How to Convert Fortnights to Weeks (fn to wk)
Time conversions help with project planning, payroll hours and working out how long a loan or COE period really is. This guide shows how to convert fortnights into weeks by hand, with examples and a quick-reference table.
The conversion
To convert fortnights to weeks, multiply the value by 2. To go the other way, divide by the same number (or multiply by 0.5). For a quick estimate, multiply by about 2.
Weeks = fortnights × 2
Worked examples
- 3 fn = 6 wk
- 12.5 fn = 25 wk
- 75 fn = 150 wk
Fortnights to Weeks table
| Fortnights | Weeks |
|---|---|
| 1 fn | 2 wk |
| 2 fn | 4 wk |
| 5 fn | 10 wk |
| 10 fn | 20 wk |
| 20 fn | 40 wk |
| 25 fn | 50 wk |
| 50 fn | 100 wk |
| 100 fn | 200 wk |
| 250 fn | 500 wk |
| 500 fn | 1,000 wk |
| 1,000 fn | 2,000 wk |
Common questions
Is fn to wk exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Weeks to Fortnights converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
For any value, use the Fortnights to Weeks Converter or browse all time converters.
Run your own numbers: Fortnights to Weeks Converter