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About this tool
Convert weeks to fortnights instantly. Free, bidirectional, and fully in-browser.
1 week equals 0.5 fortnights — enter any week value to convert it to fortnights instantly. This Week to Fortnight converter is a client-side tool: it applies a single multiplication (fn = wk × 0.5) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert fortnights back to weeks. A reference table lists common week values already converted, and nothing you enter is sent to a server.
Open Week to Fortnight Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Week field.
Read the equivalent in fortnights in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert fortnights to weeks.
The result updates as you type, and the swap button flips the conversion to fortnight → week without reloading.
The conversion uses the precise factor (fn = wk × 0.5), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One week is 0.5 fortnights. Multiply the week value by 0.5 to convert. For example, 10 wk = 5 fn.
fn = wk × 0.5. This tool applies it automatically and shows a worked example: 10 wk = 5 fn.
Yes. Press the swap button, or type into the fortnight field, and the tool converts fortnights to weeks using the inverse of the same relationship.
It uses the standard time and duration definition (fn = wk × 0.5), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Week to Fortnight Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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