Russia, with 7,000 nuclear warheads, and the US, with 6,800 warheads, together hold an estimated 93% of the world's nuclear arsenal, according to the Federation of American Scientists (FAS). Other countries like France, China, and the UK account for 300, 270 and 215 nuclear warheads respectively. While Pakistan has a warhead stockpile of 120-130, India's warheads range between 110-120.