Fresnel integral calculator

How to use this calculator

Edit FresnelS(1), or use FresnelC for the cosine integral. The normalization uses pi times t squared divided by 2.

Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.

Try it here

Interactive tools require JavaScript. You can read the guide and example without it.

What to know

Some references omit the pi/2 normalization. Compare definitions before comparing numerical answers.

Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.