This page converts fortnights into quarters using the factor 0.1533196441, and shows the reverse figure alongside it. Both units measure time, which is why one number does the whole job.
Fourteen days, still the standard pay and rent period in the UK and Australia. Three average months, 91.31 days — the reporting period of business.
Months and years are not fixed. This page uses the average Gregorian month of 30.44 days and the Julian year of 365.25 days, which is right for durations and wrong for calendars: three months from 31 January is not 91.31 days in any useful sense. Use a date calculator for calendar arithmetic. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in quarters, so you can sanity-check whether your answer is a plausible size.
The formula
fortnights- The amount you are converting, in fortnights
0.153319644079- The exact number of quarters in one fortnight
quarters- The converted result
How it works, step by step
- Enter the value in fortnights.
- It is multiplied by 0.153319644079, the exact factor between the two units.
- The answer is shown in quarters, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A mortgage term: 626 fn in quarters
At 626 fn (a mortgage term), the same quantity in quarters is 626 × 0.15332 = 95.9781 qtr. One fortnight is 0.15332 quarters, so the numbers shrink as expected.
A pregnancy: 20 fn in quarters
A pregnancy comes to about 20 fn. Multiplying by the factor: 20 × 0.15332 = 3.06639 qtr. Dividing the answer back by 0.15332 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many quarters are in one fortnight?
Exactly 0.153319644079. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert fortnights to quarters?
quarters = fortnights × 0.153319644079. Reversed, fortnights = quarters ÷ 0.153319644079, which is the same as multiplying by 6.52232142857.
Which is the bigger unit, the fortnight or the quarter?
The quarter. One fortnight is only 0.15332 of a quarter, so it takes 6.52232 fortnights to make one quarter.
What does this quantity actually measure?
Both units measure time. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a fortnight?
Fourteen days, still the standard pay and rent period in the UK and Australia.
What is a quarter?
Three average months, 91.31 days — the reporting period of business.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do fn to qtr in my head?
Plenty of people do this in their head: divide by 6.5 instead of using the exact factor 0.1533196441. At 100 that shortcut gives 15.384615 quarters, off by 0.05265 quarters or about 0.34%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Fortnights to quarters reference tables
| Fortnights | Quarters |
|---|---|
| 0.5 fn | 0.0766598 qtr |
| 1 fn | 0.15332 qtr |
| 2 fn | 0.306639 qtr |
| 3 fn | 0.459959 qtr |
| 5 fn | 0.766598 qtr |
| 10 fn | 1.5332 qtr |
| 20 fn | 3.06639 qtr |
| 25 fn | 3.83299 qtr |
| 50 fn | 7.66598 qtr |
| 75 fn | 11.499 qtr |
| 100 fn | 15.332 qtr |
| 250 fn | 38.3299 qtr |
| 500 fn | 76.6598 qtr |
| 1000 fn | 153.32 qtr |
| 5000 fn | 766.598 qtr |
Exact factor: 1 fortnight = 0.153319644079 quarters.
| Quantity | fn | qtr |
|---|---|---|
| A camera flash | 8.267e-10 fn | 1.268e-10 qtr |
| A heartbeat | 7.085e-07 fn | 1.086e-07 qtr |
| A pop song | 0.0001736 fn | 2.662e-05 qtr |
| A working day | 0.02381 fn | 0.00365 qtr |
| A pregnancy | 20 fn | 3.066 qtr |
| A mortgage term | 626.1 fn | 96 qtr |
Published reference values, converted with the same factor this page uses.