Jacques Inaudi (October 15, 1867 – November 10, 1950) was an Italian calculating prodigy.
He was born in Onorato, Piedmont, Italy. As a child he was a shepherd but showed aptitude for mental calculations. Inaudi's abilities attracted interest of showmen and he toured around the world.
French scientists like Jean-Martin Charcot investigated his abilities, French astronomer Camille Flammarion praised him in strong terms, and Alfred Binet wrote a book on him. Inaudi would repeat the numbers he was given before he began his mental calculations.