Hair Growth Rate: How Much Does Hair Grow Per Day?

On average, hair grows about 0.5 inches (1.25 cm) per month, which works out to roughly 0.017 inches (0.044 mm) per day.

Therefore, in two days, hair would grow approximately 0.034 inches (0.088 mm).

This is a very small amount and likely not noticeable to the naked eye.