In humans, nails grow at an average rate of ______ a month:
In humans, nails grow at an average rate of 3 mm (0.12 in) a month. Fingernails require three to six months to regrow completely, and toenails require twelve to eighteen months. Actual growth rate is dependent upon age, sex, season, exercise level, diet, and hereditary factors. Nails grow faster in the summer than they do in the winter.
1 mm
3 mm
5 mm
7 mm
Disorders of nail