Parallelogram Calculator and Solver
Easy to use online calculators to calculate the Area Ar, sides, diagonals, height and angles of a parallelogram. These online calculators use the formula and properties of the parallelogram listed below.
Area Ar of a parallelogram may be calculated using different formulas.
Ar = b × h = a × b sin(A) = a × b sin(B)
height: h = a sin(B)
Diagonals BD and AC (using law of cosine)
AC2 = a2 + b2 - 2 a b cos(B)
BD2 = a2 + b2 - 2 a b cos(A) = a2 + b2 + 2 a b cos(B)
Internal angles
size of angle A = size of angle C , size of angle B = size of angle D
size of angle A + size of angle B = 180 ° (supplementary angles)
1 - Use Parallelogram Calculator Given sides a, b and angle A
Enter the sides a, b and angle A as positive real numbers and press "Calculate". The outputs are the area, the height, angle B and diagonals of the parallelogram.
2 - Use Parallelogram Calculator Given sides a, b and height h
Enter the sides a, b and height h as positive real numbers and press "Calculate". The outputs are the area, angleA, angle B and diagonals of the parallelogram.
3 - Use Parallelogram Calculator Given Area Ar, side a and height h
Enter the Area Ar, side a, and height h as positive real numbers and press "Calculate". The outputs are side b, angleA, angle B and diagonals of the parallelogram.
4 - Use Parallelogram Calculator Given diagonals AC and BD and side a
Enter the the diagonals and side as positive real numbers and press "Calculate". The outputs are side b, angleA, angle B, Area Ar and height h of the parallelogram.
More References and Links
parallelogramParallelogram Problems
Online Geometry Calculators and Solvers .
