Fortnight (fn) - Unit Information & Conversion

Symbol:fn
Plural:fortnights
Category:Time

What is a Fortnight?

Definition

A fortnight is a unit of time equal to exactly two weeks, which corresponds to 14 days or 336 hours.

History

The word "fortnight" originates from the Old English term "fēowertīene niht," meaning "fourteen nights." Counting periods by nights was common among ancient Germanic peoples. The term has been in continuous use in English for centuries and remains relatively common in the United Kingdom, Ireland, Australia, New Zealand, and some other Commonwealth countries, although its usage has declined somewhat in favor of "two weeks," especially in North America.

Common Uses

  • Scheduling: Used in some regions for scheduling events, meetings, or appointments that occur every two weeks.
  • Payroll: Some companies, particularly in the UK and Australia, operate on a fortnightly pay cycle (paid every two weeks).
  • Publications: Certain magazines or journals might be published fortnightly (bi-weekly).
  • General Conversation: Used informally in regions where the term is common to refer to a two-week period (e.g., "I'm going on holiday for a fortnight").
  • Literary/Formal Contexts: Sometimes used in literature or more formal writing for stylistic reasons or historical accuracy.

Unit FAQs

How many days are in a fortnight?

A fortnight consists of exactly 14 days (or 336 hours).

How many weeks make a fortnight?

A fortnight is equal to exactly 2 weeks.

Where does the word "fortnight" come from?

It originates from the Old English phrase "fēowertīene niht," which literally translates to "fourteen nights," reflecting an old practice of counting periods of time by the number of nights.

Is "fortnight" commonly used everywhere?

No, its usage varies significantly by region. It remains relatively common in everyday language in the United Kingdom, Ireland, Australia, New Zealand, and some other Commonwealth countries. However, in North America and many other parts of the world, the term "two weeks" is far more prevalent.

Fortnight Conversion Formulas

To Second:

1 fn = 1209600 s
Example: 5 fortnights = 6048000 seconds

To Minute:

1 fn = 20160 min
Example: 5 fortnights = 100800 minutes

To Hour:

1 fn = 336 h
Example: 5 fortnights = 1680 hours

To Day:

1 fn = 14 d
Example: 5 fortnights = 70 days

To Week:

1 fn = 2 wk
Example: 5 fortnights = 10 weeks

To Month:

1 fn = 0.459968 mo
Example: 5 fortnights = 2.299842 months

To Year:

1 fn = 0.038331 yr
Example: 5 fortnights = 0.191653 years

To Millisecond:

1 fn = 1209600000 ms
Example: 5 fortnights = 6048000000 milliseconds

To Microsecond:

1 fn = 1209600000000 μs
Example: 5 fortnights = 6048000000000 microseconds

To Nanosecond:

1 fn = 1209600000000000 ns
Example: 5 fortnights = 6048000000000000 nanoseconds

To Decade:

1 fn = 0.003833 dec
Example: 5 fortnights = 0.019165 decades

To Century:

1 fn = 0.000383 c
Example: 5 fortnights = 0.001917 centuries

To Millennium:

1 fn = 0.000038 ka
Example: 5 fortnights = 0.000192 millennia

To Planck Time:

1 fn = 2.243739565943239e+49 tP
Example: 5 fortnights = 1.1218697829716193e+50 Planck times

To Shake:

1 fn = 120960000000000 shake
Example: 5 fortnights = 604800000000000 shakes

To Sidereal Day:

1 fn = 14.038331 sidereal day
Example: 5 fortnights = 70.191653 sidereal days

To Sidereal Year:

1 fn = 0.038329 sidereal year
Example: 5 fortnights = 0.191646 sidereal years

Convert Fortnight

Need to convert Fortnight to other time units? Use our conversion tool.