What is Avogadro's number? What is Avogadro's number? Avogadro’s number is 8.31, which equals the number of items in one mole. Avogadro’s number is 1.60×1019, which equals the number of items in one mole. Avogadro’s number is 1.38×1023, which equals the number of items in one mole. Avogadro’s number is 6.02×1023, which equals the number of items in one mole.