Definite Integral Calculator
Calculate the definite integral using Simpson's rule numerical method.
- Free Online Tool
- Instant Results
- Mobile Friendly
- No Installation
- Secure & Private
Understanding This Calculator
Definite Integral (Simpson's Rule)
Approximates the area under the curve y = f(x) from a to b.
∫ from a to b of f(x) dx ≈ (b-a)/6 * [f(a) + 4f((a+b)/2) + f(b)]
Example 1
∫ x dx from 0 to 2
- Exact: [x²/2] from 0 to 2 = 2 - 0 = 2
Example 2
∫ x² dx from 0 to 3
- Exact: [x³/3] from 0 to 3 = 27/3 - 0 = 9
How to Use
- Enter the function f(x).
- Enter lower and upper bounds.
Frequently Asked Questions
How do I use the Definite Integral Calculator?
Enter your values in the input fields, and the result will appear instantly.
Is this calculator free to use?
Yes, this calculator is 100% free and does not require any registration or subscription.
Is it mobile-friendly?
Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.