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The results also showed that fingernails now grow by 3.47mm every month â almost twice as fast as toenails. The nails of younger people and men grow faster. The little finger nail grows much more slowly than other fingernails, at a rate of 3.08mm each month. The middle finger has the fastest-growing nail.
For adults they grow (on average) about 0.02 inches a week (or almost half a millimetre). That works out to 2.3 cm (or 0.9 inches) per year. That's about the same pace that continents move, by the way. If you're thinking that your nails definitely grow more than that -- you're probably right. Young people have faster-growing fingernails than oldies. Fingernails also grow more during the day, in summer, and among people who live in warmest and sunniest climates. Men have faster growing fingernails than women.