What does "person-day" mean?

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

What is a synonym for "person-day"?

Common synonyms include: man-day.

Person-day

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
One person's working time for a day, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.
"Holonyms: person-month, man-month < person-year, man-year"

Synonyms

All synonyms

man-day

Example

More examples

"Holonyms: person-month, man-month < person-year, man-year"

Etymology

Compound of person + day, 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 days = X × Y = Z person-days.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.