# person-year

> English word · Noun

## Definitions
1. One person's working time for a year, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.

## Etymology
Compound of person + year, although, as with any such unit of measure (e.g., ton-miles, newton metres), the mathematical relationship of multiplication is simultaneously involved: X persons working during Y years = X × Y = Z person-years.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/person-year