Which functions are supported?
Standard JavaScript math functions (sin, cos, tan, exp, log, sqrt, etc.) are supported. Use ** for powers or write expressions like x^2 which are automatically converted.
Step-by-step walkthrough
Integral Calculator Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- integral
- definite integral
- antiderivative
Detailed procedure
Step 1
Enter the function f(x) using x as the variable (sin, cos, log, exp, etc. are supported).
Step 2
Choose definite mode to supply lower and upper bounds, or indefinite mode to evaluate F(x) at a point.
Step 3
Review the approximation plus any helpful context such as the evaluation point or bounds.
Teaching & troubleshooting tips
How accurate is the result?
Simpson’s rule converges quickly for smooth functions. Increase precision by rewriting the function if it has discontinuities at the bounds.