area code - numbering plan to classify each region in a calling area

Annulus

Free Annulus Calculator - Calculates the area of an annulus and the equation of the annulus using the radius of the large and small concentric circles.

Arc Length and Area of a Sector of a Circle

Free Arc Length and Area of a Sector of a Circle Calculator - Calculates the arc length of a circle and the area of the sector of a circle

Area Conversions

Free Area Conversions Calculator - This calculator converts between the following area measurements:

acre

hectare

square inch

square foot

square yard

square mile

square millimeter

square meter

square kilometer

acre

hectare

square inch

square foot

square yard

square mile

square millimeter

square meter

square kilometer

Body Mass Index (BMI)

Free Body Mass Index (BMI) Calculator - Solves for the popular health measurement of Body Mass Index or Weight using inches and pounds input or meters and kilos input.

Also calculates the estimated surface area of the body using the Mosteller Formula

Also calculates the estimated surface area of the body using the Mosteller Formula

Bretschneiders Formula

Free Bretschneiders Formula Calculator - Calculates the area of a quadrilateral using Bretschneiders Formula

Cardioid

Free Cardioid Calculator - Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid

Circles

Free Circles Calculator - Calculates and solves for Radius, Diameter, Circumference, and Area of a Circle.

Cones

Free Cones Calculator - Calculates and solves for Radius, height, Volume (Capacity), Lateral Area, and Surface Area of a Cone.

Cube

Free Cube Calculator - Solves for Volume (Capacity), Lateral Area,Surface Area, and the value of a side for a cube.

Cuboid

Free Cuboid Calculator - Calculates the volume, surface area, diagonals, and space diagonal for a cuboid

Cylinders

Free Cylinders Calculator - Calculates and solves for Radius, Diameter, Volume (Capacity), Lateral Area, and Surface Area of a Cylinder.

Decagon

Free Decagon Calculator - Solves for the side, perimeter, and area of a decagon.

Dewey Decimal System Classification

Free Dewey Decimal System Classification Calculator - Given a 3 digit code, this will determine the class, division, and section of the library book using the Dewey Decimal System.

Equilateral Triangle

Free Equilateral Triangle Calculator - Given a side (a), this calculates the following items of the equilateral triangle:

* Perimeter (P)

* Semi-Perimeter (s)

* Area (A)

* altitudes (h_{a},h_{b},h_{c})

* medians (m_{a},m_{b},m_{c})

* angle bisectors (t_{a},t_{b},t_{c})

* Circumscribed Circle Radius (R)

* Inscribed Circle Radius (r)

* Perimeter (P)

* Semi-Perimeter (s)

* Area (A)

* altitudes (h

* medians (m

* angle bisectors (t

* Circumscribed Circle Radius (R)

* Inscribed Circle Radius (r)

Euclidean Geometry

Free Euclidean Geometry Calculator - Shows you the area, arc length, polar equation of the horizontal cardioid, and the polar equation of the vertical cardioid

Hemisphere

Free Hemisphere Calculator - Calculates the base circumference, volume, curved surface area, base surface area, total surface area of a hemisphere with radius r

Heptagon

Free Heptagon Calculator - Solves for side length, perimeter, and area of a heptagon.

Hexagon

Free Hexagon Calculator - This calculator solves for side length (s), Area (A), and Perimeter (P) of a hexagon given one of the 3 entries.

Isosceles Triangle

Free Isosceles Triangle Calculator - Given a long side (a) and a short side (b), this determines the following items of the isosceles triangle:

* Area (A)

* Semi-Perimeter (s)

* Altitude a (ha)

* Altitude b (hb)

* Altitude c (hc)

* Area (A)

* Semi-Perimeter (s)

* Altitude a (ha)

* Altitude b (hb)

* Altitude c (hc)

Kites

Free Kites Calculator - This calculates perimeter and/or area of a kite given certain inputs such as short and long side, short and long diagonal, or angle between short and long side

Morse Code Translator

Free Morse Code Translator Calculator - Given a phrase with letters, numbers, and most punctuation symbols, the calculator will perform the following duties:

1) Translate that phrase to Morse Code.

