# Calculate the Area of a Triangle

This will calculate the area of a triangle based on the length of its sides.

Triangle Area - 3′ x 4′ x 5′

6 | square feet |

864 | square inches |

0.66667 | square yards |

0.55742 | square meters |

5,574.2 | square centimeters |

(results may be rounded)

#### Area of a Triangle Formula

The area of a triangle, knowing its three sides, is expressed by Heron's formula:

In this formula, a, b, and c represent the lengths of the three sides. s represents the "semiperimeter" or half the perimeter:

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Browse by Side Length in Meters