Fingernails usually grow faster than toenails: one clinical reference gives approximate rates of about 3 millimeters per month for fingernails and 1 millimeter for toenails. The growth rate varies by person and nail, and scientists do not reduce the difference to one proven cause.
The measured difference
Healthy fingernails generally grow faster than toenails. A study measuring young adults found differences among individual digits, while a clinical review gives approximate rates near 3 millimeters per month for fingernails and 1 millimeter for toenails. These are averages, not a promise for every person. [1][2]
Nails grow from a hidden matrix
New nail plate is produced in the nail matrix beneath the skin at the base of each nail. The visible hard nail is made of compacted keratinized cells. Growth rate can vary with age, health, digit, and other individual factors.
A careful answer to “why”
The difference is well documented, but a single explanation does not account for every person or digit. The measured study found variation by finger and toe; it did not prove one universal reason such as hand use alone. Nail growth is therefore better described as a biological pattern with multiple influences.
Do toenails grow at the same speed as fingernails?
Usually not. Fingernails grow faster on average, and a toenail can take much longer to replace completely.
Sources and evidence
- PubMed — Growth rate of human fingernails and toenails in healthy American young adults ↗
Reports measured growth rates and differences among individual fingernails and toenails.
- NCBI Bookshelf — Histology, Nail ↗
Describes the nail matrix and approximate fingernail and toenail growth rates.
Sources consulted: 15 October 2026. Written with AI assistance and checked against the linked references; not independently reviewed by a subject specialist. Sources do not endorse this article. See our editorial policy.
Revision: Initial publication; the explanation was checked against linked institutional, medical, or scientific references. This article was prepared with AI assistance and has not received independent expert review.