Fingernails grow at an average rate of about 3.47 millimeters per month, which is roughly 0.1 millimeters per day. Toenails grow more slowly, at about 1.62 millimeters per month

. It typically takes about 4 to 6 months for a fingernail to completely regrow after loss or damage, while toenails can take much longer-between 9 and 18 months for full regrowth

. Several factors influence nail growth speed, including:

• Age: Nail growth tends to slow with age

• Season: Nails grow faster in summer due to increased circulation

• Hand dominance: Nails on the dominant hand grow faster

• Nutrition and health: Adequate vitamins and good overall health promote growth

• Trauma or damage: Nails may grow faster after injury or biting due to stimulated circulation

In summary, nails grow slowly but steadily, with fingernails taking a few months to fully grow out and toenails requiring up to a year or more for complete regrowth depending on individual factors