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Heron's formula calculator This calculator calculates the area of a triangle using Heron's formula. This formula gives the area of a triangle from the lengths of all three sides. The formula can be found below the calculator. |

Area of triangle by coordinates This calculator determines the area of a triangle using its vertex coordinates in the cartesian coordinate system. |

Conversion between imperial and metric units of area These calculators convert imperial to metric and metric to imperial units of area |

Regular polygon area from circumcircle Calculates the area of the circumcircle and of the regular polygon from radius of circumcircle and number of sides |

Circle formulas Circle formulas |

Area of a convex quadrilateral. Example of creating a calculator. This online calculator calculates area of a convex quadrilateral given diagonal values and value of angle between them. Article also describes the process of creating a calculator. |

Price based on running meter This online calculator calculates the price of certain area based on price of running or linear meter |

Counting pipes from the end face The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request |

Hip roof calculator This calculator will help you estimate hip roof parameters, including rafters and roof area |

Circular sector Calculates area, arc length, perimeter, and center of mass of circular sector |

Circular segment Here you can find the set of calculators related to circular segment: segment area calculator, arc length calculator, chord length calculator, height and perimeter of circular segment by radius and angle calculator. |

Polygon area An online calculator calculates a polygon area, given lengths of polygon sides and diagonals, which split polygon to non-overlapping triangles. |

Number of flagstones for paving This calculator will help you to estimates number of flagstones needed for paving |

Number of flagstones to units of area and vice versa These calculators convert entered number of flagstones to area size and vice versa - calculate number of flagstones needed to cover entered ara size. Metric and imperial units are supported |

Pressure over a surface This online calculator computes pressure, cause by given mass over given surface in gravity field. Result is displayed using different units of pressure |

Display aspect ratio and dimensions This online calculator finds screen dimensions - height, width and area, given the diagonal value and aspect ratio. |

Pipe cold bending. Flexure depth with the main shaft. Calculates the section flexure depth with pipe bender or bending machine to obtain given parameters. |

Area of an irregular quadrangle with the given sides Calculates an area of an irregular quadrangle with the given sides |

Side of regular polygon from polygon area Calculates the side length of regular polygon given the area of the regular polygon and number of sides |

Area expression with different units Calculator expresses the given area through the different units of area measurement. |