Math calculators

Area Converter Calculator

Updated Sep 1, 2026 By Jehan Wadia
Rate Formulas
Value
Accepts decimals and scientific notation (e.g. 1.5e6). The result updates as you type.
Units
Display Options
Decimal Places
Unit Spelling
Result
Step-by-Step Solution
Conversion Breakdown

Introduction

This area converter calculator lets you switch between different units of area quickly and easily. This tool converts square meters to square feet, acres to hectares, and any other area unit.

It supports over 100 area units, including metric units like square kilometers, imperial units like square miles, and regional units used around the world such as rai, tsubo, dunum, and bigha. Just type in a number, pick your units, and get your answer right away. The result updates as you type, so there is no need to wait.

Each conversion comes with a step-by-step solution that shows exactly how the math works. You can see the conversion factor, the formula used, and a full breakdown of each step. This makes it a great tool for students, teachers, engineers, real estate professionals, and anyone who works with land measurements or area calculations.

How to Use Our Area Converter Calculator

Enter an area value and pick your units. The calculator will convert your number from one area unit to another and show the result with a full step-by-step breakdown.

Value: Type the number you want to convert into the value field. You can use decimals or scientific notation like 1.5e6. Click the ± button to switch between positive and negative, or click × to clear the field.

Convert From: Pick the area unit you are starting with. Use the search box above the dropdown to find a unit fast. Units are sorted into groups like Metric, Imperial, and many regional options from around the world.

Convert To: Pick the area unit you want your answer in. You can also search this list. Click the Swap button between the two dropdowns to flip the units around.

Decimal Places: Choose how many decimal places to show in your result. Pick 1, 2, 3, 4, 6, or Full for the most detail.

Unit Spelling: Choose American to spell units like "meter" or British to spell them like "metre."

Convert: Press the Convert button to run the calculation. Your converted value will appear in the Result box below. Use the Copy button to copy the result to your clipboard. Press Reset to set everything back to the defaults.

What Is Area Conversion?

Area is the amount of space a flat surface covers. We measure area in square units, like square meters, square feet, or acres. Different countries and fields of work use different units. For example, land in the United States is often measured in acres, while most other countries use hectares. This calculator lets you convert between all of these units quickly and accurately.

How Area Units Work

A square unit is based on a length unit multiplied by itself. A square meter is a square that is one meter long and one meter wide. A square foot is a square that is one foot long and one foot wide. To convert from one area unit to another, you multiply your value by a conversion factor. This factor tells you how many of the new unit fit inside one of the old unit.

Common Area Conversions

Some of the most used area conversions include square meters to square feet, acres to hectares, and square miles to square kilometers. One acre equals 43,560 square feet. One hectare equals 10,000 square meters. One square mile equals 640 acres. These conversions come up often in real estate, farming, construction, and science. If you are working on a project that involves square footage, converting between metric and imperial area units is a common step.

When You Need to Convert Area

You might need to convert area when buying or selling land, planning a garden, working on a building project, or doing homework. If your project involves concrete, mulch, or soil, knowing the exact area in the right unit is the first step to figuring out how much material you need. Scientists also convert area when working with very small units like barns or very large ones like square light-years. No matter what units you start with, the math works the same way: multiply by the right factor, and you get your answer in the new unit.

Metric vs. Imperial Area Units

The metric system uses square millimeters, square centimeters, square meters, and square kilometers. The imperial system uses square inches, square feet, square yards, square miles, and acres. Many countries around the world also have their own traditional land units, such as the rai in Thailand, the mu in China, or the tsubo in Japan. This tool supports all of these and many more.


Formulas used

Conversion factor between two area units
f = \frac{F_{\text{from}}}{F_{\text{to}}}
Converted area value
A_{\text{to}} = A_{\text{from}} \times f = A_{\text{from}} \times \frac{F_{\text{from}}}{F_{\text{to}}}

Frequently asked questions

Can I convert negative area values?

Yes. Click the ± button to toggle between positive and negative values. While negative area does not exist in geometry, negative values can be useful in math, accounting, or when calculating changes in area.

How do I search for a specific unit?

Type part of the unit name or abbreviation into the search box above each dropdown. For example, type acre to filter the list to all units that include the word acre. The dropdown will show only the matching units.

What is the difference between American and British spelling?

The only difference is how unit names are spelled. American spelling uses meter, and British spelling uses metre. The math and conversion factors stay exactly the same.

What is a barn in area measurement?

A barn is an extremely small area unit used in nuclear and particle physics. It equals 10-28 square meters. Scientists use it to describe the cross-sectional area of atomic nuclei. Despite its tiny size, the name comes from the joke that a nucleus is "as big as a barn" compared to other subatomic targets.

What is the difference between an acre and a hectare?

An acre is an imperial unit equal to 43,560 square feet. A hectare is a metric unit equal to 10,000 square meters. One hectare is about 2.471 acres. Acres are common in the United States and the United Kingdom, while hectares are used in most other countries.

What is the difference between a survey foot and a standard foot?

A standard foot is defined as exactly 0.3048 meters. A U.S. survey foot is defined as 1200/3937 meters, which is about 0.30480061 meters. The difference is tiny but matters for large land surveys. This calculator includes both square foot types so you can choose the right one.

What should I do if my unit is not listed?

Try searching for it by name or abbreviation using the search box. If the unit is still not listed, you can convert manually. Find how many square meters equal one of your unit, then use square meters as a bridge to convert to any other unit in the calculator.