urban planning to understand the usable space in a building.

### How to Use the Calculator

To use the Gross Floor Area Calculator is easy. You need to input the average area of each floor and the total number of floors in the building. The calculator will then compute the GFA.

**Input Fields:**

**Average Area (A)**: The average area of each floor in square feet (ft²).**Number of Floors (F)**: The total number of floors in the building.

**Example Input Values:**

Input Field | Example Value |
---|---|

Average Area (A) | 2000 ft² |

Number of Floors (F) | 5 |

### How to Calculate Gross Floor Area

The formula to calculate the Gross Floor Area is:

$\text{GFA} = A \times F$

Variable | Description |
---|---|

GFA | Gross Floor Area (ft²) |

A | Average Area of each floor (ft²) |

F | Total Number of Floors in the building |

**Step-by-Step Calculation:**

**Identify the Known Values**: Average area of each floor (A) and the number of floors (F).**Input the Known Values**: Enter these values into the calculator.**Compute the Gross Floor Area**: The calculator uses the formula to find the GFA.

### Example Calculation

For example, you have a building with an average floor area of 2000 ft² and 5 floors.

**Step 1**: Identify $A = 2000$

ft² and $F = 5$

**Step 2**: Use the formula $\text{GFA} = A \times F$

**Step 3**: Calculate $\text{GFA} = 2000 \times 5 = 10000$ft²

The Gross Floor Area is 10,000 ft².

### How To Enter Values Into The Tool

1. Basic Example:

Input Field | Value |
---|---|

Average Area (A) | 2000 ft² |

Number of Floors (F) | 5 |

Gross Floor Area (GFA) | 10,000 ft² |

2. Advanced Example:

For a complex with varying floor areas and multiple buildings:

Building | GFA Calculation |
---|---|

A | $2000 \times 5 = 10,000$ ft² |

B | $1500 \times 3 = 4,500$ |

C | $2500 \times 4 = 10,000$ |

Total |
24,500 ft² |

### FAQs

**What is the Gross Floor Area?**

Gross Floor Area is the total floor space within the building envelope, excluding the roof.

**How do I use the calculator if I only know some values?**

Enter the known values (average area and number of floors) into the calculator. It will compute the GFA for you.

**Can I calculate the GFA for multiple buildings?**

Yes, you can calculate each building’s GFA separately and sum them up for the total GFA.

### Final Words

The Gross Floor Area Calculator is a valuable tool for architects, builders, and planners. I hope you liked it, please do not forget to share your feedback for the improvement.