Fraction ↔ Decimal Converter
Convert a fraction to a decimal or a terminating decimal back to its simplest fraction — instantly, in your browser.
Runs in your browser
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Read the guide →
Turn a fraction into a decimal, or a decimal into a fraction in lowest terms. Done in your browser as you type.
How to use it
- Choose fraction to decimal, or decimal to fraction.
- Enter a numerator and denominator, or a plain decimal such as 0.75 or −3.5.
- Read the result.
Examples
- 3/8 = 0.375
- 1/3 = 0.33333333 (a repeating decimal, rounded)
- 0.125 = 1/8
- 0.35 = 7/20
Good to know
A fraction ends as a decimal only if its denominator, in lowest terms, has no prime factors other than 2 and 5. Others repeat forever, so the tool rounds them. The decimal field accepts plain decimals only: a percentage such as 50% is not accepted. A denominator of zero is rejected.
See how to convert between fractions and decimals.
FAQs
Why is 1/3 not exact?
One third cannot be written exactly as a decimal. Keep it as a fraction when exactness matters.
How do I convert a mixed number?
Convert the fractional part and add the whole number: 2 3/4 is 2 + 0.75 = 2.75.