# Integral Approximation Calculator

Use this tool to find the **approximate** area from a curve to the x axis.

Read Integral Approximations to learn more.

Note: use your eyes and common sense when using this! Some curves don't work well, for example tan(x), 1/x near 0, and functions with sharp changes give bad results.

## Plus and Minus

Note also that when the curve is below the axis the area is negative.