All tools › Fractions, percentages and digits
Decimal to fraction converter
The exact fraction, repeating decimals included — and the nearest sixteenth when a tape measure is what you have.
It runs entirely in this browser tab: what you type is never uploaded, and the tool makes no network request while it works. Open your browser's network panel and try it — nothing leaves the page. There is no sign-up and no limit beyond what your own browser can hold.
Settings
- Repeating digits
- The part that goes on for ever, written once. Applies to every line.
- Nearest fraction over
- Sixteen for a tape measure, sixty-four for a drawing. Zero leaves it out. A number from 0 to 1024.
- Simplest fraction under
- Twenty-two sevenths for pi under ten, three hundred and fifty-five over a hundred and thirteen under a thousand. Zero leaves it out. A number from 0 to 1000000.
- Decimal places
- How many digits after the point. A number from 1 to 30.
- As a mixed number
- Three halves written as one and a half, for anything over one.
How to use it
- Paste your text into the box above, or open a file.
- Adjust the settings beside it until the result is what you wanted.
- Copy the result, or save it as a file. The result updates as you type.
Questions
- Is what I type uploaded anywhere?
- No. This page carries the whole tool as WebAssembly and runs it on your own device. Nothing you type is sent anywhere, and there is no network request to make while it works.
- How exact is the arithmetic?
- Exact, in decimal, for everything the tool was given: no value here is put through floating point on the way to the answer. Where there is a genuine ceiling — thirty-nine digits for the number-theory tools, a fixed number of places for a repeating fraction — the tool says the limit rather than quietly truncating.
- Can I get this result again later?
- The settings travel in the page's address, after the #, so a link reproduces them exactly — and the fragment of an address is never sent to a server. Your last settings are also remembered on this device, which is worth knowing before you paste a number you would not want left there.
- Is there a version that is not a web page?
- Yes. The same tools are built as a desktop application from the same code, with a save dialog instead of a download and no network code at all.
Other tools for fractions, percentages and digits
Percent to fraction converter
A percentage, a fraction and a decimal are one value written three ways; give any one and get the other two.
Digit sum calculator
The sum, the product and the digital root, with the divisibility rules for three, nine and eleven.
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