Fortnight Converter

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Fortnight vs All Time Units Comparison Chart

Source - Fortnight

Fortnight (fn) - Definition and Overview

What is Fortnight?

A fortnight is equal to 14 days, or 2 weeks. It is commonly used in the US, the UK, and a few other countries traditionally utilizing the Imperial system of measurement.

Summary

  • A fortnight is a unit of time equal to 14 days or two weeks
  • It is commonly used in some English-speaking countries to measure periods of time that are longer than a week but shorter than a month
  • The term "fortnight" is derived from the Old English word "feowertyne niht," meaning "fourteen nights."

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: September 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.