Fortnight Calculator — Add or Subtract 14 Days

This fortnight calculator moves a date forward or back in fourteen-day steps. Because a fortnight is a whole number of weeks, the weekday never changes — a fortnight from a Tuesday is always a Tuesday, which is exactly what makes the unit convenient for anything recurring.

The conversions

One fortnight is 2 weeks, 14 days or 336 hours. Multiples follow directly, and the strip beneath the calculator shows them for whatever number you enter. More worked examples in converting fortnights to weeks and days.

Why the weekday never moves

Fourteen is divisible by seven, so every fortnight lands on the same day of the week. Months do not have this property, which is why a fortnightly meeting stays on Tuesdays while a monthly one wanders — see fortnightly meeting cadence.

Guides about Fortnight Calculator

Questions answered Converting Fortnights to Weeks and Days: Every Conversion One fortnight is two weeks, fourteen days or 336 hours. Here are all the conversions, plus worked examples of adding and subtracting across month ends. 5 min read Questions answered Fortnightly Rent and Leases: Converting It Properly Doubling a fortnightly figure to get a monthly one understates rent by nearly 8 per cent. Here is the correct conversion, in both directions, with examples. 5 min read

More fortnight.now pages

This Fortnight The current fortnight of the year, the day within it, and when the next one starts. Pay Period Dates Enter one known pay date and get every fortnightly pay date for that year — including the 27th when it happens. Fortnight Countdown How many fortnights until a date — a friendlier unit than a long day count.

Frequently asked questions

What date is a fortnight from today?

Enter today's date above and add one fortnight. The result is fourteen days later on the same weekday.

How many hours are in a fortnight?

336 hours — 14 days of 24 hours each, ignoring any daylight saving change within the period.

Does the weekday change?

No. A fortnight is exactly two weeks, so the weekday is always the same as the starting date's.