Create Unicode Fractions

The dedicated characters, yes: a screen reader announces ¼ as “one quarter” because the character carries its own meaning. Constructed fractions built from superscript and subscript digits plus the fraction slash are less reliable, some readers announce them digit by digit. For body text where accessibility matters, dedicated vulgar fractions are the safer choice, with plain text like “3/16” as the fallback when no dedicated character exists.

19 vulgar fractions in standard Unicode (1.1+): ½, ⅓, ⅔, ¼, ¾, ⅕, ⅖, ⅗, ⅘, ⅙, ⅚, ⅐, ⅛, ⅜, ⅝, ⅞, ⅑, ⅒, plus 0⁄3 (↉). For other fractions, the constructed form uses superscript digits (U+2070-2079), fraction slash (U+2044), and subscript digits (U+2080-2089).

Continued-fraction algorithm: compute floor and remainder iteratively, building successive rational approximations. Converges to the best rational within the denominator limit. Example: 0.333 with max-denominator 1000 → 1/3. 3.14159 with max-denominator 10 → 22/7 (the classical π approximation). 3.14159 with max-denominator 1000 → 355/113 (Milü).

Vulgar = single Unicode codepoint designed as a fraction. Renders as a properly-typeset typographic fraction in any font. Constructed = three characters (superscript numerator + fraction-slash + subscript denominator). Renders with whatever superscript/subscript styling the font has. Looks similar but is technically three characters – affects search, line-break behavior, and screen-reader pronunciation.

Because there is no vulgar Unicode character for that fraction. Out of “Vulgar only” mode comes 5/9 as plain ASCII because U+2155 (⅕) and similar only cover the 19 fractions listed above. Picking “Auto” instead lets the tool fall back to the constructed form ⁵⁄₉.

Yes. Negative: -3/4 becomes -¾ (the sign is preserved; the vulgar character represents only the magnitude). Improper: 5/3 by default becomes ⁵⁄₃. With the Mixed-number checkbox, it becomes 1 ⅔.

Mostly yes. Vulgar fractions render correctly in any modern font (Arial, Times, system fonts). Constructed fractions need fonts with superscript/subscript glyphs – some fonts substitute by scaling regular digits, which can look uneven. PDF rendering is reliable; some old email clients strip superscripts/subscripts back to normal digits.

One line per input. Each line is the converted form. Errors are bracketed [error: ...] so you can grep/filter them out. The stats line shows counts per method (e.g., “12 vulgar · 3 constructed · 1 error”).

Bounds the continued-fraction search. Setting it too low (e.g., 10) forces crude approximations – 0.5 still becomes 1/2, but 0.333 becomes 1/3 only if the search has time; 0.314159 might become 22/7 instead of better. Setting it too high (10000) is slower and might find approximations that humans wouldn’t recognize as “the obvious” fraction. 1000 is a good default.

No. Pure browser-side processing. Your fractions don’t leave your device.