Floor Area Ratio Calculator

Floor Area Ratio, or FAR, tells you how much floor space a building can have based on the land size. It’s like a rulebook for space. You’ll often see it in city planning and building codes.

For example, if your land is 2,000 square feet and the FAR is 1.5, then you can build up to 3,000 square feet of floor space. Simple, right?

Why You Need a Floor Area Ratio Calculator

Doing FAR math by hand? That’s a headache. Our Floor Area Ratio Calculator does the math for you in seconds. No guesswork. No stress.

This tool is perfect if you:

• Plan to build a home or commercial space
• Work in real estate or construction
• Want to know how much space you can legally build

How to Use the Calculator

Using it is a breeze:

1. Enter the total floor area (in square feet).
2. Enter the total land area (also in square feet).
3. Hit the “Calculate” button.

That’s it! You’ll see your FAR result right away.

Floor Area Ratio Formula

Here’s the simple formula:

FAR = Total Floor Area ÷ Land Area

Let’s say your total floor area is 4,000 square feet, and your land size is 2,000 square feet:

FAR = 4000 ÷ 2000 = 2.0

A FAR of 2.0 means you can build floor space that is double your land area.

What Does a FAR of 2.0 Mean?

It means your building's total floor area is twice the land size. So if your lot is 2,000 square feet, you can build 4,000 square feet of space. This could mean two floors of 2,000 square feet each.

What Is a Good Floor Area Ratio?

There’s no one-size-fits-all answer. It depends on your local rules. But here’s a quick idea:

• FAR of 1.0: Good for small homes or single-story buildings
• FAR of 2.0: Better for townhomes or low-rise buildings
• FAR of 3.0+: Often for apartments or commercial spaces

Always check your city’s zoning rules before planning.

Real-Life Example

Let’s say you want to build a small shop on a 1,500 sq. ft. lot. Your local FAR limit is 1.8. Multiply:

1,500 × 1.8 = 2,700 sq. ft.

So, you can build up to 2,700 square feet. Maybe two floors of 1,350 sq. ft. each.

Final Verdict

Our Floor Area Ratio Calculator helps you save time and avoid mistakes. It’s free, easy to use, and super handy for builders, planners, and homeowners.

No need for a math degree just plug in your numbers and go!

FAQs

What is FAR in simple words?

It’s how much you can build based on your land size.

What’s the formula for FAR?

FAR = Total Floor Area ÷ Land Area

Is a higher FAR better?

Not always. Higher FAR means more space, but it depends on zoning laws.

Can I use this for commercial buildings?

Yes! It works for homes, shops, offices—any type of building.

What if my land is in square meters?

Just convert it to square feet first. The formula stays the same.