Week to Fortnight Converter
Convert Week (wk) to Fortnight (fn) instantly. 1 wk = 0.5 fn.
Time Converter
21 units available
1 wk = 0.5 fn
Formula:
fn = wk × 0.5With your value: 1 wk = 0.5 fn
How big is that?
Everyday references on a logarithmic scale, all expressed in week so you can sanity-check the result.
Other Week to Fortnight conversions
Week to Fortnight Conversion Table
| Week (wk) | Fortnight (fn) |
|---|---|
| 0.5 | 0.25 |
| 1 | 0.5 |
| 2 | 1 |
| 5 | 2.5 |
| 10 | 5 |
| 15 | 7.5 |
| 20 | 10 |
| 25 | 12.5 |
| 50 | 25 |
| 100 | 50 |
| 250 | 125 |
| 500 | 250 |
| 1000 | 500 |
Fortnight to Week Conversion Table
| Fortnight (fn) | Week (wk) |
|---|---|
| 0.5 | 1 |
| 1 | 2 |
| 2 | 4 |
| 5 | 10 |
| 10 | 20 |
| 15 | 30 |
| 20 | 40 |
| 25 | 50 |
| 50 | 100 |
| 100 | 200 |
| 250 | 500 |
| 500 | 1,000 |
| 1000 | 2,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Week (wk)
Time
Traceable to the second, defined by fixing the caesium-133 hyperfine transition frequency at 9 192 631 770 Hz.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Fortnight (fn)
Time
Traceable to the second, defined by fixing the caesium-133 hyperfine transition frequency at 9 192 631 770 Hz.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Week to Fortnight
To convert from Week (wk) to Fortnight (fn), multiply the value by 0.5.
Formula: fn = wk × 0.5
Reverse: wk = fn × 2
Step-by-Step Example
- Start with your value in Week. For example: 5 wk
- Multiply by the conversion factor: 5 x 0.5
- The result is: 2.5 fn
About Week
The week (wk) is a unit of time. One week equals 604800 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: time calculations, engineering and science, education.
About Fortnight
The fortnight (fn) is a unit of time. One fortnight equals 1.209600 × 10^+6 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: time calculations, engineering and science, education.
Frequently Asked Questions
How many Fortnight are in 1 Week?
There are exactly 0.5 Fortnight in 1 Week. This means the conversion factor from Week to Fortnight is 0.5.
What is the formula to convert Week to Fortnight?
The formula to convert Week to Fortnight is: fn = wk × 0.5. For example, to convert 10 Week to Fortnight, you would multiply 10 by 0.5.
What is a Week?
The week (wk) is a unit of time. One week equals 604800 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Fortnight?
The fortnight (fn) is a unit of time. One fortnight equals 1.209600 × 10^+6 seconds. UnitConvertLab converts it against every other time unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Week?
The Week is commonly used in time calculations, engineering and science, education.
Related Time Conversions
Cite this page
UnitConvertLab. (2026). Week to Fortnight converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/week-to-fortnight