# Area Unit Conversion Calculators

To convert a unit of area to another, metric or imperial, choose a unit to convert from.

## What is Area

Area measurements indicate the total size of a 2 dimensional shape. Put another way, area is the amount of space within the boundaries of 2 dimensional shapes, such as a rectangle or square. When finding area, it is crucial to use the same unit of measure for all measurements. Area measurements are commonly used for construction material estimates and to identify property sizes. Find out more area formulas at Coolmath.com

## Common Area Formulas

Area is commonly found by multiplying the length of a space by the width of a space. That assumes that the space is square or rectangular. Calculating the area of a border involves subtracting the area of the inner space from the area of the outer space to find the remaining area of the border. Finding the area of a circle or triangle requires a different formula altogether. Check out the formulas below to find out how to calculate the area of a shape. Check out our square footage calculator to find the square footage of an area.

### Square

area = length x width

### Rectangle

area = length x width

### Rectangular Border

outside area = length x width inside area = (length - (2 x border)) x (width - (2 x border)) border area = outside area - inside area

### Circle

area = pi x (diameter / 2)2 pi = 3.14159265359

### Triangle

area = (1/4) x
(a+b+c) x (b+c-a) x (c+a-b) x (a+b-c)

## Units of Area Measurement

Units of area include acres, square miles, square yards, square feet, square inches, square kilometers, square meters, square centimeters, and square millimeters.

## Common Area Measurement Conversions

Square Feet to Square Yards Area Conversion
1 square foot is equal to 0.111111 square yards
Square Yards to Square Feet Area Conversion
1 square yard is equal to 9 square feet
Square Feet to Square Meters Area Conversion
1 square foot is equal to 0.092903 square meters
Square Meters to Square Feet Area Conversion
1 square meter is equal to 10.76391 square feet
Square Kilometers to Square Miles Area Conversion
1 square kilometer is equal to 0.386102 square miles
Square Miles to Square Kilometers Area Conversion
1 square mile is equal to 2.589988 square kilometers
Square Centimeters to Square Inches Area Conversion
1 square centimeter is equal to 0.155 square inches

## Area Unit Conversion Table

Equivalent area metric and imperial measurements
Acre Square Mile Square Yard Square Foot Square Inch Square Kilometer Square Meter Square Centimeter Square Millimeter
1 acre = 1 0.001562 4,840 43,560 6,272,592 0.004047 4,047 40,468,253 4,046,825,252
1 square mile = 640.004929 1 3,097,600 27,878,400 4,014,489,599 2.589988 2,589,988 25,899,881,100 2,589,988,110,000
1 square yard = 0.000207 0.00000032283 1 9 1,296 0.00000083613 0.836127 8,361 836,127
1 square foot = 0.000022957 0.00000003587 0.111111 1 144 0.000000092903 0.092903 929.0304 92,903
1 square inch = 0.00000015942 0.0000000002491 0.000772 0.006944 1 0.00000000064516 0.000645 6.4516 645.16
1 square kilometer = 247.107285 0.386102 1,195,990 10,763,910 1,550,003,100 1 1,000,000 10,000,000,000 1,000,000,000,000
1 square meter = 0.000247 0.0000003861 1.19599 10.76391 1,550 0.0000010 1 10,000 1,000,000
1 square centimeter = 0.000000024711 0.00000000003861 0.00012 0.001076 0.155 0.00000000010 0.0001 1 100
1 square millimeter = 0.00000000024711 0.0000000000003861 0.000001196 0.000010764 0.00155 0.0000000000010 0.0000010 0.01 1