Toenails and fingernails grow 1.62 millimeters per month and 3.47 millimeters per month, respectively. If you lose a fingernail due to any reason, it may take four to six months for it to regrow. However, the toenails grow slowly, so it may take up to one and a half years to grow out ultimately. If your nails are strong and growing faster, you should be happy that you are completely healthy. The faster growth of nails is also reliant on age, location, gender, and hormones.