Online calculators

Our site contains more than 100 free online calculators on math, geometry and physics.

Lessons book

Basic formulas, charts and theorems for those who study. All necessary things to complete homework assignment!

Answers examples

Examples of task solutions on main topics of school and academic courses. Detailed answers with analysis!

Calculating the perimeter of the parallelogram online

Our online calculator calculates the perimeter of the parallelogram through the length of its sides, according to the formula P = 2 (a + b). To compute the perimeter of a parallelogram, enter the length of its two sides (a and b) and press the “To calculate”, calculator will give the answer and the detailed solution!

Enter the data for the calculation of the perimeter
The formula :
a = b =
Solved today:
times, total