TutorVista.com offers a calculator for finding the x- and y-intercepts of linear functions. MathPortal.org provides a tool for quadratic functions that not only finds the intercepts but also plots the function and calculates the vertex and focus.
Symbolab.com makes available a sophisticated calculator. Users may input any function, be it linear, exponential, logarithmic, trigonometric or otherwise, and it calculates the x- and y-intercepts along with the domain of the function.
Mathway.com provides a similar tool. To use it, input the function and a drop-down menu appears. Select the appropriate item from the drop-down to find the x- and y- intercepts.
Exercise caution when using online calculator resources and always independently confirm results to ensure accuracy.