Integral Calculator
Compute definite integrals of polynomial functions with step-by-step explanation.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Integral Calculator
- Enter the function in the f(x) field. Use standard polynomial notation, e.g.,
3x^2+2x+1. Supported: coefficients (decimals allowed), exponents with^, and+/-signs. - Set the limits: Enter the lower limit a and upper limit b (numeric values only). The upper limit must be greater than the lower limit.
- Click “Calculate Integral” to compute the definite integral.
- Read the result displayed as a decimal number (rounded to 6 decimal places). Below it, you’ll see step-by-step antiderivative calculations and evaluation at the limits.
- If an error occurs (e.g., invalid input or limits), a red message will appear. Correct the input and try again.
Note: This calculator works only with polynomial functions (e.g., 2x^3 - 5x + 7). It does not support trigonometric, exponential, or other non-polynomial terms.
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Frequently Asked Questions
Currently, it supports polynomial functions (e.g., 3x^2+2x+1).
Use standard notation: 3x^2+2x+1. Use 'x' as variable, '^' for exponent. For example, x^3 - 2x + 5.
Check that your function is entered correctly and that the lower limit is less than the upper limit. Only numeric inputs are allowed.