2) Translate the Morse Code to a Dit-Dah message

3) Calculate the number of dots in the message

4) Calculate the number of dashes in the message

This also translates__from__ Morse Code back to English.

1) Translate that phrase to Morse Code.

2) Translate the Morse Code to a Dit-Dah message

3) Calculate the number of dots in the message

4) Calculate the number of dashes in the message

This also translates

Nonagon

Free Nonagon Calculator - Calculates the side, perimeter, and area of a nonagon

Octagon

Free Octagon Calculator - Calculate side, area, and perimeter of an octagon based on inputs

Pentagons

Free Pentagons Calculator - Given a side length and an apothem, this calculates the perimeter and area of the pentagon.

Pick's Theorem

Free Pick's Theorem Calculator - This calculator determines the area of a simple polygon using interior points and boundary points using Pick's Theorem

Polygons

Free Polygons Calculator - Using various input scenarios of a polygon such as side length, number of sides, apothem, and radius, this calculator determines Perimeter or a polygon and Area of the polygon.
This also determines interior angles of a polygon and diagonals of a polygon as well as the total number of 1 vertex diagonals.

Pyramids

Free Pyramids Calculator - Solves for Volume (Capacity), Surface Area, height, or radius of a Pyramid.

Quadrilateral

Free Quadrilateral Calculator - Given 4 points entered, this determines the area using Brahmaguptas Formula and perimeter of the quadrilateral formed by the points as well as checking to see if the quadrilateral (quadrangle) is a parallelogram.

Rectangle Word Problem

Free Rectangle Word Problem Calculator - Solves word problems based on area or perimeter and variable side lengths

Rectangles and Parallelograms

Free Rectangles and Parallelograms Calculator - Solve for Area, Perimeter, length, and width of a rectangle or parallelogram and also calculates the diagonal length as well as the circumradius and inradius.

Rectangular Solid

Free Rectangular Solid Calculator - Solves for Volume (Capacity) of rectangular solid

Lateral Area of rectangular Solid

Surface Area of rectangular solid.

Lateral Area of rectangular Solid

Surface Area of rectangular solid.

Rhombus

Free Rhombus Calculator - Given inputs of a rhombus, this calculates the following:

Perimeter of a Rhombus

Area of a Rhombus

Side of a Rhombus

Perimeter of a Rhombus

Area of a Rhombus

Side of a Rhombus

Spheres

Free Spheres Calculator - Calculates and solves for Volume (Capacity), Surface Area, and Radius of a Sphere.

Squares

Free Squares Calculator - Solve for Area of a square, Perimeter of a square, side of a square, diagonal of a square.

Stress

Free Stress Calculator - Solves for any of the 3 items in the stress formula: Stress, Force, and Area

Torus

Free Torus Calculator - Calculates the volume of a torus and surface area of a torus given major radius and minor radius.

Trapezoids

Free Trapezoids Calculator - This calculator determines the following items for a trapezoid based on given inputs:

* Area of trapezoid

* Perimeter of a Trapezoid

* Area of trapezoid

* Perimeter of a Trapezoid

Triangle Coordinate Items

Free Triangle Coordinate Items Calculator - Enter 3 points for the vertices of a triangle, and this will calculate the area of that triangle and the centroid.

Triangle Solver and Classify Triangles

Free Triangle Solver and Classify Triangles Calculator - Solves a triangle including area using the following solving methods

Side-Angle-Side (SAS) Side Angle Side

Angle-Side-Angle (ASA) Angle Side Angle

Side-Side-Angle (SSA) Side Angle Side

Side-Side-Side (SSS) Side Side Side

Area (A) is solved using Herons Formula

Law of Sines

Law of Cosines

Also classifies triangles based on sides and angles entered.

Side-Angle-Side (SAS) Side Angle Side

Angle-Side-Angle (ASA) Angle Side Angle

Side-Side-Angle (SSA) Side Angle Side

Side-Side-Side (SSS) Side Side Side

Area (A) is solved using Herons Formula

Law of Sines

Law of Cosines

Also classifies triangles based on sides and angles entered.