At gCalcD.com we have focused on developing the best **calculators** for online use.

Our **Online Graphing Calculator**, is unique! Unlike other graphing calculators it doesn't just display graphs out of the blue. Instead, it is both a polar graph animator and parametric graph animator that lets you see how **polar graphs of functions** and **Cartesian and polar graphs of parametric equations** are *constructed* from start to end.

In addition, you can use it as an equation solver to find the **roots of a function**, which are the **x-intercepts** of its Cartesian **graph**.

You can use this graphing calculator to graph equations with variables in both sides.

It is also a derivative graphing calculator that lets you calculate derivatives of functions and parametric curves and graph them instantly.

Other unique feature of the *gCalcD* **Graphing Calculator** is that it allows **rotation of axis**. You can then see the graphs in **non-orthogonal** Cartesian coordinate systems.

Our **Online Matrix Calculator** is also unique! It is also a Complex Matrix Calculator, where the matrix elements can be complex numbers in any form — standard, polar and even expressions containing them! You can calculate matrices up to 100 × 100 and larger.

Furthermore, the *gCalcD* **matrix calculator** is also a Matrix Expression Calculator. You can enter and calculate matrix expressions containing up to *eight* matrices.

With our **Online Derivative Calculator**, which is also a Partial Derivative Calculator, you can calculate **partial derivatives** of multivariable functions in addition to ordinary derivatives of one variable functions.

Our **Online Complex Number Calculator** not only accepts **complex numbers** in any form but also displays the result of a calculation in all forms — standard, polar, exponential.

This complex number calculator is also a Scientific Calculator, it calculates any mathematical expression containing **Real** or **complex numbers** and optionally shows the steps to the results.