Math Calculators, Lessons and Formulas

It is time to solve your math problem

Rectangle calculator

An online calculator that calculates the side, area, perimeter and diagonal of a rectangle if you enter two known values. Step-by-step explanations for each combination of input parameters are provided.

Rectangle Calculator
Input value you know and select what to compute.( show help ↓↓ )
I want to calculate:
view examples ↓↓
Input two elements of a rectangle:
side $ a $
side $ b $
area $ A $
perimeter $ P $
diagonal $ d $
example 1:ex 1:
Find the area of the rectangle whose sides are $14cm$ and $31 cm$.
example 2:ex 2:
Finding the area of a rectangle whose diagonal is $9 cm$ and one side is $5 cm$.
example 3:ex 3:
The area of a rectangle is $56 cm^2$ and one side is $6 cm$. Find perimeter.

Quick Calculator Search

Was this calculator helpful?

Yes No
165 495 500 solved problems